TW202313505A - Colored glass articles having improved mechanical durability - Google Patents

Abstract

A colored glass article includes from 40 mol% to 70 mol% SiO2; from 8 mol% to 20 mol% Al2O3; from 1 mol% to 10 mol% B2O3; from 1 mol% to 20 mol% Li2O; from 1 mol% to 15 mol% Na2O; from 0 mol% to 8 mol% MgO; from 0 mol% to 5 mol% ZnO; and from 0.0005 mol% to 1 mol% Au. MgO + ZnO is from 0.1 mol% to 6 mol%.

Description

Colored glass articles with improved mechanical durability

This application is asserted under the Patent Act in U.S. Application No. 17/677,345, filed February 22, 2022, U.S. Provisional Application No. 63/304,807, filed January 31, 2022, filed June 18, 2021 Priority benefits of U.S. Provisional Application No. 63/212,191, filed on 29 November 2021, and U.S. Provisional Application No. 63/283,600, filed November 29, 2021, the contents of each of which are hereby attached, and by This reference is incorporated herein in its entirety.

This specification relates generally to glass compositions and glass articles, and more particularly to glass compositions and resulting ion-exchangeable colored glass articles.

Aluminosilicate glass products can exhibit excellent ion exchange and drop performance. Various industries, including the consumer electronics industry, desire ferrous materials to have the same or similar strength and fracture toughness properties. However, simply including colorants in conventional aluminosilicate glass compositions may not produce the desired color.

Therefore, there is a need for alternative colored glass products with high strength and fracture toughness.

According to the first aspect A1, the colored glass product may contain: greater than or equal to 40 mol % and less than or equal to 70 mol % of SiO ₂ ; greater than or equal to 8 mol % and less than or equal to 20 mol % of SiO 2 Al ₂ O ₃ ; B ₂ O ₃ greater than or equal to 1 mol % and less than or equal to 10 mol %; greater than or equal to 1 mol % and less than or equal to 20 mol % Li ₂ O; greater than or equal to _Na2O equal to 1 mol% and less than or equal to 15 mol%; MgO greater than or equal to 0 mol% and less than or equal to 8 mol%; greater than or equal to 0 mol% and less than or equal to 5 mol% of ZnO; and greater than or equal to 0.0005 mol% and less than or equal to 1 mol% of Au, wherein: MgO+ZnO is greater than or equal to 0.1 mol% and less than or equal to 6 mol%.

The second aspect A2 includes the colored glass article according to the first aspect A1, wherein the MgO+ZnO system is greater than or equal to 0.5 mol% and less than or equal to 5.5 mol%.

The third aspect A3 includes the colored glass article according to the first aspect Al or the second aspect A2, wherein the colored glass article includes greater than or equal to 0.5 mole % and less than or equal to 7 mole % of MgO.

The fourth aspect A4 includes the colored glass article according to any one of the first aspect A1 to the third aspect A3, wherein the colored glass article contains greater than or equal to 0.1 mol % and less than or equal to 4 mol % ZnO.

A fifth aspect A5 includes the colored glass article according to any one of the first aspect A1 to the fourth aspect A4, wherein the colored glass article includes 0.001 mol% and less than or equal to 0.5 mol% of Au.

The sixth aspect A6 includes _the colored glass article according to any one of the first aspect A1 to the fifth aspect A5, wherein the _R2O - _Al2O3 system is greater than or equal to -3 mole % and less than or Equal to 2 mole %.

The seventh aspect A7 includes the colored glass article according to any one of the first aspect A1 to the sixth aspect A6, wherein the colored glass article contains greater than or equal to 0.1 mol % and less than or equal to 2 mol % ZrO ₂ .

The eighth aspect A8 includes the colored glass article according to the seventh aspect A7, wherein the colored glass article includes ZrO ₂ greater than or equal to 0.25 mol % and less than or equal to 1.5 mol %.

A ninth aspect A9 includes the colored glass article according to any one of the first aspect A1 to the eighth aspect A8, wherein the colored glass article contains greater than or equal to 0.1 mol % and less than or equal to 1 mol % of Fe ₂ O ₃ .

The tenth aspect A10 includes the colored glass article according to any one of the first aspect A1 to the ninth aspect A9, wherein 5.72*Al ₂ O ₃ (mole %)-21.4*ZnO (mole %)- 2.5*P ₂ O ₅ (Mole %)-35*Li ₂ O (Mole %)-16.6*B ₂ O ₃ (Mole %)-20.5*MgO (Mole %)-23.3*Na ₂ O ( Mole %)-27.9*SrO (Mole %)-18.5*K ₂ O (Mole %)-26.3*CaO (Mole %) is greater than -609 Mole %.

The eleventh aspect A11 includes the colored glass article according to any one of the first aspect A1 to the tenth aspect A10, wherein the colored glass article contains 0.01 mol% or more and 1 mol% or less SnO ₂ .

A twelfth aspect A12 includes the colored glass article according to the eleventh aspect A11, wherein the colored glass article contains SnO ₂ greater than or equal to 0.05 mol % and less than or equal to 0.75 mol %.

A thirteenth aspect A13 includes the colored glass article according to any one of the first aspect A1 to the twelfth aspect A12, wherein the colored glass article contains 0.01 mol% or more and 1 mol% or less % Sb ₂ O ₃ .

The fourteenth aspect A14 includes the colored glass article according to any one of the first aspect A1 to the thirteenth aspect A13, wherein the colored glass article contains greater than or equal to 0.01 mole % and less than or equal to 1 mole % Bi ₂ O ₃ .

The fifteenth aspect A15 includes the colored glass article according to any one of the first aspect A1 to the fourteenth aspect A14, wherein the colored glass article contains 0.1 mol% or more and 1 mol% or less % P ₂ O ₅ .

A sixteenth aspect A16 includes the colored glass article according to any one of the first aspect A1 to the fourteenth aspect A14, wherein the colored glass article does not substantially contain P ₂ O ₅ .

The seventeenth aspect A17 includes the colored glass product according to any one of the first aspect A1 to the sixteenth aspect A16, wherein R ₂ O is greater than or equal to 2 mol % and less than or equal to 35 mol % %, where R ₂ O is the sum of Li ₂ O, Na ₂ O, and K ₂ O.

The eighteenth aspect A18 includes the colored glass article according to any one of the first aspect A1 to the seventeenth aspect A17, wherein the colored glass article contains greater than or equal to 10 mol % and less than or equal to 18 mol % % Al ₂ O ₃ .

The nineteenth aspect A19 includes the colored glass article according to any one of the first aspect A1 to the eighteenth aspect A18, wherein the colored glass article contains 10 mol% or more and 18 mol% or less % Al ₂ O ₃ .

The twentieth aspect A20 includes the colored glass article according to any one of the first aspect A1 to the nineteenth aspect A19, wherein the colored glass article contains greater than or equal to 3 mol % and less than or equal to 17 mol % % Li ₂ O.

The twenty-first aspect A21 includes the colored glass article according to any one of the first aspect A1 to the twentieth aspect A20, wherein the colored glass article contains 2 mol% or more and 10 mol% or less % Na ₂ O.

The twenty-second aspect A22 includes the colored glass article according to any one of the first aspect A1 to the twenty-first aspect A21, wherein the colored glass article contains greater than or equal to 2 mole % and less than or equal to 8 mole % B ₂ O ₃ .

The twenty-third aspect A23 includes the colored glass article according to any one of the first aspect A1 to the twenty-second aspect A22, wherein the colored glass article contains greater than or equal to 45 mole % and less than or equal to 67 Mole % SiO ₂ .

The twenty-fourth aspect A24 includes the colored glass article according to any one of the first aspect A1 to the twenty-third aspect A23, wherein the colored glass article has transmission color coordinates in the CIELAB color space: L* is greater than or equal to 65 and less than or equal to 97; a* is greater than or equal to -5 and less than or equal to 25; and b* is greater than or equal to -20 and less than or equal to 5.

According to the twenty-fifth aspect A25, the glass composition may contain: SiO ₂ greater than or equal to 40 mol % and less than or equal to 70 mol %; greater than or equal to 8 mol % and less than or equal to 20 mol % % of Al ₂ O ₃ ; greater than or equal to 1 mol % and less than or equal to 10 mol % of B ₂ O ₃ ; greater than or equal to 1 mol % and less than or equal to 20 mol % of Li ₂ O; More than or equal to 1 mol% and less than or equal to 15 mol% of _Na2O ; greater than or equal to 0 mol% and less than or equal to 8 mol% of MgO; greater than or equal to 0 mol% and less than Or equal to 5 mol% of ZnO; greater than or equal to 0.0005 mol% and less than or equal to 1 mol% of Au, wherein: MgO+ZnO is greater than or equal to 0.1 mol% and less than or equal to 6 mol% .

The twenty-sixth aspect A26 includes the glass composition according to the twenty-fifth aspect A25, wherein the glass composition has a melting point of 1550° C. or less.

The twenty-seventh aspect A27 includes the glass composition according to the twenty-fifth aspect A25 or the twenty-sixth aspect A26, wherein the MgO+ZnO system is greater than or equal to 1 mol% and less than or equal to 5 mol% .

The twenty-eighth aspect A28 includes the glass composition according to any one of the twenty-fifth aspect A25 to the twenty-seventh aspect A27, wherein the glass composition contains 1 mol% or more and less than or Equivalent to 6 mole % MgO.

The twenty-ninth aspect A29 includes the glass composition according to any one of the twenty-fifth aspect A25 to the twenty-eighth aspect A28, wherein the glass composition contains 0.1 mol% or more and less than or equal to Equivalent to 3 mol% ZnO.

A thirtieth aspect A30 includes the glass composition according to any one of the twenty-fifth aspect A25 to the twenty-ninth aspect A29, wherein the glass composition contains 0.001 mol % and less than or equal to 0.5 mol % of Au.

The thirty-first aspect A31 includes the glass composition according to any one of the twenty-fifth aspect A25 to the thirtieth aspect A30, wherein R ₂ O—Al ₂ O ₃ is greater than or equal to −3 mol % and less than or equal to 2 mole %.

A thirty-second aspect A32 includes the glass composition according to any one of the twenty-fifth aspect A25 to the thirty-first aspect A31, wherein the glass composition contains 0.1 mol% or more and less than or equal to Equivalent to 2 mol% ZrO ₂ .

A thirty-third aspect A33 includes the glass composition according to the thirty-second aspect A32, wherein the glass composition includes ZrO ₂ greater than or equal to 0.25 mol % and less than or equal to 1.5 mol %.

A thirty-fourth aspect A34 includes the glass composition according to any one of the twenty-fifth aspect A25 to the thirty-third aspect A33, wherein the glass composition contains 0.1 mol% or more and less than or equal to Equivalent to 1 mol% Fe ₂ O ₃ .

The thirty-fifth aspect A35 includes the glass composition according to any one of the twenty-fifth aspect A25 to the thirty-fourth aspect A34, wherein 5.72*Al ₂ O ₃ (mol%)−21.4*ZnO (Mole%)-2.5*P ₂ O ₅ (Mole%)-35*Li ₂ O(Mole%)-16.6*B ₂ O ₃ (Mole%)-20.5*MgO (Mole%)- 23.3*Na ₂ O (mol %)-27.9*SrO (mol %)-18.5*K ₂ O (mol %)-26.3*CaO (mol %) is greater than -609 mol %.

A thirty-sixth aspect A36 includes the glass composition according to any one of the twenty-fifth aspect A25 to the thirty-fifth aspect A35, wherein the glass composition contains 0.01 mol% or more and less than or equal to Equivalent to 1 mol% SnO ₂ .

A thirty-seventh aspect A37 includes the glass composition according to the thirty-sixth aspect A36, wherein the glass composition contains SnO ₂ greater than or equal to 0.05 mol % and less than or equal to 0.5 mol %.

A thirty-eighth aspect A38 includes the glass composition according to any one of the twenty-fifth aspect A25 to the thirty-seventh aspect A37, wherein the glass composition contains 0.01 mol% or more and less than or equal to Equivalent to 1 mol% Sb ₂ O ₃ .

A thirty-ninth aspect A39 includes the glass composition according to any one of the twenty-fifth aspect A25 to the thirty-eighth aspect A38, wherein the glass composition contains 0.01 mol% or more and less than or equal to Equivalent to 1 mol% Bi ₂ O ₃ .

The fortieth aspect A40 includes the glass composition according to any one of the twenty-fifth aspect A25 to the thirty-ninth aspect A39, wherein the glass composition contains 0.1 mol% or more and less than or equal to 1 mol% P ₂ O ₅ .

The forty-first aspect A41 includes the glass composition according to any one of the twenty-fifth aspect A25 to the fortieth aspect A40, wherein the glass composition does not substantially contain P ₂ O ₅ .

The forty-second aspect A42 includes the glass composition according to any one of the twenty-fifth aspect A25 to the forty-first aspect A41, wherein the glass composition contains 0.1 mol% or more and less than or equal to Equivalent to 1 mol% K ₂ O.

The forty-third aspect A43 includes the glass composition according to any one of the twenty-fifth aspect A25 to the forty-second aspect A42, wherein R ₂ O is greater than or equal to 2 mol% and less than or equal to Equal to 35 mole%, wherein R ₂ O is the sum of Li ₂ O, Na ₂ O, and K ₂ O.

The forty-fourth aspect A44 includes the glass composition according to any one of the twenty-fifth aspect A25 to the forty-third aspect A43, wherein the glass composition contains 10 mol% or more and less than or equal to Equivalent to 18 mol% Al ₂ O ₃ .

The forty-fifth aspect A45 includes the glass composition according to any one of the twenty-fifth aspect A25 to the forty-fourth aspect A44, wherein the glass composition contains 3 mol% or more and less than or equal to Equivalent to 17 mol% _Li2O .

The forty-sixth aspect A46 includes the glass composition according to any one of the twenty-fifth aspect A25 to the forty-fifth aspect A45, wherein the glass composition contains 2 mol% or more and less than or Equivalent to 10 mol% _Na2O .

The forty-seventh aspect A47 includes the glass composition according to any one of the twenty-fifth aspect A25 to the forty-sixth aspect A46, wherein the glass composition contains 2 mol% or more and less than or equal to Equivalent to 8 mole % B ₂ O ₃ .

The forty-eighth aspect A48 includes the glass composition according to any one of the twenty-fifth aspect A25 to the forty-seventh aspect A47, wherein the glass composition contains 45 mole % or more and less than or equal to Equivalent to 67 mol % SiO ₂ .

The forty-ninth aspect A49 includes the glass composition according to any one of the twenty-fifth aspect A25 to the forty-eighth aspect A48, wherein the glass composition contains 0 mol% or more and less than or Equal to 1 mole% of cation "M", where "M" is F, Cl, Br, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Se, Nb, Mo, Ru, Rh, Pd , Ag, Cd, In, Te, W, Ir, Pt, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, and Er at least one.

According to the fiftieth aspect A50, the colored glass product may contain: SiO ₂ greater than or equal to 40 mol % and less than or equal to 70 mol %; greater than or equal to 8 mol % and less than or equal to 20 mol % Al ₂ O ₃ ; greater than or equal to 1 mol% and less than or equal to 10 mol% of B ₂ O ₃ ; greater than or equal to 1 mol% and less than or equal to 20 mol% of Li ₂ O; greater than Or equal to 1 mol% and less than or equal to 15 mol% of _Na2O ; greater than or equal to 0 mol% and less than or equal to 6 mol% of MgO; greater than or equal to 0 mol% and less than or ZnO equal to 5 mol%; and Au greater than or equal to 1× ^10-6 mol% and less than or equal to 1 mol%, wherein: MgO+ZnO is greater than or equal to 0.1 mol% and less than or equal to 6 mole %.

A fifty-first aspect A51 includes the glass article according to the fiftieth aspect A50, wherein the MgO+ZnO system is greater than or equal to 0.5 mol% and less than or equal to 5.5 mol%.

The fifty-second aspect A52 includes the glass article according to the fiftieth aspect A50 or the fifty-first aspect A51, wherein the colored glass article contains 0.1 mol% or more and 5 mol% or less of MgO .

The fifty-third aspect A53 includes the glass article according to any one of the fiftieth aspect A50 to the fifty-second aspect A52, wherein the colored glass article contains 0.1 mol % or more and 4 or more mole % Mole % ZnO.

A fifty-fourth aspect A54 includes the glass article according to any one of the fiftieth aspect A50 to the fifty-third aspect A53, wherein the colored glass article contains 1×10 ⁻⁶ mole % or more and less Au equal to or equal to 0.01 mol%.

The fifty-fifth aspect A55 includes the glass article according to any one of the fiftieth aspect A50 to the fifty-fourth aspect, wherein R ₂ O—Al ₂ O ₃ is greater than or equal to −3 mol % and Less than or equal to 2 mole %.

The fifty-sixth aspect A56 includes the article according to any one of the fiftieth aspect A50 to the fifty-fifth aspect A55, wherein the colored glass article contains 0.1 mol% or more and 2 mol% or less Ear % ZrO ₂ .

A fifty-seventh aspect A57 includes an article, wherein the colored glass article includes ZrO ₂ greater than or equal to 0.25 mol % and less than or equal to 1.5 mol %.

The fifty-eighth aspect A58 includes the article according to any one of the fiftieth aspect A50 to the fifty-seventh aspect A57, wherein the colored glass article contains 0.1 mol% or more and 1 mol% or less Ear % Fe ₂ O ₃ .

The fifty-ninth aspect A59 includes the article according to any one of the fiftieth aspect A50 to the fifty-eighth aspect A58, wherein 5.72*Al ₂ O ₃ (mol %)−21.4*ZnO (mol %) %)-2.5*P ₂ O ₅ (Mole %)-35*Li ₂ O (Mole %)-16.6*B ₂ O ₃ (Mole %)-20.5*MgO (Mole %)-23.3*Na ₂ O (mole %)-27.9*SrO (mole %)-18.5*K ₂ O (mole %)-26.3*CaO (mole %) is greater than -609 mole %.

A sixtieth aspect A60 includes the article according to any one of the fiftieth aspect A50 to the fifty-ninth aspect A59, wherein the colored glass article contains greater than or equal to 0.01 mole % and less than or equal to 1 mole % % SnO ₂ .

A sixty-first aspect A61 includes the article according to the sixtieth aspect A60, wherein the colored glass article includes greater than or equal to 0.05 mol % and less than or equal to 0.75 mol % of SnO ₂ .

A sixty-second aspect A62 includes the article according to any one of the fiftieth aspect A50 to the sixty-first aspect A61, wherein the colored glass article contains 0.01 mol% or more and 1 mol% or less Ear % Sb ₂ O ₃ .

A sixty-third aspect A63 includes the article according to any one of the fiftieth aspect A50 to the sixty-second aspect A62, wherein the colored glass article contains 0.01 mol% or more and 1 mol% or less % Bi ₂ O ₃ .

A sixty-fourth aspect A64 includes the article according to any one of the fiftieth aspect A50 to the sixty-third aspect A63, wherein the colored glass article contains 0.1 mol% or more and 1 mol% or less Ear % P ₂ O ₅ .

A sixty-fifth aspect A65 includes the article according to any one of the fiftieth aspect A50 to the sixty-third aspect A63, wherein the colored glass article is substantially free of P ₂ O ₅ .

A sixty-sixth aspect A66 includes the article according to any one of the fiftieth aspect A50 to the sixty-fifth aspect A65, wherein the colored glass article contains 0.1 mol% or more and 1 mol% or less Ear % K ₂ O.

The sixty-seventh aspect A67 includes the article according to any one of the fiftieth aspect A50 to the sixty-sixth aspect A66, wherein R ₂ O is 2 mol% or more and 35 mol% or less %, where R ₂ O is the sum of Li ₂ O, Na ₂ O, and K ₂ O.

A sixty-eighth aspect A68 includes the article according to any one of the fiftieth aspect A50 to the sixty-seventh aspect A67, wherein the colored glass article contains 10 mol% or more and 18 mol% or less % Al ₂ O ₃ .

A sixty-ninth aspect A69 includes the article according to any one of the fiftieth aspect A50 to the sixty-eighth aspect A68, wherein the colored glass article contains 3 mol% or more and 17 mol% or less % Li ₂ O.

A seventieth aspect A70 includes an article according to any one of the fiftieth aspect A50 to the sixty-ninth aspect A69, wherein the colored glass article contains 2 mol% or more and 10 mol% or less % Na ₂ O.

A seventy-first aspect A71 includes the article according to any one of the fiftieth aspect A50 to the seventieth aspect A70, wherein the colored glass article contains 2 mol% or more and 8 mol% or less % B ₂ O ₃ .

A seventy-second aspect A72 includes the article according to any one of the fiftieth aspect A50 to the seventy-first aspect A71, wherein the colored glass article contains 45 mol% or more and 67 mol% or less ear % SiO ₂ .

A seventy-third aspect A73 includes the article according to any one of the fiftieth aspect A50 to the seventy-second aspect A72, wherein the colored glass article has a thickness of 1.33 mm under F2 illumination and a standard observer angle of 10°. The transmission color coordinates in the CIELAB color space measured for the thickness of the article, wherein: L* is greater than or equal to 65 and less than or equal to 98; a* is greater than or equal to -10 and less than or equal to 25; and b* is greater than or equal to Or equal to -20 and less than or equal to 5.

A seventy-fourth aspect A74 includes the article according to any one of the fiftieth aspect A50 to the seventy-third aspect A73, wherein the thickness of the colored glass article is greater than or equal to 250 μm and less than or equal to 6 mm.

A seventy-fifth aspect A75 includes the article according to any one of the fiftieth aspect A50 to the seventy-fourth aspect A74, wherein the colored glass article is an ion-exchanged colored glass article.

Seventy-sixth aspect A76 includes the article according to seventy-fifth aspect A75, wherein the ion-exchanged colored glass article has a depth of compression of 3 μm or greater.

A seventy-seventh aspect A77 includes an article according to any one of the seventy-fifth aspect A75 or the seventy-sixth aspect A76, wherein the ion-exchanged colored glass article has a thickness "t" and is greater than or equal to 0.15 Compression depth of t.

A seventy-eighth aspect A78 includes the article according to any one of the seventy-fifth aspect A75 to the seventy-seventh aspect A77, wherein the ion-exchanged colored glass article has a surface compressive stress greater than or equal to 300 MPa.

Seventy-ninth aspect A79 includes the article according to any one of seventy-fifth aspect A75 to seventy-eighth aspect A78, wherein the ion-exchanged colored glass article has a maximum central tension greater than or equal to 40 MPa.

According to the eightieth aspect A80, the consumer electronic device may include: a housing having a front surface, a rear surface, and a side surface; and electronic components at least partially disposed in the housing, the electronic components at least including a controller, a memory, and a display, the display is disposed at or adjacent to the front surface of the housing; wherein the housing comprises the colored glass article according to the fiftieth aspect A50. .

According to the eighty-first aspect A81, the glass composition may contain: SiO ₂ greater than or equal to 40 mol % and less than or equal to 70 mol %; greater than or equal to 8 mol % and less than or equal to 20 mol % % of Al ₂ O ₃ ; greater than or equal to 1 mol % and less than or equal to 10 mol % of B ₂ O ₃ ; greater than or equal to 1 mol % and less than or equal to 20 mol % of Li ₂ O; More than or equal to 1 mol% and less than or equal to 15 mol% of _Na2O ; greater than or equal to 0 mol% and less than or equal to 6 mol% of MgO; greater than or equal to 0 mol% and less than or ZnO equal to 5 mol%; and Au greater than or equal to 1× ^10-6 mol% and less than or equal to 1 mol%, wherein: MgO+ZnO is greater than or equal to 0.1 mol% and less than or Equal to 6 mole %.

The eighty-second aspect A82 includes the composition according to the eighty-first aspect A81, wherein the glass composition has a melting point of 1550° C. or less.

The eighty-third aspect A83 includes the composition according to the eighty-first aspect A81 or the eighty-second aspect A82, wherein MgO+ZnO is greater than or equal to 0.5 mol% and less than or equal to 5.5 mol%.

The eighty-fourth aspect A84 includes the composition according to any one of the eighty-first aspect A81 to the eighty-third aspect A83, wherein the glass composition contains 0.1 mol% or more and less than or equal to 5 mol% MgO.

The eighty-fifth aspect A85 includes the composition according to any one of the eighty-first aspect A81 to the eighty-fourth aspect A84, wherein the glass composition contains 0.1 mol% or more and less than or equal to 3 mol% ZnO.

The eighty-sixth aspect A86 includes the composition according to any one of the eighty-first aspect A81 to the eighty-fifth aspect A85, wherein the glass composition contains 1×10 ⁻⁶ mole % or more and Less than or equal to 0.01 mol% Au.

_The eighty-seventh aspect A87 includes the composition according to any one of the eighty-first aspect A81 to the eighty-sixth aspect A86, wherein _R2O - _Al2O3 is greater than or equal to -3 moles % and less than or equal to 2 mole %.

The eighty-eighth aspect A88 includes the composition according to any one of the eighty-first aspect A81 to the eighty-seventh aspect A87, wherein the glass composition contains 0.1 mol% or more and less than or equal to 2 mol% ZrO ₂ .

The eighty-ninth aspect A89 includes the composition according to the eighty-eighth aspect A88, wherein the glass composition contains ZrO ₂ greater than or equal to 0.25 mol % and less than or equal to 1.5 mol %.

The ninetieth aspect A90 includes the composition according to any one of the eighty-first aspect A81 to the eighty-ninth aspect A89, wherein the glass composition contains 0.1 mol% or more and less than or equal to 1 Mole % Fe ₂ O ₃ .

The ninety-first aspect A91 includes the composition according to any one of the eighty-first aspect A81 to the ninetieth aspect A90, wherein 5.72*Al ₂ O ₃ (mol %)−21.4*ZnO (mol %) Ear %)-2.5*P ₂ O ₅ (Mole %)-35*Li ₂ O (Mole %)-16.6*B ₂ O ₃ (Mole %)-20.5*MgO (Mole %)-23.3* Na ₂ O (mol %)-27.9*SrO (mol %)-18.5*K ₂ O (mol %)-26.3*CaO (mol %) is greater than -609 mol %.

The ninety-second aspect A92 includes the composition according to any one of the eighty-first aspect A81 to the ninety-first aspect A91, wherein the glass composition contains 0.01 mol% or more and less than or equal to 1 mol% SnO ₂ .

A ninety-third aspect A93 includes the composition according to the ninety-second aspect A92, wherein the glass composition contains SnO ₂ greater than or equal to 0.05 mol % and less than or equal to 0.5 mol %.

The ninety-fourth aspect A94 includes the composition according to any one of the eighty-first aspect A81 to the ninety-third aspect A93, wherein the glass composition contains 0.01 mol% or more and less than or equal to 1 mol% Sb ₂ O ₃ .

The ninety-fifth aspect A95 includes the composition according to any one of the eighty-first aspect A81 to the ninety-fourth aspect A94, wherein the glass composition contains 0.01 mol% or more and less than or equal to 1 mol% Bi ₂ O ₃ .

The ninety-sixth aspect A96 includes the composition according to any one of the eighty-first aspect A81 to the ninety-fifth aspect A95, wherein the glass composition contains 0.1 mol% or more and less than or equal to 1 mol% P ₂ O ₅ .

The ninety-seventh aspect A97 includes the composition according to any one of the eighty-first aspect A81 to the ninety-fifth aspect A95, wherein the glass composition does not substantially contain P ₂ O ₅ .

The ninety-eighth aspect A98 includes the composition according to any one of the eighty-first aspect A81 to the ninety-seventh aspect A97, wherein the glass composition contains 0.1 mol% or more and less than or equal to 1 mol% K ₂ O.

The ninety-ninth aspect A99 includes the composition according to any one of the eighty-first aspect A81 to the ninety-eighth aspect A98, wherein R ₂ O is greater than or equal to 2 mol% and less than or equal to 35 mol%, wherein R ₂ O is the sum of Li ₂ O, Na ₂ O, and K ₂ O.

The hundredth aspect A100 includes the composition according to any one of the eighty-first aspect A81 to the ninety-ninth aspect A99, wherein the glass composition contains 10 mol% or more and 18 mol% or less Mole % Al ₂ O ₃ .

The one-hundred-first aspect A101 includes the composition according to any one of the eighty-first aspect A81 to the one-hundredth aspect A100, wherein the glass composition contains 3 mol% or more and less than or equal to 17 mol% _Li2O .

The one-hundred second aspect A102 includes the composition according to any one of the eighty-first aspect A81 to the one hundred and first aspect A101, wherein the glass composition contains 2 mol% or more and less than or equal to 10 mol% _Na2O .

The one hundred and third aspect A103 includes the composition according to any one of the eighty-first aspect A81 to the one hundred and second aspect A102, wherein the glass composition contains 2 mol% or more and less than or equal to 8 mol% B ₂ O ₃ .

The one hundred and fourth aspect A104 includes the composition according to any one of the eighty-first aspect A81 to the one hundred and third aspect A103, wherein the glass composition contains greater than or equal to 45 mole % and less than or equal to 67 mol % SiO ₂ .

The one-hundred fifth aspect A105 includes the composition according to any one of the eighty-first aspect A81 to the one-hundred-fourth aspect A104, wherein the glass composition contains 0 mole % or more and less than Or equal to 1 mole% cation "M", wherein "M" is F, Cl, Br, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Se, Nb, Mo, Ru, Rh, At least one of Pd, Ag, Cd, In, Te, W, Ir, Pt, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, and Er.

According to the one hundred and sixth aspect A106, the method of forming a colored glass product may include the step of: performing thermal processing on a glass composition to form a glass product, the glass composition comprising: greater than or equal to 40 mole % and less than or SiO ₂ equal to 70 mol %; Al ₂ O ₃ greater than or equal to 8 mol % and less than or equal to 20 mol %; B ₂ greater than or equal to 1 mol % and less than or equal to 10 mol % O ₃ ; Li ₂ O greater than or equal to 1 mol % and less than or equal to 20 mol % ; greater than or equal to 1 mol % and less than or equal to 15 mol % Na ₂ O ; greater than or equal to 0 mol % mol% and less than or equal to 6 mol% of MgO; greater than or equal to 0 mol% and less than or equal to 5 mol% of ZnO; and greater than or equal to 1× ^10-6 mol% and less than or equal to 1 mol% of Au, wherein: MgO+ZnO is greater than or equal to 0.1 mol% and less than or equal to 6 mol%; and at a temperature greater than or equal to 500°C and less than or equal to 800°C and greater than or equal to The glass article is subjected to a thermal processing cycle for a duration of 0.25 hours and less than or equal to 24 hours to produce a colored glass article.

The one hundred seventh aspect A107 includes the method according to the one hundred sixth aspect A106, wherein the temperature of the thermal processing cycle is greater than or equal to 550°C and less than or equal to 775°C.

One-hundred-eighth aspect A108 includes the method according to one-hundred-sixth aspect A106 or one-hundred-seventh aspect A107, wherein the duration of the thermal processing cycle is greater than or equal to 0.5 hours and less than or equal to 16 hours .

The one-hundred-ninth aspect A109 includes the method according to any one of the one-hundred-sixth aspect A106 to the one-hundred-eighth aspect A108, further comprising the step of: The colored glass article is strengthened in the ion exchange bath at a temperature of 500° C. for a period of greater than or equal to 2 hours to less than or equal to 12 hours to form an ion-exchanged glass-ceramic article.

The one-hundred tenth aspect A110 includes the method according to the one-hundred ninth aspect A109, wherein the ion exchange bath comprises KNO ₃ .

The one hundred and eleventh aspect A11 includes the method according to the one hundred and tenth aspect A110, wherein the ion exchange bath contains NaNO ₃ .

Additional features and advantages of the colored glass articles described herein will be set forth in the detailed description that follows, and those of ordinary skill in the art will be able to understand the additional features and advantages in part from the description, or by practicing the colored glass products herein (including Additional features and advantages are apparent from the embodiments described in the following detailed description, claims, and accompanying drawings).

It is to be understood that both the foregoing general description and the following detailed description describe various embodiments, and are intended to provide an overview or framework for understanding the nature and character of what is claimed. The accompanying drawings are included to provide a further understanding of the various embodiments, and are incorporated in and constitute a part of this specification. The drawings illustrate the various embodiments described herein, and together with the description serve to explain the principles and operations of the claimed subject matter.

Reference will now be made in detail to various embodiments of glass compositions and resulting colored glass articles having desired colors. According to an embodiment, the colored glass article comprises: greater than or equal to 40 mol % and less than or equal to 70 mol % of SiO ₂ ; greater than or equal to 8 mol % and less than or equal to 20 mol % of Al ₂ O ₃ ; greater than or equal to 1 mol % and less than or equal to 10 mol % of B ₂ O ₃ ; greater than or equal to 1 mol % and less than or equal to 20 mol % of Li ₂ O ; greater than or equal to 1 mol % % and less than or equal to 15 mol% of _Na2O ; greater than or equal to 0 mol% and less than or equal to 8 mol% of MgO; greater than or equal to 0 mol% and less than or equal to 5 mol% ZnO; and greater than or equal to 0.0005 mol% and less than or equal to 1 mol% of Au. MgO+ZnO is greater than or equal to 0.1 mol% and less than or equal to 6 mol%.

According to other embodiments, the colored glass article comprises: greater than or equal to 40 mol % and less than or equal to 70 mol % SiO ₂ ; greater than or equal to 8 mol % and less than or equal to 20 mol % Al ₂ O ₃ ; B ₂ O ₃ greater than or equal to 1 mol% and less than or equal to 10 mol%; greater than or equal to 1 mol% and less than or equal to 20 mol% of Li ₂ O; greater than or equal to 1 mol% mol% and less than or equal to 15 mol% of _Na2O ; greater than or equal to 0 mol% and less than or equal to 6 mol% of MgO; greater than or equal to 0 mol% and less than or equal to 5 mol% % of ZnO; and greater than or equal to 1×10 ⁻⁶ mol % and less than or equal to 1 mol % of Au. MgO+ZnO is greater than or equal to 0.1 mol% and less than or equal to 6 mol%.

Various embodiments of colored glass articles and methods of making the same will be described herein with specific reference to the accompanying drawings.

Ranges expressed herein can be from "about" one particular value, and/or to "about" another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value. Likewise, when values are expressed in approximations, using the preposition "about," it will be understood that the particular value forms another embodiment. It can further be appreciated that each endpoint of a range is distinctly related to, and independent of, the other endpoint.

Directional terms (eg, up, down, right, left, front, rear, top, bottom) as used herein are for illustration only with respect to the drawings and are not intended to imply absolute orientations.

Unless expressly stated otherwise, any method described herein is not to be construed as having to be constructed to perform its steps in a particular order, nor does it require a particular orientation of any device. Thus, where a method claim does not actually recite the order of its steps, or any apparatus claim does not actually recite the order or orientation of individual components, or does not specify in the claim or narration that the steps are limited to a particular order, or does not Where a specific order or orientation of parts of a device is recited, in no respect is this order or orientation to be inferred in any way. This applies to any possible non-expressive basis for illustration, including: logical subject matter for arrangement of steps, operational flow, sequence of parts, or orientation of parts; general meaning derived from grammatical organization or punctuation; and Number or type of examples.

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a" element includes aspects having two or more elements unless the context clearly dictates otherwise.

In the examples of the glass compositions and resulting colored glass articles described herein, the concentrations of the constituents in the form of oxides (e.g., SiO ₂ , Al ₂ O ₃ , and the like) are present unless otherwise indicated. It is specified in mole percent (mole %) on an oxide basis.

In the examples of the glass compositions and resulting colored glass articles described herein, unless otherwise indicated, Au concentrations are indicated in molar percentages (mole %).

In the examples of the glass compositions and resulting colored glass articles described herein, unless otherwise indicated, the concentration of the cation "M" is specified in molar percent (Mole %).

When used to describe the concentration and/or absence of a particular constituent in the glass composition and resulting colored glass article, the terms "0 mole percent," "free," and "substantially free" refer to No constituents are intentionally added to the glass compositions and resulting colored glass articles. However, the glass compositions and resulting colored glass articles may contain the constituents in amounts less than 0.01 mol % as contaminants or residues.

The term "fracture toughness" as used herein refers to the K _Ic value and is measured by the gable notched short rod method. The mountain notched short stem (CNSB) method is described in "Fracture Toughness Measurement of Glass" by Reddy, KPR et al., J. Am. Ceram. Soc., 71 [6], C-310-C-313 (1988). and Ceramic Materials Using Chevron-Notched Specimens", except that "Closed-Form Expressions for Crack-Mouth Displacement and Stress Intensity Factors for Chevron-Notched Short Bar and Short Rod Specimens Based on Experimental Compliance Measurements" to calculate Y*m.

The viscosity of the glass compositions described herein is measured according to ASTM C965-96.

The term "melting point" as used herein refers to the temperature at which the viscosity of the glass composition is 200 poise.

The term "softening point" used herein refers to the temperature at which the viscosity of the glass composition is 1×10 ^7.6 poise. The softening point is measured according to the parallel plate viscosity method, similar to ASTM C1351M, which measures the viscosity of inorganic glass from 10 ⁷ to 10 ⁹ poise as a function of temperature.

The term "annealing point" used herein refers to the temperature at which the viscosity of the glass composition is 1×10 ^13.18 poise.

The term "strain point" used herein refers to the temperature at which the viscosity of the glass composition is 1×10 ^14.68 poise.

As described herein, the terms "coefficient of linear thermal expansion" and "CTE" are measured in accordance with ASTM E228-85 in the temperature range from 25°C to 300°C, and expressed as "×10 ^-7 /°C" as the average of the temperature range .

The term "liquidus viscosity" as used herein refers to the viscosity of the glass composition at the onset of devitrification (ie, at the liquidus temperature determined by the gradient furnace method according to ASTM C829-81).

As used herein, the term "liquidus temperature" refers to the temperature at which a glass composition begins to devitrify as measured by a gradient furnace method according to ASTM C829-81.

The surface compressive stress is measured using a surface stress meter (FSM) (for example, a commercially available instrument such as FSM-6000 manufactured by Orihara Industrial Co., Ltd (Japan)). Surface stress measurements depend on the measurement of the stress optic coefficient (SOC), which is related to the birefringence of the glass article. SOC was then measured according to Procedure C (glass dish method) described in ASTM Standard C770-16 entitled "Standard Test Method for Measurement of Glass Stress-Optical Coefficient," the contents of which are incorporated herein by reference in their entirety. Depth of compression (DOC) was also measured using FSM. Maximum central tension (CT) values were measured using the Scattered Light Polarizer (SCALP) technique known in the art.

As used herein, the term "depth of compression" (DOC) refers to the location in an article where compressive stress transforms into tensile stress.

As used herein, the term "CIELAB color space" refers to the color space defined by the International Commission on Illumination (CIE) in 1976. Colors are expressed as three values: L* for black (0) to white (100), a* for green (-) to red (+), and B* for blue (-) to yellow (+).

As used herein, the term "color gamut" refers to the palette of colors that can be achieved by colored glazing within the CIELAB color space.

As shown in this article, the "optical transmission spectrum" is obtained by using an Agilent Cary 60 spectrophotometer, the scanning range is 250nm to 800nm, the scanning step is 2nm, the signal average is 0.5s, and the spot size is 2mm. The light transmission data obtained were used to plot coordinates in the CIELAB color space as described in R.S. Berns, Billmeyer and Saltzman's Principles of Color Technology, 3rd. Ed., John Wiley & Sons, New York (2000).

Colorants are added to conventional aluminosilicate glass compositions to achieve colored glass articles with desired colors and improved mechanical properties. For example, gold (Au) doped glass products are red, orange, purple, or blue. However, simply including a colorant in an aluminosilicate glass composition may not produce the desired color. For example, Au evaporates at temperatures greater than 1400°C. Conventional aluminosilicate glass compositions may have a melting point greater than 1500° C., which results in poor Au retention during processing. Lower Au retention limits the achievable color gamut and may at best lead to a reddish tinge to the glass.

Disclosed herein are glass compositions and colored glass articles formed therefrom that alleviate the above-mentioned problems, such that Au can be added to aluminosilicate glass compositions to produce colored glass articles with a desired color while maintaining the color of the colored glass articles. Excellent ion exchange and drop performance. Specifically, the glass compositions disclosed herein improve Au retention by including MgO and/or ZnO. Increased retention of Au expands the achievable color gamut of the resulting colored glass articles and helps reduce the amount of Au that needs to be batched, significantly reducing batch costs. In addition, the concentration of certain constituent components can be adjusted to achieve the desired color and prevent the formation of Au particles.

The glass compositions and colored glass articles described herein may be described as aluminoborosilicate glass compositions and colored glass articles, and include SiO ₂ , Al ₂ O ₃ , and B ₂ O ₃ . The glass compositions and colored glass articles described herein include Au in addition to _SiO2 , _Al2O3 , and _B2O3 to produce _colored glass articles having a desired color _. The glass compositions and colored glass products described herein also include alkali metal oxides (eg, Li ₂ O and Na ₂ O) to achieve ion exchange properties of the colored glass products. The glass compositions and colored glass articles described herein further include MgO and/or ZnO to improve Au retention and produce colored glass articles with desired colors. In addition, the difference between R ₂ O and Al ₂ O ₃ (that is, R ₂ O (mole %)-Al ₂ O ₃ ( mol%)) to produce the desired observable color (eg, pink, purple, red, orange, or blue). In addition, the viscosity of the glass composition can be adjusted to prevent devitrification of the glass composition and the formation of Au particles that may limit the achievable color gamut prior to melting.

The _SiO2 system is the primary glass former in the glass compositions described herein and can be used to stabilize the network structure of colored glass articles. The concentration of _SiO2 in the glass composition and resulting colored glass article should be sufficiently high (e.g., greater than or equal to 40 mole percent) to enhance the chemical durability of the glass composition (more specifically against exposure to acidic solutions, Alkaline solutions, and resistance to degraded glass compositions in water). Since the melting point of pure SiO ₂ or high SiO ₂ glass is too high, the amount of SiO ₂ can be limited (for example, less than or equal to 70 mol%) to control the melting point of the glass composition. Therefore, limiting the concentration of _SiO2 can help to improve the meltability and formability of the resulting colored glass articles.

In an embodiment, the glass composition and the resulting colored glass article may contain SiO ₂ greater than or equal to 40 mol % and less than or equal to 70 mol %. In an embodiment, the glass composition and the resulting colored glass article may contain SiO ₂ greater than or equal to 45 mol % and less than or equal to 67 mol %. In an embodiment, the concentration of _SiO in the glass composition and the resulting colored glass product can be greater than or equal to 40 mol%, greater than or equal to 45 mol%, greater than or equal to 50 mol%, greater than or equal to 53 Mole %, greater than or equal to 55 mole %, or even greater than or equal to 57 mole %. In an embodiment, the glass composition and the resulting colored glass product may have a _SiO concentration of less than or equal to 70 mol%, less than or equal to 67 mol%, less than or equal to 65 mol%, less than or equal to 65 mol%. 63 mol% or less, 62 mol% or less, 61 mol% or less, or even 60 mol% or less. In an embodiment, the concentration of _SiO in the glass composition and the resulting colored glass product may be greater than or equal to 40 mol % and less than or equal to 70 mol %, greater than or equal to 40 mol % and less than or equal to Equal to 67 mol%, greater than or equal to 40 mol% and less than or equal to 65 mol%, greater than or equal to 40 mol% and less than or equal to 63 mol%, greater than or equal to 40 mol% and less Or equal to 62 mol%, greater than or equal to 40 mol% and less than or equal to 61 mol%, greater than or equal to 40 mol% and less than or equal to 60 mol%, greater than or equal to 45 mol% and less 70 mol% or more, 45 mol% or more and 67 mol% or less, 45 mol% or more and 65 mol% or less, 45 mol% or more and Less than or equal to 63 mol%, greater than or equal to 45 mol% and less than or equal to 62 mol%, greater than or equal to 45 mol% and less than or equal to 61 mol%, greater than or equal to 45 mol% And less than or equal to 60 mol%, greater than or equal to 50 mol% and less than or equal to 70 mol%, greater than or equal to 50 mol% and less than or equal to 67 mol%, greater than or equal to 50 mol% % and less than or equal to 65 mol%, greater than or equal to 50 mol% and less than or equal to 63 mol%, greater than or equal to 50 mol% and less than or equal to 62 mol%, greater than or equal to 50 mol% Mole% and less than or equal to 61 mole%, greater than or equal to 50 mole% and less than or equal to 60 mole%, greater than or equal to 53 mole% and less than or equal to 70 mole%, greater than or equal to 53 Mole% and less than or equal to 67 mole%, greater than or equal to 53 mole% and less than or equal to 65 mole%, greater than or equal to 53 mole% and less than or equal to 63 mole%, greater than or equal to 53 mol% and less than or equal to 62 mol%, greater than or equal to 53 mol% and less than or equal to 61 mol%, greater than or equal to 53 mol% and less than or equal to 60 mol%, greater than or equal to Equal to 55 mol% and less than or equal to 70 mol%, greater than or equal to 55 mol% and less than or equal to 67 mol%, greater than or equal to 55 mol% and less than or equal to 65 mol%, greater than or equal to 55 mol% and less than or equal to 63 mol%, greater than or equal to 55 mol% and less than or equal to 62 mol%, greater than or equal to 55 mol% and less than or equal to 61 mol%, Greater than or equal to 55 mol% and less than or equal to 60 mol%, greater than or equal to 57 mol% and less than or equal to 70 mol%, greater than or equal to 57 mol% and less than or equal to 67 mol% , greater than or equal to 57 mol% and less than or equal to 65 mol%, greater than or equal to 57 mol% and less than or equal to 63 mol%, greater than or equal to 57 mol% and less than or equal to 62 mol% %, greater than or equal to 57 mole % and less than or equal to 61 mole %, or even greater than or equal to 57 mole % and less than or equal to 60 mole %, or any of these endpoints formed Any and all subranges.

Like SiO ₂ , Al ₂ O ₃ can also stabilize the glass network and additionally provide improved mechanical properties and chemical durability for the glass composition and resulting colored glass articles. The amount of Al ₂ O ₃ can also be adjusted to control the viscosity of the glass composition. Al ₂ O ₃ may be included so that the obtained glass composition has desired fracture toughness (for example, greater than or equal to 0.7 MPa·m1/2). However, if the amount of Al ₂ O ₃ is too high (eg, greater than 20 mole %), the viscosity of the melt may increase, reducing the formability of colored glass articles.

Therefore, in an embodiment, the glass composition and the resulting colored glass article may contain Al ₂ O ₃ greater than or equal to 8 mol % and less than or equal to 20 mol %. In an embodiment, the glass composition and the resulting colored glass product may contain Al ₂ O ₃ greater than or equal to 10 mol % and less than or equal to 18 mol %. In an embodiment, the concentration of Al ₂ O ₃ in the glass composition and the resulting colored glass product may be greater than or equal to 8 mol%, greater than or equal to 10 mol%, greater than or equal to 12 mol%, greater than or equal to Equal to 12.5 mol%, greater than or equal to 13 mol%, greater than or equal to 13.5 mol%, or even greater than or equal to 14 mol%. In an embodiment, the concentration of Al ₂ O ₃ in the glass composition and the resulting colored glass product may be less than or equal to 20 mol%, less than or equal to 18 mol%, less than or equal to 17.5 mol% , or even less than or equal to 17 mol%. In an embodiment, the concentration of Al ₂ O ₃ in the glass composition and the resulting colored glass product may be greater than or equal to 8 mol % and less than or equal to 20 mol %, greater than or equal to 8 mol % and less 18 mol% or more, 8 mol% or more and 17.5 mol% or less, 8 mol% or more and 17 mol% or less, 10 mol% or more and Less than or equal to 20 mol%, greater than or equal to 10 mol% and less than or equal to 18 mol%, greater than or equal to 10 mol% and less than or equal to 17.5 mol%, greater than or equal to 10 mol% And less than or equal to 17 mol%, greater than or equal to 12 mol% and less than or equal to 20 mol%, greater than or equal to 12 mol% and less than or equal to 18 mol%, greater than or equal to 12 mol% % and less than or equal to 17.5 mol%, greater than or equal to 12 mol% and less than or equal to 17 mol%, greater than or equal to 12.5 mol% and less than or equal to 20 mol%, greater than or equal to 12.5 mol% Mole% and less than or equal to 18 mol%, greater than or equal to 12.5 mol% and less than or equal to 17.5 mol%, greater than or equal to 12.5 mol% and less than or equal to 17 mol%, greater than or equal to 13 Mole% and less than or equal to 20 mole%, greater than or equal to 13 mole% and less than or equal to 18 mole%, greater than or equal to 13 mole% and less than or equal to 17.5 mole%, greater than or equal to 13 mol% and less than or equal to 17 mol%, greater than or equal to 13.5 mol% and less than or equal to 20 mol%, greater than or equal to 13.5 mol% and less than or equal to 18 mol%, greater than or equal to Equal to 13.5 mol% and less than or equal to 17.5 mol%, greater than or equal to 13.5 mol% and less than or equal to 17 mol%, greater than or equal to 14 mol% and less than or equal to 20 mol%, greater than or equal to 14 mol% and less than or equal to 18 mol%, greater than or equal to 14 mol% and less than or equal to 17.5 mol%, or even greater than or equal to 14 mol% and less than or equal to 17 mol% %, or any and all subranges formed by any of these endpoints.

B ₂ O ₃ reduces the melting point of the glass composition, which may help improve Au retention. B ₂ O ₃ can also improve the damage resistance of the resulting colored glass articles. In addition, _B2O3 was added to reduce the formation of non-bridging oxygen, whose _presence may reduce fracture toughness. _{The B2O3} concentration should be sufficiently high (eg, greater than or equal to 1 mole %) to lower the melting point of the glass composition, improve formability, and increase the fracture toughness of the colored glass article. However, if the B ₂ O ₃ is too high (eg, greater than 10 mole %), the annealing point and strain point may decrease, increasing stress relaxation and reducing the overall strength of the colored glass article.

In an embodiment, the glass composition and the resulting colored glass product may contain B ₂ O ₃ greater than or equal to 1 mol % and less than or equal to 10 mol %. In an embodiment, the glass composition and the resulting colored glass product may contain B ₂ O ₃ greater than or equal to 2 mol % and less than or equal to 8 mol %. In an embodiment, the concentration of _B2O3 in the glass composition and _the resulting colored glass product may be greater than or equal to 1 mol%, greater than or equal to 2 mol%, greater than or equal to 3 mol%, greater than or equal to Equal to 4 mol%, greater than or equal to 4.5 mol%, greater than or equal to 5 mol%, or even greater than or equal to 5.5 mol%. In an embodiment, the concentration of _B2O3 in the glass composition and the resulting colored glass product may be less than or equal to 10 mol% _, less than or equal to 9 mol%, less than or equal to 8 mol% , less than or equal to 7.5 mole %, less than or equal to 7 mole %, or even less than or equal to 6.5 mole %. In an embodiment, the concentration of B ₂ O ₃ in the glass composition and the resulting colored glass product may be greater than or equal to 1 mol % and less than or equal to 10 mol %, greater than or equal to 1 mol % and less 9 mol% or more, 1 mol% or more and 8 mol% or less, 1 mol% or more and 7.5 mol% or less, 1 mol% or more and Less than or equal to 7 mol%, greater than or equal to 1 mol% and less than or equal to 6.5 mol%, greater than or equal to 2 mol% and less than or equal to 10 mol%, greater than or equal to 2 mol% And less than or equal to 9 mol%, greater than or equal to 2 mol% and less than or equal to 8 mol%, greater than or equal to 2 mol% and less than or equal to 7.5 mol%, greater than or equal to 2 mol% % and less than or equal to 7 mol%, greater than or equal to 2 mol% and less than or equal to 6.5 mol%, greater than or equal to 3 mol% and less than or equal to 10 mol%, greater than or equal to 3 mol% Mole% and less than or equal to 9 mole%, greater than or equal to 3 mole% and less than or equal to 8 mole%, greater than or equal to 3 mole% and less than or equal to 7.5 mole%, greater than or equal to 3 mol% and less than or equal to 7 mol%, greater than or equal to 3 mol% and less than or equal to 6.5 mol%, greater than or equal to 4 mol% and less than or equal to 10 mol%, greater than or equal to 4 mol% and less than or equal to 9 mol%, greater than or equal to 4 mol% and less than or equal to 8 mol%, greater than or equal to 4 mol% and less than or equal to 7.5 mol%, greater than or equal to Equal to 4 mol% and less than or equal to 7 mol%, greater than or equal to 4 mol% and less than or equal to 6.5 mol%, greater than or equal to 4.5 mol% and less than or equal to 10 mol%, greater than or equal to 4.5 mol% and less than or equal to 9 mol%, greater than or equal to 4.5 mol% and less than or equal to 8 mol%, greater than or equal to 4.5 mol% and less than or equal to 7.5 mol%, Greater than or equal to 4.5 mol% and less than or equal to 7 mol%, greater than or equal to 4.5 mol% and less than or equal to 6.5 mol%, greater than or equal to 5 mol% and less than or equal to 10 mol% , greater than or equal to 5 mol% and less than or equal to 9 mol%, greater than or equal to 5 mol% and less than or equal to 8 mol%, greater than or equal to 5 mol% and less than or equal to 7.5 mol% %, greater than or equal to 5 mol% and less than or equal to 7 mol%, greater than or equal to 5 mol% and less than or equal to 6.5 mol%, greater than or equal to 5.5 mol% and less than or equal to 10 mol% mol%, greater than or equal to 5.5 mol% and less than or equal to 9 mol%, greater than or equal to 5.5 mol% and less than or equal to 8 mol%, greater than or equal to 5.5 mol% and less than or equal to 7.5 mol%, greater than or equal to 5.5 mol% and less than or equal to 7 mol%, or even greater than or equal to 5.5 mol% and less than or equal to 6.5 mol%, or any of these endpoints Any and all subranges formed.

As mentioned above, the glass composition and the obtained colored glass product may contain alkali metal oxides (for example, Li ₂ O and Na ₂ O) in order to realize the ion exchange property of the colored glass product.

Li ₂ O contributes to the ion exchangeability of the colored glass, and also lowers the softening point of the glass composition, thereby increasing the formability of the colored glass. In addition, Li ₂ O lowers the melting point of the glass composition, which may help improve Au retention. The _Li2O concentration in the glass composition and resulting colored glass article should be sufficiently high (e.g., greater than or equal to 1 mole %) to lower the melting point of the glass composition and achieve the desired maximum central tension (e.g., Greater than or equal to 40MPa). However, if the amount of _Li2O is too high (eg, greater than 20 mole %), the liquidus temperature may increase, reducing the manufacturability of colored glass articles.

In an embodiment, the glass composition and the resulting colored glass product may contain Li ₂ O in an amount greater than or equal to 1 mol % and less than or equal to 20 mol %. In an embodiment, the glass composition and the resulting colored glass product may contain Li ₂ O greater than or equal to 3 mol % and less than or equal to 17 mol %. In an embodiment, the concentration of Li ₂ O in the glass composition and the obtained colored glass product may be greater than or equal to 1 mol%, greater than or equal to 3 mol%, greater than or equal to 5 mol%, greater than or equal to 7 mol%, greater than or equal to 7.5 mol%, greater than or equal to 8 mol%, greater than or equal to 8.5 mol%, or even greater than or equal to 9 mol%. In an embodiment, the concentration of _Li2O in the glass composition and the obtained colored glass product may be less than or equal to 20 mol%, less than or equal to 17 mol%, less than or equal to 15 mol%, Less than or equal to 13 mol%, less than or equal to 12.5 mol%, less than or equal to 12 mol%, less than or equal to 11.5 mol%, or even less than or equal to 11 mol%. In an embodiment, the concentration of Li ₂ O in the glass composition and the obtained colored glass product may be greater than or equal to 1 mol% and less than or equal to 20 mol%, greater than or equal to 1 mol% and less than Or equal to 17 mol%, greater than or equal to 1 mol% and less than or equal to 15 mol%, greater than or equal to 1 mol% and less than or equal to 13 mol%, greater than or equal to 1 mol% and less 12.5 mol% or more, 1 mol% or more and 12 mol% or less, 1 mol% or more and 11.5 mol% or less, 1 mol% or more and Less than or equal to 11 mol%, greater than or equal to 3 mol% and less than or equal to 20 mol%, greater than or equal to 3 mol% and less than or equal to 17 mol%, greater than or equal to 3 mol% And less than or equal to 15 mol%, greater than or equal to 3 mol% and less than or equal to 13 mol%, greater than or equal to 3 mol% and less than or equal to 12.5 mol%, greater than or equal to 3 mol% % and less than or equal to 12 mol%, greater than or equal to 3 mol% and less than or equal to 11.5 mol%, greater than or equal to 3 mol% and less than or equal to 11 mol%, greater than or equal to 5 mol% mol% and less than or equal to 20 mol%, greater than or equal to 5 mol% and less than or equal to 17 mol%, greater than or equal to 5 mol% and less than or equal to 15 mol%, greater than or equal to 5 Mole% and less than or equal to 13 mole%, greater than or equal to 5 mole% and less than or equal to 12.5 mole%, greater than or equal to 5 mole% and less than or equal to 12 mole%, greater than or equal to 5 mol% and less than or equal to 11.5 mol%, greater than or equal to 5 mol% and less than or equal to 11 mol%, greater than or equal to 7 mol% and less than or equal to 20 mol%, greater than or equal to Equal to 7 mol% and less than or equal to 17 mol%, greater than or equal to 7 mol% and less than or equal to 15 mol%, greater than or equal to 7 mol% and less than or equal to 13 mol%, greater than or equal to 7 mol% and less than or equal to 12.5 mol%, greater than or equal to 7 mol% and less than or equal to 12 mol%, greater than or equal to 7 mol% and less than or equal to 11.5 mol%, Greater than or equal to 7 mol% and less than or equal to 11 mol%, greater than or equal to 7.5 mol% and less than or equal to 20 mol%, greater than or equal to 7.5 mol% and less than or equal to 17 mol% , greater than or equal to 7.5 mol% and less than or equal to 15 mol%, greater than or equal to 7.5 mol% and less than or equal to 13 mol%, greater than or equal to 7.5 mol% and less than or equal to 12.5 mol% %, greater than or equal to 7.5 mol% and less than or equal to 12 mol%, greater than or equal to 7.5 mol% and less than or equal to 11.5 mol%, greater than or equal to 7.5 mol% and less than or equal to 11 mol% mol%, greater than or equal to 8 mol% and less than or equal to 20 mol%, greater than or equal to 8 mol% and less than or equal to 17 mol%, greater than or equal to 8 mol% and less than or equal to 15 Mole%, greater than or equal to 8 mole% and less than or equal to 13 mole%, greater than or equal to 8 mole% and less than or equal to 12.5 mole%, greater than or equal to 8 mole% and less than or equal to 12 mol%, greater than or equal to 8 mol% and less than or equal to 11.5 mol%, greater than or equal to 8 mol% and less than or equal to 11 mol%, greater than or equal to 8.5 mol% and less than or Equal to 20 mol%, greater than or equal to 8.5 mol% and less than or equal to 17 mol%, greater than or equal to 8.5 mol% and less than or equal to 15 mol%, greater than or equal to 8.5 mol% and less Or equal to 13 mol%, greater than or equal to 8.5 mol% and less than or equal to 12.5 mol%, greater than or equal to 8.5 mol% and less than or equal to 12 mol%, greater than or equal to 8.5 mol% and less 11.5 mol% or more, 8.5 mol% or more and 11 mol% or less, 9 mol% or more and 20 mol% or less, 9 mol% or more and Less than or equal to 17 mol%, greater than or equal to 9 mol% and less than or equal to 15 mol%, greater than or equal to 9 mol% and less than or equal to 13 mol%, greater than or equal to 9 mol% and less than or equal to 12.5 mol%, greater than or equal to 9 mol% and less than or equal to 12 mol%, greater than or equal to 9 mol% and less than or equal to 11.5 mol%, or even greater than or equal to 9 Mole % and less than or equal to 11 Mole %, or any and all subranges formed by any of these endpoints.

Na ₂ O improves the diffusivity of alkali metal ions in the glass, thereby reducing ion exchange time, and contributes to achieving a desired surface compressive stress (for example, greater than or equal to 300 MPa). _Na2O also improves the formability of colored glass articles. In addition, Na ₂ O lowers the melting point of the glass composition, which may help improve Au retention. However, if too much Na ₂ O is added to the glass composition, the melting point may be too low. Therefore, in an embodiment, the concentration of Li ₂ O present in the glass composition and the obtained colored glass article may be greater than the concentration of Na ₂ O present in the glass composition and the obtained colored glass article.

In an embodiment, the glass composition and the resulting colored glass article may contain Na ₂ O greater than or equal to 1 mol % and less than or equal to 15 mol %. In an embodiment, the glass composition and the resulting colored glass article may contain Na ₂ O greater than or equal to 2 mol % and less than or equal to 10 mol %. In an embodiment, the concentration of Na ₂ O in the glass composition and the obtained colored glass product may be greater than or equal to 1 mol%, greater than or equal to 2 mol%, greater than or equal to 3 mol%, greater than or equal to 3.5 mole%, greater than or equal to 4 mole%, or even greater than or equal to 4.5 mole%. In an embodiment, the concentration of Na ₂ O in the glass composition and the obtained colored glass product may be less than or equal to 15 mol%, less than or equal to 10 mol%, less than or equal to 8 mol%, Less than or equal to 7.5 mol%, less than or equal to 7 mol%, less than or equal to 6.5 mol%, less than or equal to 6 mol%, or even less than or equal to 5.5 mol%. In an embodiment, the concentration of Na ₂ O in the glass composition and the obtained colored glass product may be greater than or equal to 1 mol % and less than or equal to 15 mol %, greater than or equal to 1 and less than or equal to 10 mol %. Mole%, greater than or equal to 1 mole% and less than or equal to 8 mole%, greater than or equal to 1 mole% and less than or equal to 7.5 mole%, greater than or equal to 1 mole% and less than or equal to 7 mol%, greater than or equal to 1 mol% and less than or equal to 6.5 mol%, greater than or equal to 1 mol% and less than or equal to 6 mol%, greater than or equal to 1 mol% and less than or Equal to 5.5 mol%, greater than or equal to 2 mol% and less than or equal to 15 mol%, greater than or equal to 2 and less than or equal to 10 mol%, greater than or equal to 2 mol% and less than or equal to 8 Mole %, greater than or equal to 2 mole % and less than or equal to 7.5 mole %, greater than or equal to 2 mole % and less than or equal to 7 mole %, greater than or equal to 2 mole % and less than or equal to 6.5 mol%, greater than or equal to 2 mol% and less than or equal to 6 mol%, greater than or equal to 2 mol% and less than or equal to 5.5 mol%, greater than or equal to 3 mol% and less than or Equal to 15 mol%, greater than or equal to 3 and less than or equal to 10 mol%, greater than or equal to 3 mol% and less than or equal to 8 mol%, greater than or equal to 3 mol% and less than or equal to 7.5 Mole%, greater than or equal to 3 mole% and less than or equal to 7 mole%, greater than or equal to 3 mole% and less than or equal to 6.5 mole%, greater than or equal to 3 mole% and less than or equal to 6 mol%, greater than or equal to 3 mol% and less than or equal to 5.5 mol%, greater than or equal to 3.5 mol% and less than or equal to 15 mol%, greater than or equal to 3.5 and less than or equal to 10 mol% mol%, greater than or equal to 3.5 mol% and less than or equal to 8 mol%, greater than or equal to 3.5 mol% and less than or equal to 7.5 mol%, greater than or equal to 3.5 mol% and less than or equal to 7 Mole %, greater than or equal to 3.5 mole % and less than or equal to 6.5 mole %, greater than or equal to 3.5 mole % and less than or equal to 6 mole %, greater than or equal to 3.5 mole % and less than or equal to 5.5 mol%, greater than or equal to 4 mol% and less than or equal to 15 mol%, greater than or equal to 4 and less than or equal to 10 mol%, greater than or equal to 4 mol% and less than or equal to 8 mol% mol%, greater than or equal to 4 mol% and less than or equal to 7.5 mol%, greater than or equal to 4 mol% and less than or equal to 7 mol%, greater than or equal to 4 mol% and less than or equal to 6.5 mol%, greater than or equal to 4 mol% and less than or equal to 6 mol%, greater than or equal to 4 mol% and less than or equal to 5.5 mol%, greater than or equal to 4.5 mol% and less than or equal to 15 mol%, greater than or equal to 4.5 and less than or equal to 10 mol%, greater than or equal to 4.5 mol% and less than or equal to 8 mol%, greater than or equal to 4.5 mol% and less than or equal to 7.5 mol% mol%, greater than or equal to 4.5 mol% and less than or equal to 7 mol%, greater than or equal to 4.5 mol% and less than or equal to 6.5 mol%, greater than or equal to 4.5 mol% and less than or equal to 6 mol%, or even greater than or equal to 4.5 mol% and less than or equal to 5.5 mol%, or any and all subranges formed by any of these endpoints.

The glass compositions and resulting colored glass articles described herein may optionally further comprise alkali metal oxides (eg, K ₂ O) other than Li ₂ O and Na ₂ O. When K ₂ O is included, K ₂ O promotes ion exchange and can increase depth of compression and lower melting point to improve formability of colored glass articles. However, adding too much K ₂ O may cause surface compressive stress and low melting point. Therefore, in an embodiment, the amount of K ₂ O added to the glass composition may be limited.

In embodiments, the glass composition and the resulting colored glass article may optionally contain K ₂ O greater than or equal to 0.1 mol % and less than or equal to 1 mol %. In embodiments, the concentration of K ₂ O in the glass composition and the resulting colored glass article may be greater than or equal to 0 mol%, greater than or equal to 0.1 mol%, or even greater than or equal to 0.2 mol%. In embodiments, the concentration of _K2O in the glass composition and the resulting colored glass article may be less than or equal to 1 mol%, less than or equal to 0.5 mol%, or even less than or equal to 0.5 mol%. %. In an embodiment, the concentration of K ₂ O in the glass composition and the resulting colored glass product may be greater than or equal to 0 mol% and less than or equal to 1 mol%, greater than or equal to 0 mol% and less than Or equal to 0.7 mol%, greater than or equal to 0 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.1 mol% and less than or equal to 1 mol%, greater than or equal to 0.1 mol% and less 0.7 mol% or more, 0.1 mol% or more and 0.5 mol% or less, 0.2 mol% or more and 1 mol% or less, 0.2 mol% or more and Less than or equal to 0.7 mol%, or even greater than or equal to 0.2 mol% and less than or equal to 0.5 mol%, or any and all subranges formed by any of these endpoints. In an embodiment, the glass composition and the resulting colored glass article may be substantially free or free of K ₂ O.

The sum of all alkali metal oxides is denoted herein as _R2O . Specifically, R ₂ O is the sum of Li ₂ O, Na ₂ O, and K ₂ O present in the glass composition and the obtained colored glass product (in mole %) (that is, R ₂ O=Li ₂ O (mol %)+Na ₂ O (mol %)+K ₂ O (mol %)). Similar to B ₂ O ₃ , alkali metal oxides help lower the softening point and forming temperature of the glass composition, thereby counteracting _the softening point and increase in molding temperature. The softening point and forming temperature can be further lowered by including a combination of alkali metal oxides (eg, two or more alkali metal oxides) in the glass composition, a phenomenon known as the "mixed alkali effect." However, it has been found that if the amount of alkali metal oxide is too high, the average coefficient of thermal expansion of the glass composition increases to greater than 100 x 10 ^-7 /°C, which may be undesirable.

In an embodiment, the concentration of R ₂ O in the glass composition and the resulting colored glass product may be greater than or equal to 2 mol% and less than or equal to 35 mol%. In an embodiment, the concentration of R ₂ O in the glass composition and the obtained colored glass product may be greater than or equal to 2 mol%, greater than or equal to 4 mol%, greater than or equal to 6 mol%, greater than or equal to 8 mol%. mol%, greater than or equal to 10 mol%, greater than or equal to 12 mol%, or even greater than or equal to 14 mol%. In an embodiment, the concentration of R ₂ O in the glass composition and the resulting colored glass product may be less than or equal to 35 mol%, less than or equal to 30 mol%, less than or equal to 25 mol%, Less than or equal to 20 mol%, less than or equal to 19 mol%, less than or equal to 18 mol%, less than or equal to 17 mol%, or even less than or equal to 16 mol%. In an embodiment, the concentration of R ₂ O in the glass composition and the obtained colored glass product may be greater than or equal to 2 mol % and less than or equal to 35 mol %, greater than or equal to 2 mol % and less than Or equal to 30 mol%, greater than or equal to 2 mol% and less than or equal to 25 mol%, greater than or equal to 2 mol% and less than or equal to 20 mol%, greater than or equal to 2 mol% and less 19 mol% or more, 2 mol% or more and 18 mol% or less, 2 mol% or more and 17 mol% or less, 2 mol% or more and Less than or equal to 16 mol%, greater than or equal to 4 mol% and less than or equal to 35 mol%, greater than or equal to 4 mol% and less than or equal to 30 mol%, greater than or equal to 4 mol% And less than or equal to 25 mol%, greater than or equal to 4 mol% and less than or equal to 20 mol%, greater than or equal to 4 mol% and less than or equal to 19 mol%, greater than or equal to 4 mol% % and less than or equal to 18 mol%, greater than or equal to 4 mol% and less than or equal to 17 mol%, greater than or equal to 4 mol% and less than or equal to 16 mol%, greater than or equal to 6 mol% Mole% and less than or equal to 35 mole%, greater than or equal to 6 mole% and less than or equal to 30 mole%, greater than or equal to 6 mole% and less than or equal to 25 mole%, greater than or equal to 6 Mole% and less than or equal to 20 mole%, greater than or equal to 6 mole% and less than or equal to 19 mole%, greater than or equal to 6 mole% and less than or equal to 18 mole%, greater than or equal to 6 mol% and less than or equal to 17 mol%, greater than or equal to 6 mol% and less than or equal to 16 mol%, greater than or equal to 8 mol% and less than or equal to 35 mol%, greater than or equal to Equal to 8 mol% and less than or equal to 30 mol%, greater than or equal to 8 mol% and less than or equal to 25 mol%, greater than or equal to 8 mol% and less than or equal to 20 mol%, greater than or equal to 8 mol% and less than or equal to 19 mol%, greater than or equal to 8 mol% and less than or equal to 18 mol%, greater than or equal to 8 mol% and less than or equal to 17 mol%, Greater than or equal to 8 mol% and less than or equal to 16 mol%, greater than or equal to 10 mol% and less than or equal to 35 mol%, greater than or equal to 10 mol% and less than or equal to 30 mol% , greater than or equal to 10 mol% and less than or equal to 25 mol%, greater than or equal to 10 mol% and less than or equal to 20 mol%, greater than or equal to 10 mol% and less than or equal to 19 mol% %, greater than or equal to 10 mol% and less than or equal to 18 mol%, greater than or equal to 10 mol% and less than or equal to 17 mol%, greater than or equal to 10 mol% and less than or equal to 16 mol% mol%, greater than or equal to 12 mol% and less than or equal to 35 mol%, greater than or equal to 12 mol% and less than or equal to 30 mol%, greater than or equal to 12 mol% and less than or equal to 25 Mole %, greater than or equal to 12 mole % and less than or equal to 20 mole %, greater than or equal to 12 mole % and less than or equal to 19 mole %, greater than or equal to 12 mole % and less than or equal to 18 mol%, greater than or equal to 12 mol% and less than or equal to 17 mol%, greater than or equal to 12 mol% and less than or equal to 16 mol%, greater than or equal to 14 mol% and less than or Equal to 35 mol%, greater than or equal to 14 mol% and less than or equal to 30 mol%, greater than or equal to 14 mol% and less than or equal to 25 mol%, greater than or equal to 14 mol% and less than Or equal to 20 mol%, greater than or equal to 14 mol% and less than or equal to 19 mol%, greater than or equal to 14 mol% and less than or equal to 18 mol%, greater than or equal to 14 mol% and less Less than or equal to 17 mol %, or even greater than or equal to 14 mol % and less than or equal to 16 mol %, or any and all subranges formed by any of these endpoints.

In an embodiment, the difference between R ₂ O and Al ₂ O ₃ in the glass composition (ie, R ₂ O (mole %)-Al ₂ O ₃ (mole %)) can be adjusted to produce Desired observable color (eg, pink, purple, red, orange, or blue). As a function of temperature and time of thermal processing, the analyzed _R2O - _Al2O3 of the resulting colored glass article may correlate with _the observable color of the colored glass article after thermal processing. In an embodiment, R ₂ O—Al ₂ O ₃ in the glass composition and the obtained colored glass product may be greater than or equal to -3 mol% and less than or equal to 2 mol%. In an embodiment, the R ₂ O—Al ₂ O ₃ in the glass composition and the resulting colored glass product may be greater than or equal to -3 mol%, greater than or equal to -2.5, greater than or equal to -2, or even greater than Or equal to -1.5. In an embodiment, the R ₂ O-Al ₂ O ₃ in the glass composition and the obtained colored glass product may be less than or equal to 2 mol%, less than or equal to 1.5 mol%, less than or equal to 1 mol%. mol%, or even less than or equal to 0.5 mol%. In an embodiment, the R ₂ O-Al ₂ O ₃ in the glass composition and the obtained colored glass product may be greater than or equal to -3 mol% and less than or equal to 2 mol%, greater than or equal to -3 mol%. mol% and less than or equal to 1.5 mol%, greater than or equal to -3 mol% and less than or equal to 1 mol%, greater than or equal to -3 mol% and less than or equal to 0.5 mol%, greater than or equal to Equal to -2.5 mol% and less than or equal to 2 mol%, greater than or equal to -2.5 mol% and less than or equal to 1.5 mol%, greater than or equal to -2.5 mol% and less than or equal to 1 mol% %, greater than or equal to -2.5 mol% and less than or equal to 0.5 mol%, greater than or equal to -2 mol% and less than or equal to 2 mol%, greater than or equal to -2 mol% and less than or Equal to 1.5 mol%, greater than or equal to -2 mol% and less than or equal to 1 mol%, greater than or equal to -2 mol% and less than or equal to 0.5 mol%, greater than or equal to -1.5 mol% and less than or equal to 2 mol%, greater than or equal to -1.5 mol% and less than or equal to 1.5 mol%, greater than or equal to -1.5 mol% and less than or equal to 1 mol%, or even greater than or Equal to -1.5 mol % and less than or equal to 0.5 mol %, or any and all subranges formed by any of these endpoints.

The glass composition and the resulting colored glass article described herein further include MgO and/or ZnO to improve Au retention by lowering the melting point of the glass composition. Lowering the melting point of the glass composition can help improve Au retention because the glass composition can be melted at a relatively low temperature and Au evaporation can be reduced. While not wishing to be bound by theory, it is also believed that partial replacement of _Li2O and/or Na2O with MgO and/or _ZnO may also help improve Au retention. Specifically, Li ₂ O and/or Na ₂ O are included in the batch glass composition as lithium carbonate and sodium carbonate, respectively. After melting the glass composition, carbonate gas is released from the glass composition. Au escapes from the glass composition in the carbonate gas. Therefore, the improved Au retention may be due to the reduced amount of carbonate.

Therefore, in the examples, the sum of MgO and ZnO present in the glass composition and the obtained colored glass product (in mole %) (that is, MgO (mole %) + ZnO (mole %) ) may be greater than or equal to 0.1 mol% and less than or equal to 6 mol%. In an embodiment, the sum of MgO and ZnO in the glass composition and the obtained colored glass product may be greater than or equal to 0.5 mol% and less than or equal to 5.5 mol%. In an embodiment, the sum of MgO and ZnO in the glass composition and the obtained colored glass product may be greater than or equal to 0.1 mol%, greater than or equal to 0.5 mol%, greater than or equal to 1 mol%, greater than or equal to 1.5 mol%, greater than or equal to 2 mol%, greater than or equal to 2.5 mol%, greater than or equal to 3 mol%, or even greater than or equal to 3.5 mol%. In an embodiment, the sum of MgO and ZnO in the glass composition and the obtained colored glass product may be less than or equal to 6 mol%, less than or equal to 5.5 mol%, less than or equal to 5 mol%, Or even less than or equal to 4.5 mol%. In an embodiment, the sum of MgO and ZnO in the glass composition and the obtained colored glass product may be greater than or equal to 0.1 mol% and less than or equal to 6 mol%, greater than or equal to 0.1 mol% and less than or equal to 5.5 mol%, greater than or equal to 0.1 mol% and less than or equal to 5 mol%, greater than or equal to 0.1 mol% and less than or equal to 4.5 mol%, greater than or equal to 0.5 mol% and less 6 mol% or more, 0.5 mol% or more and 5.5 mol% or less, 0.5 mol% or more and 5 mol% or less, 0.5 mol% or more and Less than or equal to 4.5 mol%, greater than or equal to 1 mol% and less than or equal to 6 mol%, greater than or equal to 1 mol% and less than or equal to 5.5 mol%, greater than or equal to 1 mol% And less than or equal to 5 mol%, greater than or equal to 1 mol% and less than or equal to 4.5 mol%, greater than or equal to 1.5 mol% and less than or equal to 6 mol%, greater than or equal to 1.5 mol% % and less than or equal to 5.5 mol%, greater than or equal to 1.5 mol% and less than or equal to 5 mol%, greater than or equal to 1.5 mol% and less than or equal to 4.5 mol%, greater than or equal to 2 mol% mol% and less than or equal to 6 mol%, greater than or equal to 2 mol% and less than or equal to 5.5 mol%, greater than or equal to 2 mol% and less than or equal to 5 mol%, greater than or equal to 2 mol% and less than or equal to 4.5 mol%, greater than or equal to 2.5 mol% and less than or equal to 6 mol%, greater than or equal to 2.5 mol% and less than or equal to 5.5 mol%, greater than or equal to 2.5 mol% and less than or equal to 5 mol%, greater than or equal to 2.5 mol% and less than or equal to 4.5 mol%, greater than or equal to 3 mol% and less than or equal to 6 mol%, greater than or equal to Equal to 3 mol% and less than or equal to 5.5 mol%, greater than or equal to 3 mol% and less than or equal to 5 mol%, greater than or equal to 3 mol% and less than or equal to 4.5 mol%, greater than or equal to 3.5 mol% and less than or equal to 6 mol%, greater than or equal to 3.5 mol% and less than or equal to 5.5 mol%, greater than or equal to 3.5 mol% and less than or equal to 5 mol%, Or even greater than or equal to 3.5 mol % and less than or equal to 4.5 mol %, or any and all subranges formed by any of these endpoints.

In addition to improving Au retention, MgO lowers the viscosity of the glass composition to enhance formability, strain point, and Young's modulus, and can improve ion exchange. However, when too much MgO is added to the glass composition, the diffusivity of sodium ions and potassium ions in the glass composition decreases, which is detrimental to the ion exchange performance (i.e., ion exchangeability) of the obtained colored glass products. Influence.

In an embodiment, the glass composition and the resulting colored glass article may contain MgO greater than or equal to 0 mol % and less than or equal to 8 mol %. In an embodiment, the glass composition and the resulting colored glass article may contain MgO greater than or equal to 0.5 mol % and less than or equal to 7 mol %. In an embodiment, the concentration of MgO in the glass composition may be greater than or equal to 0 mol%, greater than or equal to 0.5 mol%, greater than or equal to 1 mol%, greater than or equal to 1.5 mol%, greater than or equal to 2 Mole %, or even greater than or equal to 2.5 Mole %. In an embodiment, the concentration of MgO in the glass composition may be less than or equal to 8 mol%, less than or equal to 7 mol%, less than or equal to 6 mol%, less than or equal to 5.5 mol%, Less than or equal to 5 mol%, less than or equal to 4.5 mol%, less than or equal to 4 mol%, or even less than or equal to 3.5 mol%. In an embodiment, the concentration of MgO in the glass composition may be greater than or equal to 0 mol% and less than or equal to 8 mol%, greater than or equal to 0 mol% and less than or equal to 7 mol%, greater than or equal to Equal to 0 mol% and less than or equal to 6 mol%, greater than or equal to 0 mol% and less than or equal to 5.5 mol%, greater than or equal to 0 mol% and less than or equal to 5 mol%, greater than or equal to 0 mol% and less than or equal to 4.5 mol%, greater than or equal to 0 mol% and less than or equal to 4 mol%, greater than or equal to 0 mol% and less than or equal to 3.5 mol%, Greater than or equal to 0.5 mol% and less than or equal to 8 mol%, greater than or equal to 0.5 mol% and less than or equal to 7 mol%, greater than or equal to 0.5 mol% and less than or equal to 6 mol% , greater than or equal to 0.5 mol% and less than or equal to 5.5 mol%, greater than or equal to 0.5 mol% and less than or equal to 5 mol%, greater than or equal to 0.5 mol% and less than or equal to 4.5 mol% %, greater than or equal to 0.5 mol% and less than or equal to 4 mol%, greater than or equal to 0.5 mol% and less than or equal to 3.5 mol%, greater than or equal to 1 mol% and less than or equal to 8 mol% mol%, greater than or equal to 1 mol% and less than or equal to 7 mol%, greater than or equal to 1 mol% and less than or equal to 6 mol%, greater than or equal to 1 mol% and less than or equal to 5.5 Mole%, greater than or equal to 1 mole% and less than or equal to 5 mole%, greater than or equal to 1 mole% and less than or equal to 4.5 mole%, greater than or equal to 1 mole% and less than or equal to 4 mol%, greater than or equal to 1 mol% and less than or equal to 3.5 mol%, greater than or equal to 1.5 mol% and less than or equal to 8 mol%, greater than or equal to 1.5 mol% and less than or Equal to 7 mol%, greater than or equal to 1.5 mol% and less than or equal to 6 mol%, greater than or equal to 1.5 mol% and less than or equal to 5.5 mol%, greater than or equal to 1.5 mol% and less Or equal to 5 mol%, greater than or equal to 1.5 mol% and less than or equal to 4.5 mol%, greater than or equal to 1.5 mol% and less than or equal to 4 mol%, greater than or equal to 1.5 mol% and less 3.5 mol% or more, 2 mol% or more and 8 mol% or less, 2 mol% or more and 7 mol% or less, 2 mol% or more and Less than or equal to 6 mol%, greater than or equal to 2 mol% and less than or equal to 5.5 mol%, greater than or equal to 2 mol% and less than or equal to 5 mol%, greater than or equal to 2 mol% And less than or equal to 4.5 mol%, greater than or equal to 2 mol% and less than or equal to 4 mol%, greater than or equal to 2 mol% and less than or equal to 3.5 mol%, greater than or equal to 0 mol% % and less than or equal to 8 mol%, greater than or equal to 2.5 mol% and less than or equal to 7 mol%, greater than or equal to 2.5 mol% and less than or equal to 6 mol%, greater than or equal to 2.5 mol% mol% and less than or equal to 5.5 mol%, greater than or equal to 2.5 mol% and less than or equal to 5 mol%, greater than or equal to 2.5 mol% and less than or equal to 4.5 mol%, greater than or equal to 2.5 mol% and less than or equal to 4 mol%, or even greater than or equal to 2.5 mol% and less than or equal to 3.5 mol%, or any and all subranges formed by any of these endpoints. In embodiments, the glass composition and resulting colored glass article may be substantially free or free of MgO.

In an embodiment, the glass composition and the resulting colored glass article may contain MgO greater than or equal to 0 mol % and less than or equal to 6 mol %. In an embodiment, the glass composition and the resulting colored glass product may contain MgO greater than or equal to 0.1 mol % and less than or equal to 5 mol %. In embodiments, the concentration of MgO in the glass composition may be greater than or equal to 0 mol%, greater than or equal to 0.1 mol%, or even greater than or equal to 0.5 mol%. In an embodiment, the concentration of MgO in the glass composition may be less than or equal to 6 mol%, less than or equal to 5 mol%, less than or equal to 4 mol%, less than or equal to 3 mol%, Less than or equal to 2 mol%, or even less than or equal to 1 mol%. In an embodiment, the concentration of MgO in the glass composition may be greater than or equal to 0 mol% and less than or equal to 6 mol%, greater than or equal to 0 mol% and less than or equal to 5 mol%, greater than or equal to Equal to 0 mol% and less than or equal to 4 mol%, greater than or equal to 0 mol% and less than or equal to 3 mol%, greater than or equal to 0 mol% and less than or equal to 2 mol%, greater than or equal to 0 mol% and less than or equal to 1 mol%, greater than or equal to 0.1 mol% and less than or equal to 6 mol%, greater than or equal to 0.1 mol% and less than or equal to 5 mol%, Greater than or equal to 0.1 mol% and less than or equal to 4 mol%, greater than or equal to 0.1 mol% and less than or equal to 3 mol%, greater than or equal to 0.1 mol% and less than or equal to 2 mol% , greater than or equal to 0.1 mol% and less than or equal to 1 mol%, greater than or equal to 0.5 mol% and less than or equal to 6 mol%, greater than or equal to 0.5 mol% and less than or equal to 5 mol% %, greater than or equal to 0.5 mol% and less than or equal to 4 mol%, greater than or equal to 0.5 mol% and less than or equal to 3 mol%, greater than or equal to 0.5 mol% and less than or equal to 2 mol% mol%, or even greater than or equal to 0.5 mol% and less than or equal to 1 mol%, or any and all subranges formed by any of these endpoints. In embodiments, the glass composition and resulting colored glass article may be substantially free or free of MgO.

In addition to improving Au retention, ZnO reduces the viscosity of the glass composition to enhance formability, strain point, and Young's modulus, and can improve ion exchange properties. However, when too much ZnO is added to the glass composition, the diffusivity of sodium ions and potassium ions in the glass composition decreases, which is detrimental to the ion exchange performance (i.e., ion exchangeability) of the obtained colored glass products. Influence.

In an embodiment, the glass composition and the resulting colored glass article may contain ZnO greater than or equal to 0 mol % and less than or equal to 5 mol %. In an embodiment, the glass composition and the resulting colored glass product may contain ZnO greater than or equal to 0.1 mol % and less than or equal to 4 mol %. In an embodiment, the concentration of ZnO in the glass composition may be greater than or equal to 0 mol%, greater than or equal to 0.1 mol%, greater than or equal to 0.25 mol%, greater than or equal to 0.5 mol%, or even greater than or equal to Equal to 0.75 mole %. In an embodiment, the concentration of ZnO in the glass composition may be less than or equal to 5 mol%, less than or equal to 4 mol%, less than or equal to 3 mol%, less than or equal to 2.5 mol%, Less than or equal to 2 mol%, less than or equal to 1.75 mol%, less than or equal to 1.5 mol%, or even less than or equal to 1.25 mol%. In an embodiment, the concentration of ZnO in the glass composition may be greater than or equal to 0 mol% and less than or equal to 5 mol%, greater than or equal to 0 mol% and less than or equal to 4 mol%, greater than or equal to Equal to 0 mol% and less than or equal to 3 mol%, greater than or equal to 0 mol% and less than or equal to 2.5 mol%, greater than or equal to 0 mol% and less than or equal to 2 mol%, greater than or equal to 0 mol% and less than or equal to 1.75 mol%, greater than or equal to 0 mol% and less than or equal to 1.5 mol%, greater than or equal to 0 mol% and less than or equal to 1.25 mol%, Greater than or equal to 0.1 mol% and less than or equal to 5 mol%, greater than or equal to 0.1 mol% and less than or equal to 4 mol%, greater than or equal to 0.1 mol% and less than or equal to 3 mol% , greater than or equal to 0.1 mol% and less than or equal to 2.5 mol%, greater than or equal to 0.1 mol% and less than or equal to 2 mol%, greater than or equal to 0.1 mol% and less than or equal to 1.75 mol% %, greater than or equal to 0.1 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.1 mol% and less than or equal to 1.25 mol%, greater than or equal to 0.25 mol% and less than or equal to 5 mol% mol%, greater than or equal to 0.25 mol% and less than or equal to 4 mol%, greater than or equal to 0.25 mol% and less than or equal to 3 mol%, greater than or equal to 0.25 mol% and less than or equal to 2.5 mol%, greater than or equal to 0.25 mol% and less than or equal to 2 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.75 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.25 mol%, greater than or equal to 0.5 mol% and less than or equal to 5 mol%, greater than or equal to 0.5 mol% and less than or Equal to 4 mol%, greater than or equal to 0.5 mol% and less than or equal to 3 mol%, greater than or equal to 0.5 mol% and less than or equal to 2.5 mol%, greater than or equal to 0.5 mol% and less or equal to 2 mol%, greater than or equal to 0.5 mol% and less than or equal to 1.75 mol%, greater than or equal to 0.5 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.5 mol% and less 1.25 mol% or more, 0.75 mol% or more and 5 mol% or less, 0.75 mol% or more and 4 mol% or less, 0.75 mol% or more and Less than or equal to 3 mol%, greater than or equal to 0.75 mol% and less than or equal to 2.5 mol%, greater than or equal to 0.75 mol% and less than or equal to 2 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.75 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.5 mol%, or even greater than or equal to 0.75 mol% and less than or equal to 1.25 mol%, or these endpoints Any and all subranges formed by any of them. In embodiments, the glass composition and the resulting colored glass article may be substantially free or free of ZnO.

Similar to ZnO and alkaline earth metal oxide MgO, other alkaline earth metal oxides (eg, CaO, SrO, and BaO) lower the melting point of the glass composition. Therefore, CaO, SrO, and/or BaO may be included in the glass composition and the resulting colored glass product to lower the melting point of the glass composition, which may help improve Au retention.

In an embodiment, the concentration of CaO in the glass composition and the resulting colored glass product may be greater than or equal to 0 mol%, greater than or equal to 0.25 mol%, greater than or equal to 0.5 mol%, or even greater than or equal to 0.75 mol%. In an embodiment, the concentration of CaO in the glass composition and the resulting colored glass product may be less than or equal to 2 mol%, less than or equal to 1.75 mol%, less than or equal to 1.5 mol%, less than or equal to Or equal to 1.25 mol%, or even less than or equal to 1 mol%. In an embodiment, the concentration of CaO in the glass composition and the resulting colored glass product may be greater than or equal to 0 mol% and less than or equal to 2 mol%, greater than or equal to 0 mol% and less than or equal to 1.75 mol%, greater than or equal to 0 mol% and less than or equal to 1.5 mol%, greater than or equal to 0 mol% and less than or equal to 1.25 mol%, greater than or equal to 0 mol% and less than or Equal to 1 mol%, greater than or equal to 0.25 mol% and less than or equal to 2 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.75 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.25 mol%, greater than or equal to 0.25 mol% and less than or equal to 1 mol%, greater than or equal to 0.5 mol% and less 2 mol% or more, 0.5 mol% or more and 1.75 mol% or less, 0.5 mol% or more and 1.5 mol% or less, 0.5 mol% or more and Less than or equal to 1.25 mol%, greater than or equal to 0.5 mol% and less than or equal to 1 mol%, greater than or equal to 0.75 mol% and less than or equal to 2 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.75 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.25 mol%, or even greater than or equal to 0.75 mol% and less than or equal to 1 mol%, or any and all subranges formed by any of these endpoints. In embodiments, the glass composition and the resulting colored glass article may be substantially free or free of CaO.

In an embodiment, the concentration of SrO in the glass composition and the resulting colored glass product may be greater than or equal to 0 mol%, greater than or equal to 0.25 mol%, greater than or equal to 0.5 mol%, or even greater than or equal to 0.75 mol%. In an embodiment, the concentration of SrO in the glass composition and the resulting colored glass product may be less than or equal to 2 mol%, less than or equal to 1.75 mol%, less than or equal to 1.5 mol%, less than or equal to Or equal to 1.25 mol%, or even less than or equal to 1 mol%. In an embodiment, the concentration of SrO in the glass composition and the obtained colored glass product may be greater than or equal to 0 mol% and less than or equal to 2 mol%, greater than or equal to 0 mol% and less than or equal to 1.75 mol%, greater than or equal to 0 mol% and less than or equal to 1.5 mol%, greater than or equal to 0 mol% and less than or equal to 1.25 mol%, greater than or equal to 0 mol% and less than or Equal to 1 mol%, greater than or equal to 0.25 mol% and less than or equal to 2 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.75 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.25 mol%, greater than or equal to 0.25 mol% and less than or equal to 1 mol%, greater than or equal to 0.5 mol% and less 2 mol% or more, 0.5 mol% or more and 1.75 mol% or less, 0.5 mol% or more and 1.5 mol% or less, 0.5 mol% or more and Less than or equal to 1.25 mol%, greater than or equal to 0.5 mol% and less than or equal to 1 mol%, greater than or equal to 0.75 mol% and less than or equal to 2 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.75 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.25 mol%, or even greater than or equal to 0.75 mol% and less than or equal to 1 mol%, or any and all subranges formed by any of these endpoints. In an embodiment, the glass composition and the resulting colored glass article may be substantially free of or free of SrO.

In an embodiment, the concentration of BaO in the glass composition and the resulting colored glass product may be greater than or equal to 0 mol%, greater than or equal to 0.25 mol%, greater than or equal to 0.5 mol%, or even greater than or equal to 0.75 mol%. In an embodiment, the concentration of BaO in the glass composition and the resulting colored glass product may be less than or equal to 2 mol%, less than or equal to 1.75 mol%, less than or equal to 1.5 mol%, less than or equal to Or equal to 1.25 mol%, or even less than or equal to 1 mol%. In an embodiment, the concentration of BaO in the glass composition and the resulting colored glass product may be greater than or equal to 0 mol% and less than or equal to 2 mol%, greater than or equal to 0 mol% and less than or equal to 1.75 mol%, greater than or equal to 0 mol% and less than or equal to 1.5 mol%, greater than or equal to 0 mol% and less than or equal to 1.25 mol%, greater than or equal to 0 mol% and less than or Equal to 1 mol%, greater than or equal to 0.25 mol% and less than or equal to 2 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.75 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.25 mol% and less than or equal to 1.25 mol%, greater than or equal to 0.25 mol% and less than or equal to 1 mol%, greater than or equal to 0.5 mol% and less 2 mol% or more, 0.5 mol% or more and 1.75 mol% or less, 0.5 mol% or more and 1.5 mol% or less, 0.5 mol% or more and Less than or equal to 1.25 mol%, greater than or equal to 0.5 mol% and less than or equal to 1 mol%, greater than or equal to 0.75 mol% and less than or equal to 2 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.75 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.75 mol% and less than or equal to 1.25 mol%, or even greater than or equal to 0.75 mol% and less than or equal to 1 mol%, or any and all subranges formed by any of these endpoints. In embodiments, the glass composition and the resulting colored glass article may be substantially free or free of BaO.

The glass composition described herein and the resulting colored glass product may further contain ZrO ₂ . While not wishing to be bound by theory, it is believed that _ZrO2 may contribute to improved Au retention by acting as a multivalent species, serving as a redox couple to supply oxygen to Au during relatively low-temperature thermal processing. In addition to Au, _ZrO2 can also be used as a colorant to produce colored glass articles which can be red, for example. In an embodiment, the glass composition and the resulting colored glass product may contain ZrO ₂ greater than or equal to 0.1 mol % and less than or equal to 2 mol %. In an embodiment, the glass composition and the resulting colored glass product may contain ZrO ₂ greater than or equal to 0.25 mol % and less than or equal to 1.5 mol %. In embodiments, the concentration of ZrO ₂ in the glass composition may be greater than or equal to 0 mol%, greater than or equal to 0.1 mol%, or even greater than or equal to 0.2 mol%. In an embodiment, the concentration of _ZrO in the glass composition may be less than or equal to 2 mol%, less than or equal to 1.5 mol%, less than or equal to 1 mol%, less than or equal to 0.75 mol% , or even less than or equal to 0.5 mol%. In an embodiment, the concentration of _ZrO in the glass composition may be greater than or equal to 0 mol% and less than or equal to 2 mol%, greater than or equal to 0 mol% and less than or equal to 1.5 mol%, greater than or equal to or equal to 0 mol% and less than or equal to 1 mol%, greater than or equal to 0 mol% and less than or equal to 0.75 mol%, greater than or equal to 0 mol% and less than or equal to 0.5 mol%, Greater than or equal to 0.1 mol% and less than or equal to 2 mol%, greater than or equal to 0.1 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.1 mol% and less than or equal to 1 mol% , greater than or equal to 0.1 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.1 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.2 mol% and less than or equal to 2 mol% %, greater than or equal to 0.2 mol% and less than or equal to 1.5 mol%, greater than or equal to 0.2 mol% and less than or equal to 1 mol%, greater than or equal to 0.2 mol% and less than or equal to 0.75 mol% mol%, or even greater than or equal to 0.2 mol% and less than or equal to 0.5 mol%, or any and all subranges formed by any of these endpoints. In an embodiment, the glass composition and the resulting colored glass article may be substantially free or free of ZrO ₂ .

The glass compositions and resulting colored glass articles described herein may further contain Fe ₂ O ₃ , which may help improve Au retention. The Fe ₂ O ₃ system is a polyvalent species that can serve as a redox couple to supply oxygen to Au during relatively low-temperature thermal processing, thereby contributing to the improvement of Au retention. In addition to Au, _Fe2O3 can also be used as _a colorant to produce colored glass articles which can be, for example, pink. In an embodiment, a glass composition. In an embodiment, the glass composition and the resulting colored glass product may contain Fe ₂ O ₃ greater than or equal to 0.1 mol % and less than or equal to 1 mol %. In an embodiment, the concentration of Fe ₂ O ₃ in the glass composition may be greater than or equal to 0 mol%, or even greater than or equal to 0.1 mol%. In embodiments, the concentration of _Fe2O3 in the glass composition may be less _than or equal to 1 mol%, less than or equal to 0.75 mol%, or even less than or equal to 0.5 mol%. In an embodiment, the concentration of _Fe2O3 in the glass composition may be greater than or equal to 0 mol % and _less than or equal to 1 mol %, greater than or equal to 0 mol % and less than or equal to 0.75 mol % , greater than or equal to 0 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.1 mol% and less than or equal to 1 mol%, greater than or equal to 0.1 mol% and less than or equal to 0.75 mol% %, or even greater than or equal to 0.1 mol % and less than or equal to 0.5 mol %, or any and all subranges formed by any of these endpoints. In an embodiment, the glass composition and the resulting colored glass article may be substantially free or free of Fe ₂ O ₃ .

The glass composition described herein and the obtained colored glass product may further contain SnO ₂ , Sb ₂ O ₃ , and/or Bi ₂ O ₃ . Similar to MgO and ZnO, SnO ₂ , Sb ₂ O ₃ , and Bi ₂ O ₃ may help lower the melting point of the glass composition. Therefore, SnO ₂ , Sb ₂ O ₃ , and/or Bi ₂ O ₃ may be included in the glass composition and the resulting colored glass product to lower the melting point and improve Au retention.

In an embodiment, the glass composition and the resulting colored glass product may contain SnO ₂ greater than or equal to 0.01 mol % and less than or equal to 1 mol %. In an embodiment, the glass composition and the resulting colored glass article may contain SnO ₂ greater than or equal to 0.05 mol % and less than or equal to 0.75 mol %. In an embodiment, the glass composition and the resulting colored glass product may have a concentration of SnO ₂ greater than or equal to 0 mol%, greater than or equal to 0.01 mol%, greater than or equal to 0.05 mol%, or even greater than or equal to Equal to 0.1 mol%. In embodiments, the concentration of _SnO in the glass composition and the resulting colored glass article may be less than or equal to 1 mol%, less than or equal to 0.75 mol%, less than or equal to 0.5 mol%, or Even less than or equal to 0.25 mole %. In an embodiment, the concentration of _SnO in the glass composition and the resulting colored glass product may be greater than or equal to 0 mol% and less than or equal to 1 mol%, greater than or equal to 0 mol% and less than or equal to Equal to 0.75 mol%, greater than or equal to 0 mol% and less than or equal to 0.5 mol%, greater than or equal to 0 mol% and less than or equal to 0.25 mol%, greater than or equal to 0.01 mol% and less than or equal to 1 mol%, greater than or equal to 0.01 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.01 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.01 mol% and less Less than or equal to 0.25 mol%, greater than or equal to 0.05 mol% and less than or equal to 1 mol%, greater than or equal to 0.05 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.05 mol% and Less than or equal to 0.5 mol%, greater than or equal to 0.05 mol% and less than or equal to 0.25 mol%, greater than or equal to 0.1 mol% and less than or equal to 1 mol%, greater than or equal to 0.1 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.1 mol% and less than or equal to 0.5 mol%, or even greater than or equal to 0.1 mol% and less than or equal to 0.25 mol%, or these endpoints Any and all subranges formed by any of them. In embodiments, the glass composition and the resulting colored glass article may be substantially free or free of SnO ₂ .

In an embodiment, the concentration of Sb ₂ O ₃ in the glass composition and the resulting colored glass product may be greater than or equal to 0 mol%, greater than or equal to 0.01 mol%, greater than or equal to 0.05 mol%, or even Greater than or equal to 0.1 mol%. In an embodiment, the concentration of Sb ₂ O ₃ in the glass composition and the resulting colored glass product may be less than or equal to 1 mol%, less than or equal to 0.75 mol%, less than or equal to 0.5 mol% , or even less than or equal to 0.25 mol%. In an embodiment, the concentration of Sb ₂ O ₃ in the glass composition and the resulting colored glass product may be greater than or equal to 0 mol% and less than or equal to 1 mol%, greater than or equal to 0 mol% and less 0.75 mol% or more, 0 mol% or more and 0.5 mol% or less, 0 mol% or more and 0.25 mol% or less, 0.01 mol% or more and Less than or equal to 1 mol%, greater than or equal to 0.01 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.01 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.01 mol% And less than or equal to 0.25 mol%, greater than or equal to 0.05 mol% and less than or equal to 1 mol%, greater than or equal to 0.05 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.05 mol% % and less than or equal to 0.5 mol%, greater than or equal to 0.05 mol% and less than or equal to 0.25 mol%, greater than or equal to 0.1 mol% and less than or equal to 1 mol%, greater than or equal to 0.1 mol% mol% and less than or equal to 0.75 mol%, greater than or equal to 0.1 mol% and less than or equal to 0.5 mol%, or even greater than or equal to 0.1 mol% and less than or equal to 0.25 mol%, or these Any and all subranges formed by any of the endpoints. In an embodiment, the glass composition and the resulting colored glass article may be substantially free of or free of Sb ₂ O ₃ .

In an embodiment, the concentration of _Bi2O3 in the glass composition and _the resulting colored glass product may be greater than or equal to 0 mol%, greater than or equal to 0.01 mol%, greater than or equal to 0.05 mol%, or even Greater than or equal to 0.1 mol%. In an embodiment, the concentration of Bi ₂ O ₃ in the glass composition and the resulting colored glass product may be less than or equal to 1 mol%, less than or equal to 0.75 mol%, less than or equal to 0.5 mol% , or even less than or equal to 0.25 mol%. In an embodiment, the concentration of Bi ₂ O ₃ in the glass composition and the obtained colored glass product may be greater than or equal to 0 mol% and less than or equal to 1 mol%, greater than or equal to 0 mol% and less 0.75 mol% or more, 0 mol% or more and 0.5 mol% or less, 0 mol% or more and 0.25 mol% or less, 0.01 mol% or more and Less than or equal to 1 mol%, greater than or equal to 0.01 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.01 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.01 mol% And less than or equal to 0.25 mol%, greater than or equal to 0.05 mol% and less than or equal to 1 mol%, greater than or equal to 0.05 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.05 mol% % and less than or equal to 0.5 mol%, greater than or equal to 0.05 mol% and less than or equal to 0.25 mol%, greater than or equal to 0.1 mol% and less than or equal to 1 mol%, greater than or equal to 0.1 mol% mol% and less than or equal to 0.75 mol%, greater than or equal to 0.1 mol% and less than or equal to 0.5 mol%, or even greater than or equal to 0.1 mol% and less than or equal to 0.25 mol%, or these Any and all subranges formed by any of the endpoints. In an embodiment, the glass composition and the resulting colored glass article may be substantially free of or free of Bi ₂ O ₃ .

The glass compositions and resulting colored glass articles _described herein may further comprise reduced concentrations of _P2O5 , or be _{substantially} free or free of _P2O5 . Increased concentrations of P ₂ O ₅ (ie, greater than 1 molar %) can reduce Au retention. While not wishing to be bound by theory, it is believed that P ₂ O ₅ may be more volatile than other glass network formers (eg, SiO ₂ ), possibly resulting in reduced Au retention. In an embodiment, the glass composition and the resulting colored glass product may contain P ₂ O ₅ greater than or equal to 0.1 mol % and less than or equal to 1 mol %. In an embodiment, the concentration of _P2O5 in the glass composition and _the resulting colored glass product may be greater than or equal to 0 mol%, greater than or equal to 0.1 mol%, greater than or equal to 0.25 mol%, or even Greater than or equal to 0.5 mol%. In embodiments, the concentration of P ₂ O ₅ in the glass composition and the resulting colored glass article may be less than or equal to 1 mol%, or even less than or equal to 0.75 mol%. In an embodiment, the concentration of _P2O5 in the glass composition and the resulting colored glass product may be greater than or equal to 0 mol% and _less than or equal to 1 mol%, greater than or equal to 0 mol% and less 0.75 mol% or more, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.75 mol% or less, 0.25 mol% or more and Less than or equal to 1 mol%, greater than or equal to 0.25 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.5 mol% and less than or equal to 1 mol%, or even greater than or equal to 0.5 mol% mol% and less than or equal to 0.75 mol%, or any and all subranges formed by any of these endpoints. In an embodiment, the glass composition and the resulting colored glass article may be substantially free of or free of P ₂ O ₅ .

The glass composition and the obtained colored glass product further contain Au as a colorant in order to realize a desired color. As described herein, the glass compositions described herein and the resulting colored glass articles improve Au retention, thereby expanding the color gamut that can be achieved by the resulting colored glass articles.

In an embodiment, the glass composition and the resulting colored glass article may contain Au greater than 0.0005 mol % and less than or equal to 1 mol %. In an embodiment, the glass composition and the resulting colored glass article may contain Au greater than 0.001 mol % and less than or equal to 0.5 mol %. In an embodiment, the concentration of Au in the glass composition and the resulting colored glass product may be greater than or equal to 0.0005 mol%, greater than or equal to 0.001 mol%, greater than or equal to 0.002 mol% of Au, greater than or equal to 0.005 mol%, or even greater than or equal to 0.01 mol%. In an embodiment, the concentration of Au in the glass composition and the resulting colored glass product may be less than or equal to 1 mol%, less than or equal to 0.75 mol%, less than or equal to 0.5 mol%, less than or equal to Or equal to 0.25 mol%, less than or equal to 0.1 mol%, or even less than or equal to 0.05 mol%. In an embodiment, the concentration of Au in the glass composition and the resulting colored glass product may be greater than or equal to 0.0005 mol% and less than or equal to 1 mol%, greater than or equal to 0.0005 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.0005 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.0005 mol% and less than or equal to 0.25 mol%, greater than or equal to 0.0005 mol% and less than or Equal to 0.1 mol%, greater than or equal to 0.0005 mol% and less than or equal to 0.05 mol%, greater than or equal to 0.001 mol% and less than or equal to 1 mol%, greater than or equal to 0.001 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.001 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.001 mol% and less than or equal to 0.25 mol%, greater than or equal to 0.001 mol% and less less than or equal to 0.1 mol%, greater than or equal to 0.001 mol% and less than or equal to 0.05 mol%, greater than or equal to 0.002 mol% and less than or equal to 1 mol%, greater than or equal to 0.002 mol% and Less than or equal to 0.75 mol%, greater than or equal to 0.002 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.002 mol% and less than or equal to 0.25 mol%, greater than or equal to 0.002 mol% And less than or equal to 0.1 mol%, greater than or equal to 0.002 mol% and less than or equal to 0.05 mol%, greater than or equal to 0.005 mol% and less than or equal to 1 mol%, greater than or equal to 0.005 mol% % and less than or equal to 0.75 mol%, greater than or equal to 0.005 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.005 mol% and less than or equal to 0.25 mol%, greater than or equal to 0.005 mol% mol% and less than or equal to 0.1 mol%, greater than or equal to 0.005 mol% and less than or equal to 0.05 mol%, greater than or equal to 0.01 mol% and less than or equal to 1 mol%, greater than or equal to 0.01 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.01 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.01 mol% and less than or equal to 0.25 mol%, greater than or equal to 0.01 mol % and less than or equal to 0.1 mol %, or even greater than or equal to 0.01 mol % and less than or equal to 0.05 mol %, or any and all subranges formed by these endpoints.

In an embodiment, the glass composition and the resulting colored glass article may contain Au greater than or equal to 1×10 ⁻⁶ mol % and less than or equal to 1 mol %. In an embodiment, the glass composition and the resulting colored glass product may contain Au greater than or equal to 1×10 ⁻⁶ mol % and less than or equal to 0.01 mol %. In an embodiment, the concentration of Au in the glass composition and the obtained colored glass product may be greater than or equal to 1×10 ^-6 mol %, greater than or equal to 1 × 10 ^-5 mol %, greater than or equal to 0.0001 mol % mol%, greater than or equal to 0.0005 mol%, or even greater than or equal to 0.001 mol%. In an embodiment, the concentration of Au in the glass composition and the resulting colored glass product may be less than or equal to 1 mol%, less than or equal to 0.75 mol%, less than or equal to 0.5 mol%, less than or equal to Or equal to 0.25 mole%, less than or equal to 0.1 mole%, less than or equal to 0.05 mole%, or even less than or equal to 0.01. In an embodiment, the concentration of Au in the glass composition and the obtained colored glass product may be greater than or equal to 1×10 ^-6 mol % and less than or equal to 0.75 mol %, greater than or equal to 1 × 10 ^-6 Mole% and less than or equal to 0.5 mole%, greater than or equal to 1× ^10-6 mole% and less than or equal to 0.25 mole%, greater than or equal to 1× ^10-6 mole% and less than or equal to 0.1 mol%, greater than or equal to 1×10 ^-6 mol% and less than or equal to 0.05 mol%, greater than or equal to 1×10 ^-6 mol% and less than or equal to 0.01 mol%, greater than or equal to 1×10 ^-5 mol% and less than or equal to 1 mol%, greater than or equal to 1×10 ^-5 mol% and less than or equal to 0.75 mol%, greater than or equal to 1×10 ^-5 mol% and less than or equal to 0.5 mol%, greater than or equal to 1×10 ^-5 mol% and less than or equal to 0.25 mol%, greater than or equal to 1×10 ^-5 mol% and less than or equal to 0.1 mol% %, greater than or equal to 1×10 ^-5 mol% and less than or equal to 0.05 mol%, greater than or equal to 1×10 ^-5 mol% and less than or equal to 0.01 mol%, greater than or equal to 0.0001 mol% % and less than or equal to 1 mol%, greater than or equal to 0.0001 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.0001 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.0001 mol% Mole% and less than or equal to 0.25 mole%, greater than or equal to 0.0001 mole% and less than or equal to 0.1 mole%, greater than or equal to 0.0001 mole% and less than or equal to 0.05 mole%, greater than or equal to 0.0001 Mole% and less than or equal to 0.01 mole%, greater than or equal to 0.0005 mole% and less than or equal to 1 mole%, greater than or equal to 0.0005 mole% and less than or equal to 0.75 mole%, greater than or equal to 0.0005 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.0005 mol% and less than or equal to 0.25 mol%, greater than or equal to 0.0005 mol% and less than or equal to 0.1 mol%, greater than or equal to Equal to 0.0005 mol% and less than or equal to 0.05 mol%, greater than or equal to 0.0005 mol% and less than or equal to 0.01 mol%, greater than or equal to 0.001 mol% and less than or equal to 1 mol%, greater than or equal to 0.001 mol% and less than or equal to 0.75 mol%, greater than or equal to 0.001 mol% and less than or equal to 0.5 mol%, greater than or equal to 0.001 mol% and less than or equal to 0.25 mol%, Greater than or equal to 0.001 mol% and less than or equal to 0.1 mol%, greater than or equal to 0.001 mol% and less than or equal to 0.05 mol%, or even greater than or equal to 0.001 mol% and less than or equal to 0.01 mol% %, or any and all subranges formed by any of these endpoints.

Different color gamuts can be achieved by including other colorants besides Au. Therefore, in an embodiment, the glass composition and the resulting colored glass article may comprise a glass composition comprising greater than or equal to 0 mole % and less than or equal to 1 mole % of the cation "M", Where "M" is F, Cl, Br, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Se, Nb, Mo, Ru, Rh, Pd, Ag, Cd, In, Te, W, At least one of Ir, Pt, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, and Er.

In an embodiment, the glass composition described herein and the resulting colored glass product may further include impurity materials (for example, TiO ₂ , MnO, MoO ₃ , WO ₃ , Y ₂ O ₃ , CdO, As ₂ O ₃ , sulfur-based compounds (eg, sulfates), halogens, or combinations thereof). In an embodiment, the glass composition and the resulting colored glass article may be substantially free or free of impurity materials (for example, TiO ₂ , MnO, MoO ₃ , WO ₃ , Y ₂ O ₃ , CdO, As ₂ O ₃ , sulfur-based compounds (eg, sulfates), halogens, or combinations thereof). In embodiments, antimicrobial ingredients, chemical clarifying agents, or other additional ingredients may be included in the glass compositions and resulting colored glass articles.

As described herein, lowering the melting point of the glass composition can help improve Au retention because the glass composition can melt at a relatively lower temperature and can reduce Au evaporation. Therefore, the glass composition described herein and the resulting colored glass product include MgO and/or ZnO, which helps to lower the melting point of the glass composition. B ₂ O ₃ , Li ₂ O, and Na ₂ O also lower the melting point of the glass composition. As described herein, other ingredients may be added to the glass composition to lower its melting point (eg, SnO ₂ , Sb ₂ O ₃ , and Bi ₂ O ₃ ). In embodiments, the glass composition may have a melting point of less than or equal to 1550°C. In embodiments, the melting point of the glass composition may be greater than or equal to 1300°C, greater than or equal to 1325°C, greater than or equal to 1350°C, greater than or equal to 1375°C, or even greater than or equal to 1400°C. In embodiments, the melting point of the glass composition may be less than or equal to 1550°C, less than or equal to 1525°C, less than or equal to 1500°C, less than or equal to 1475°C, or even less than or equal to 1450°C. In an embodiment, the melting point of the glass composition may be greater than or equal to 1300°C and less than or equal to 1550°C, greater than or equal to 1300°C and less than or equal to 1525°C, greater than or equal to 1300°C and less than or equal to 1500°C, Greater than or equal to 1300°C and less than or equal to 1475°C, greater than or equal to 1300°C and less than or equal to 1450°C, greater than or equal to 1325°C and less than or equal to 1550°C, greater than or equal to 1325°C and less than or equal to 1525 °C, greater than or equal to 1325 °C and less than or equal to 1500 °C, greater than or equal to 1325 °C and less than or equal to 1475 °C, greater than or equal to 1325 °C and less than or equal to 1450 °C, greater than or equal to 1350 °C and less than or Equal to 1550°C, greater than or equal to 1350°C and less than or equal to 1525°C, greater than or equal to 1350°C and less than or equal to 1500°C, greater than or equal to 1350°C and less than or equal to 1475°C, greater than or equal to 1350°C and less At or equal to 1450°C, greater than or equal to 1375°C and less than or equal to 1550°C, greater than or equal to 1375°C and less than or equal to 1525°C, greater than or equal to 1375°C and less than or equal to 1500°C, greater than or equal to 1375°C And less than or equal to 1475°C, greater than or equal to 1375°C and less than or equal to 1450°C, greater than or equal to 1400°C and less than or equal to 1550°C, greater than or equal to 1400°C and less than or equal to 1525°C, greater than or equal to 1400°C and less than or equal to 1500°C, greater than or equal to 1400°C and less than or equal to 1475°C, or even greater than or equal to 1400°C and less than or equal to 1450°C, or any of these endpoints Any and all subranges.

In embodiments, the liquidus temperature of the glass composition may be greater than or equal to 1000°C, greater than or equal to 1050°C, or even greater than or equal to 1100°C. In embodiments, the liquidus temperature of the precursor glass composition may be less than or equal to 1400°C, less than or equal to 1350°C, or even less than or equal to 1300°C. In an embodiment, the liquidus temperature of the glass composition may be greater than or equal to 1000°C and less than or equal to 1400°C, greater than or equal to 1000°C and less than or equal to 1350°C, greater than or equal to 1000°C and less than or equal to 1300°C, greater than or equal to 1050°C and less than or equal to 1400°C, greater than or equal to 1050°C and less than or equal to 1350°C, greater than or equal to 1000°C and less than or equal to 1300°C, greater than or equal to 1100°C and less or equal to 1400°C, greater than or equal to 1100°C and less than or equal to 1350°C, or even greater than or equal to 1100°C and less than or equal to 1300°C, or any and all subranges formed by any of these endpoints .

In embodiments, the viscosity of the glass composition may be adjusted to prevent devitrification of the glass composition and formation of Au particles prior to melting. The formation of Au particles prior to melting may limit the color gamut achievable by thermal processing. Therefore, in an embodiment, in order to achieve the desired viscosity and thereby prevent the formation of Au particles before melting, the glass composition described herein and the resulting glass product can satisfy the relationship 5.72*Al ₂ O ₃ (Mo Mole %)-21.4*ZnO (Mole %)-2.5*P ₂ O ₅ (Mole %)-35*Li ₂ O (Mole %)-16.6*B ₂ O ₃ (Mole %)-20.5* MgO (Mole%)-23.3*Na ₂ O (Mole%)-27.9*SrO (Mole%)-18.5*K ₂ O (Mole%)-26.3*CaO (Mole%) is greater than -609 Mole %. In an embodiment, the glass composition described herein and the obtained glass product can satisfy the relational formula 5.72*Al ₂ O ₃ (mole %)-21.4*ZnO (mole %)-2.5*P ₂ O ₅ ( Mole %)-35*Li ₂ O (Mole %)-16.6*B ₂ O ₃ (Mole %)-20.5*MgO (Mole %)-23.3*Na ₂ O (Mole %)-27.9* SrO (Mole%)-18.5*K ₂ O (Mole%)-26.3*CaO (Mole%) is greater than -609 Mole%, greater than or equal to -575 Mole%, greater than or equal to -550 Mole %, or even greater than or equal to -525 mole %. In an embodiment, the glass composition described herein and the obtained glass product can satisfy the relational formula 5.72*Al ₂ O ₃ (mole %)-21.4*ZnO (mole %)-2.5*P ₂ O ₅ ( Mole %)-35*Li ₂ O (Mole %)-16.6*B ₂ O ₃ (Mole %)-20.5*MgO (Mole %)-23.3*Na ₂ O (Mole %)-27.9* SrO (mol%)-18.5*K ₂ O (mol%)-26.3*CaO (mol%) is less than or equal to -400 mol%, less than or equal to -425 mol%, or even at least Less than or equal to -450 mol%. In an embodiment, the glass composition described herein and the obtained glass product can satisfy the relational formula 5.72*Al ₂ O ₃ (mole %)-21.4*ZnO (mole %)-2.5*P ₂ O ₅ ( Mole %)-35*Li ₂ O (Mole %)-16.6*B ₂ O ₃ (Mole %)-20.5*MgO (Mole %)-23.3*Na ₂ O (Mole %)-27.9* SrO (Mole%)-18.5*K ₂ O (Mole%)-26.3*CaO (Mole%) is greater than -609 Mole% and less than or equal to -400 Mole%, greater than -609 Mole% And less than or equal to -425 mol%, greater than -609 mol% and less than or equal to -450 mol%, greater than or equal to -575 mol% and less than or equal to -400 mol%, greater than or equal to -575 mol% and less than or equal to -425 mol%, greater than or equal to -575 mol% and less than or equal to -450 mol%, greater than or equal to -550 mol% and less than or equal to -400 Mole %, greater than or equal to -550 mole % and less than or equal to -425 mole %, greater than or equal to -550 mole % and less than or equal to -450 mole %, greater than or equal to -525 mole % and less than or equal to -400 mol%, greater than or equal to -525 mol% and less than or equal to -425 mol%, or even greater than or equal to -525 mol% and less than or equal to -450 mol% , or any and all subranges formed by any of these endpoints.

In an embodiment, a method for making a glass article comprises the step of thermally processing a glass composition described herein at one or more preselected temperatures for one or more preselected periods of time to induce Homogenize the glass. In an embodiment, the thermal processing for manufacturing a glass product may include: (i) heating the glass composition to the glass homogenization temperature at a rate of 1-100° C./min; (ii) heating the glass composition to the glass homogenization temperature maintaining the temperature for a period of greater than or equal to 0.25 hours and less than or equal to 4 hours to produce a glass article; and (iii) cooling the formed glass article to room temperature. In an embodiment, the glass homogenization temperature may be greater than or equal to 300°C and less than or equal to 700°C.

Tinted glass articles formed from the glass compositions described herein can be of any suitable thickness, which can vary depending on the particular application of the colored glass article. In an embodiment, the thickness of the colored glass article may be greater than or equal to 250 μm and less than or equal to 6 mm, greater than or equal to 250 μm and less than or equal to 4 mm, greater than or equal to 250 μm and less than or equal to 2 mm, greater than or equal to 250 μm and less Less than or equal to 1 mm, greater than or equal to 250 μm and less than or equal to 750 μm, greater than or equal to 250 μm and less than or equal to 500 μm, greater than or equal to 500 μm and less than or equal to 6 mm, greater than or equal to 500 μm and less than or equal to 4 mm, greater than or equal to 500 μm and less than or equal to 2 mm, greater than or equal to 500 μm and less than or equal to 1 mm, greater than or equal to 500 μm and less than or equal to 750 μm, greater than or equal to 750 μm and less than or equal to 6 mm, greater than or equal to 750 μm and less or equal to 4mm, greater than or equal to 750μm and less than or equal to 2mm, greater than or equal to 750μm and less than or equal to 1mm, greater than or equal to 1mm and less than or equal to 6mm, greater than or equal to 1mm and less than or equal to 4mm, greater than or equal to Equal to 1 mm and less than or equal to 2 mm, greater than or equal to 2 mm and less than or equal to 6 mm, greater than or equal to 2 mm and less than or equal to 4 mm, or even greater than or equal to 4 mm and less than or equal to 6 mm, or one of these endpoints Any and all subranges formed by either.

As noted above, colored glass articles formed from the glass compositions described herein can have increased fracture toughness, making the colored glass articles more resistant to damage. In an embodiment, the colored glass article may have a K _Ic fracture toughness measured by the double twist method of greater than or equal to 0.7 MPa·m ^1/2 . In an embodiment, the K _Ic fracture toughness of the colored glass product measured by the double twist method may be greater than or equal to 0.7 MPa·m ^1/2 , greater than or equal to 0.8 MPa·m ^1/2 , greater than or equal to 0.9 MPa·m ^{1 /2} , or even greater than or equal to 1.0 MPa·m ^1/2 .

In embodiments, the glass compositions described herein are ion-exchangeable to facilitate strengthening colored glass articles made from the glass compositions. In a typical ion exchange process, the smaller metals in the glass composition are replaced or "exchanged" with larger metal ions of the same valence in a layer near the outer surface of a colored glass article made from the glass composition ion. Replacing smaller ions with larger ions creates compressive stress within the layers of a colored glass article made from the glass composition. In an embodiment, the metal ion system is a monovalent metal ion (for example, Li ⁺ , Na ⁺ , K ⁺ , and the like), and is used to replace the colored glass product by immersing a glass product made of the glass composition into a ion exchange in a bath of at least one molten salt of larger metal ions in smaller metal ions. Alternatively, other monovalent ions (eg, Ag ⁺ , Tl ⁺ , Cu ⁺ , and the like) can be exchanged for monovalent ions. One or more ion exchange treatments for strengthening colored glass articles made from glass compositions may include contacting the colored glass articles with an ion exchange medium. In an embodiment, the ion exchange medium may be a molten salt bath. For example, ion exchange treatment may include, but is not limited to, immersion in a single bath or multiple baths of similar or different composition, with optional washing and/or annealing steps between immersions.

After exposure to colored glassware, the temperature of the ion exchange solution (eg, _KNO3 and/or _NaNO3 molten salt bath) may be greater than or equal to 350°C and less than or equal to 500°C, greater than or equal to 360°C, according to embodiments And less than or equal to 450°C, greater than or equal to 370°C and less than or equal to 440°C, greater than or equal to 360°C and less than or equal to 420°C, greater than or equal to 370°C and less than or equal to 400°C, greater than or equal to 375°C and less than or equal to 475°C, greater than or equal to 400°C and less than or equal to 500°C, greater than or equal to 410°C and less than or equal to 490°C, greater than or equal to 420°C and less than or equal to 480°C, greater than Or equal to 430°C and less than or equal to 470°C, or even greater than or equal to 440°C and less than or equal to 460°C, or any and all subranges between the foregoing values. In embodiments, the duration of exposure of the colored glass article to the ion exchange solution may be greater than or equal to 2 hours and less than or equal to 24 hours, greater than or equal to 2 hours and less than or equal to 12 hours, greater than or equal to 2 hours and less than Less than or equal to 6 hours, greater than or equal to 8 hours and less than or equal to 24 hours, greater than or equal to 6 hours and less than or equal to 24 hours, greater than or equal to 6 hours and less than or equal to 12 hours, greater than or equal to 8 hours and less than or equal to 24 hours, or even greater than or equal to 8 hours and less than or equal to 12 hours, or any and all subranges formed by any of these endpoints.

In an embodiment, the colored glass article made of the glass composition may have a compression depth of 10 μm or greater, 20 μm or greater, 30 μm or greater, 40 μm or greater, 50 μm or greater, 60 μm or more, 70 μm or more, 80 μm or more, 90 μm or more, or 100 μm or more. In embodiments, colored glass articles made from the glass composition may be ion-exchanged to achieve a depth of compression of 3 μm or greater or 5 μm or greater. In an embodiment, the colored glass article made of the glass composition may have a thickness "t", and the compression depth achieved by ion exchange may be greater than or equal to 0.15t, greater than or equal to 0.17t, or even greater than or equal to 0.2t. In an embodiment, the colored glass article made of the glass composition may have a thickness "t", and the depth of compression achieved by ion exchange may be less than or equal to 0.3t, less than or equal to 0.27t, or even at least greater than or equal to 0.25t. In an embodiment, the colored glass article made of the glass composition described herein may have a thickness "t", and the compression depth achieved by ion exchange may be greater than or equal to 0.15t and less than or equal to 0.3t, Greater than or equal to 0.15t and less than or equal to 0.27t, greater than or equal to 0.15t and less than or equal to 0.25t, greater than or equal to 0.17t and less than or equal to 0.3t, greater than or equal to 0.17t and less than or equal to 0.27 t, greater than or equal to 0.17t and less than or equal to 0.25t, greater than or equal to 0.2t and less than or equal to 0.3t, greater than or equal to 0.2t and less than or equal to 0.27t, or even greater than or equal to 0.2t and less At or equal to 0.25t, or any and all subranges formed by any of these endpoints.

The development of this surface compressive layer facilitates better crack resistance and higher flexural strength compared to non-ion exchange materials. The surface compression layer has a higher concentration of ions exchanged into the colored glass article than the concentration of ions exchanged into the colored glass article for the bulk of the colored glass article (ie, not including the region of surface compression). In an embodiment, the surface compressive stress of the colored glass article made of the glass composition after ion exchange strengthening may be greater than or equal to 300 MPa, greater than or equal to 400 MPa, greater than or equal to 500 MPa, or even greater than or equal to 600 MPa. In an embodiment, the surface compressive stress of the colored glass article made of the glass composition after ion exchange strengthening may be less than or equal to 1 GPa, less than or equal to 900 MPa, or even less than or equal to 800 MPa. In an embodiment, the surface compressive stress of the colored glass product made of the glass composition after ion exchange strengthening may be greater than or equal to 300 MPa and less than or equal to 1 GPa, greater than or equal to 300 MPa and less than or equal to 900 MPa, greater than or equal to Equal to 300MPa and less than or equal to 800MPa, greater than or equal to 400MPa and less than or equal to 1GPa, greater than or equal to 400MPa and less than or equal to 900MPa, greater than or equal to 400MPa and less than or equal to 800MPa, greater than or equal to 500MPa and less than or Equal to 1GPa, greater than or equal to 500MPa and less than or equal to 900MPa, greater than or equal to 500MPa and less than or equal to 800MPa, greater than or equal to 600MPa and less than or equal to 1GPa, greater than or equal to 600MPa and less than or equal to 900MPa, greater than or equal to Equal to 600MPa and less than or equal to 800MPa.

In an embodiment, the central tension of the colored glass article made of the glass composition after ion exchange strengthening may be greater than or equal to 40 MPa, greater than or equal to 60 MPa, greater than or equal to 80 MPa, or even greater than or equal to 100 MPa. In an embodiment, the central tension of the colored glass article made of the glass composition after ion exchange strengthening may be less than or equal to 250 MPa, less than or equal to 200 MPa, or even less than or equal to 150 MPa. In an embodiment, the central tension of the colored glass product made of the glass composition after ion exchange strengthening may be greater than or equal to 40 MPa and less than or equal to 250 MPa, greater than or equal to 40 MPa and less than or equal to 200 MPa, greater than or equal to 40MPa and less than or equal to 150MPa, greater than or equal to 60MPa and less than or equal to 250MPa, greater than or equal to 60MPa and less than or equal to 200MPa, greater than or equal to 60MPa and less than or equal to 150MPa, greater than or equal to 80MPa and less than or equal to 250MPa, greater than or equal to 80MPa and less than or equal to 200MPa, greater than or equal to 80MPa and less than or equal to 150MPa, greater than or equal to 100MPa and less than or equal to 250MPa, greater than or equal to 100MPa and less than or equal to 200MPa, or even greater than or equal to equal to 100 MPa and less than or equal to 150 MPa, or any and all subranges formed by any of these endpoints. As used herein, unless otherwise stated, central tension refers to the maximum central tension value.

As described herein, the glass compositions described herein increase the retention of Au, thereby increasing the concentration of Au in the resulting colored glass article, thereby expanding the color gamut that can be achieved by the colored glass article. In an embodiment, a colored glass article having greater than or equal to 0.01 mol % and less than or equal to 1 mol % Au may have a CIELAB measured at an article thickness of 1.5 mm under F2 illumination and 10° standard observer angle Transmission color coordinates in color space where L* is greater than or equal to 65 and less than or equal to 97, a* is greater than or equal to -5 and less than or equal to 25, and b* is greater than or equal to -20 and less than or equal to 5. In an embodiment, a colored glass article having greater than or equal to 1 x 10 ^-6 mol % and less than or equal to 1 mol % Au may have an article size of 1.33 mm under F2 illumination and 10° standard observer angle Transmission color coordinates in the CIELAB color space for thickness measurements, where L* is greater than or equal to 65 and less than or equal to 98, a* is greater than or equal to -10 and less than or equal to 25, and b* is greater than or equal to - 20 and less than or equal to 5.

In an embodiment, the glass composition and the resulting colored glass product may include: greater than or equal to 60 mol % and less than or equal to 70 mol % of SiO ₂ ; greater than or equal to 11 mol % and less than or equal to 17 mol% Al ₂ O ₃ ; greater than or equal to 2 mol % and less than or equal to 8 mol % B ₂ O ₃ ; greater than or equal to 9 mol % and less than or equal to 14 mol % Li ₂ O; greater than or equal to 2 mol% and less than or equal to 6 mol% _Na2O ; greater than or equal to 0.1 mol% and less than or equal to 2 mol% MgO; greater than or equal to 0.1 mol% and less than or equal to 2 mol % of ZnO; and greater than or equal to 1×10 ⁻⁶ mol % and less than or equal to 0.01 mol % of Au. In these embodiments, MgO+ZnO is greater than or equal to 0.1 mol% and less than or equal to 4.5 mol%.

Different color coordinates within the color gamut can be achieved by varying the thermal processing cycle of the glass composition used to produce the resulting colored glass article. Thermal processing cycles are characterized by the temperature of the environment (ie, the oven) and the duration of the cycle (ie, the time of exposure to the heated environment). As used herein, the phrase "temperature of the thermal processing cycle" refers to the temperature of the environment (ie, the oven). In embodiments, glass articles formed from the glass compositions described herein are thermally processed in an isothermal oven to produce the resulting colored glass articles.

In embodiments, the temperature of the thermal processing cycle is greater than or equal to 550°C, greater than or equal to 575°C, greater than or equal to 600°C, greater than or equal to 625°C, or even greater than or equal to 650°C. In embodiments, the temperature of the thermal processing cycle is 800°C or less, 775°C or less, 750°C or less, 725°C or less, or even 700°C or less. In an embodiment, the temperature of the thermal processing cycle is greater than or equal to 550°C and less than or equal to 800°C, greater than or equal to 550°C and less than or equal to 775°C, greater than or equal to 550°C and less than or equal to 750°C, Greater than or equal to 550°C and less than or equal to 725°C, greater than or equal to 550°C and less than or equal to 700°C, greater than or equal to 575°C and less than or equal to 800°C, greater than or equal to 575°C and less than or equal to 775 °C, greater than or equal to 575 °C and less than or equal to 750 °C, greater than or equal to 575 °C and less than or equal to 725 °C, greater than or equal to 575 °C and less than or equal to 700 °C, greater than or equal to 600 °C and less than or Equal to 800°C, greater than or equal to 600°C and less than or equal to 775°C, greater than or equal to 600°C and less than or equal to 750°C, greater than or equal to 600°C and less than or equal to 725°C, greater than or equal to 600°C and less At or above 700°C, greater than or equal to 625°C and less than or equal to 800°C, greater than or equal to 625°C and less than or equal to 775°C, greater than or equal to 625°C and less than or equal to 750°C, greater than or equal to 625°C And less than or equal to 725°C, greater than or equal to 625°C and less than or equal to 700°C, greater than or equal to 650°C and less than or equal to 800°C, greater than or equal to 650°C and less than or equal to 775°C, greater than or equal to 650°C and less than or equal to 750°C, greater than or equal to 650°C and less than or equal to 725°C, or even greater than or equal to 650°C and less than or equal to 700°C, or any of these endpoints Any and all subranges.

In embodiments, the duration of the thermal processing cycle is greater than or equal to 0.25 hours, greater than or equal to 0.5 hours, greater than or equal to 1 hour, or even greater than or equal to 2 hours. In embodiments, the duration of the thermal processing cycle is less than or equal to 24 hours, less than or equal to 16 hours, less than or equal to 8 hours, or even less than or equal to 4 hours. In embodiments, the duration of the thermal processing cycle is greater than or equal to 0.25 hours and less than or equal to 24 hours, greater than or equal to 0.25 hours and less than or equal to 16 hours, greater than or equal to 0.25 hours and less than or equal to 8 hours , greater than or equal to 0.25 hours and less than or equal to 4 hours, greater than or equal to 0.5 hours and less than or equal to 24 hours, greater than or equal to 0.5 hours and less than or equal to 16 hours, greater than or equal to 0.5 hours and less than or equal to 8 hours, greater than or equal to 0.5 hours and less than or equal to 4 hours, greater than or equal to 1 hour and less than or equal to 24 hours, greater than or equal to 1 hour and less than or equal to 16 hours, greater than or equal to 1 hour and less than or equal to 8 hours, greater than or equal to 1 hour and less than or equal to 4 hours, greater than or equal to 2 hours and less than or equal to 24 hours, greater than or equal to 2 hours and less than or equal to 16 hours, greater than or equal to 2 hours and Less than or equal to 8 hours, or even greater than or equal to 2 hours and less than or equal to 4 hours, or any and all subranges formed by any of these endpoints.

In an embodiment, thermal processing may comprise the steps of increasing temperature at a heating rate to a thermal processing temperature, and cooling from the thermal processing temperature at a cooling rate. In embodiments, the heating and cooling rates selected can affect the color coordinates of the resulting colored glass article.

In an embodiment, the heating rate of the thermal processing may be greater than or equal to 2°C/min, or even greater than or equal to 3°C/min. In embodiments, the heating rate of thermal processing may be less than or equal to 10°C/min, less than or equal to 7°C/min, or even less than or equal to 5°C/min. In an embodiment, the heating rate of thermal processing may be greater than or equal to 2°C/min and less than or equal to 10°C/min, greater than or equal to 2°C/min and less than or equal to 7°C/min, greater than or equal to 2°C /min and less than or equal to 5°C/min, greater than or equal to 3°C/min and less than or equal to 10°C/min, greater than or equal to 3°C/min and less than or equal to 7°C/min, or even greater than or Equal to 3°C/min and less than or equal to 5°C/min, or any and all subranges formed by either of these endpoints.

In an embodiment, the cooling rate of the thermal processing may be greater than or equal to 1°C/min, or even greater than or equal to 2°C/min. In embodiments, the cooling rate of thermal processing may be less than or equal to 10°C/min, less than or equal to 8°C/min, less than or equal to 6°C/min, or even less than or equal to 4°C/min. In an embodiment, the cooling rate of thermal processing may be greater than or equal to 1°C/min and less than or equal to 10°C/min, greater than or equal to 1°C/min and less than or equal to 8°C/min, greater than or equal to 1°C /min and less than or equal to 6°C/min, greater than or equal to 1°C/min and less than or equal to 4°C/min, greater than or equal to 2°C/min and less than or equal to 10°C/min, greater than or equal to 2 °C/min and less than or equal to 8 °C/min, greater than or equal to 2 °C/min and less than or equal to 6 °C/min, or even greater than or equal to 2 °C/min and less than or equal to 4 °C/min, or Any and all subranges formed by any of these endpoints.

In an embodiment, the glass composition is thermally processed in an isothermal oven to produce the resulting colored glass article.

The colored glass articles described herein can be used in a variety of applications including, for example, back cover applications in consumer or commercial electronic devices (eg, smartphones, tablets, personal computers, laptops, televisions, and cameras). Figures 1 and 2 illustrate exemplary articles incorporating any of the colored glass articles disclosed herein. Specifically, FIGS. 1 and 2 illustrate a consumer electronic device 100 comprising: a housing 102 having a front surface 104, a rear surface 106, and side surfaces 108; electronic components (not shown), at least partially located inside or entirely inside the housing and including at least a controller, a memory, and a display 110 at or adjacent to the front surface of the housing; and a cover substrate 112 at the front surface of the housing or above the front surface and above the display. In an embodiment, at least a portion (eg, rear side 106 ) of housing 102 may include any of the colored glass articles disclosed herein. example

For an easier understanding of the various embodiments, reference is made to the following examples, which illustrate various embodiments of the colored glass articles described herein.

Thermal Processing - The thermal processing of the following examples consisted of placing the glass article between SiC holders, heating at a rate of 4°C/min to the specified thermal processing temperature, and, after the thermal processing time had elapsed, heating from the thermal processing temperature at 3°C /min cooling rate cooling.

Table 1 shows Comparative Examples C1 and C2 and Examples 1-30, reporting the batch composition (in mole %) used to form each Example. Table 1 also reports the thermal processing of the colored glass articles produced for the batch compositions and the analyzed Au concentrations (in mole %) of the resulting colored glass articles.

Table 1 example 1 2 3 C1 C2 4 SiO ₂ 58.8 58.8 58.8 58.5 58.5 58.5 Al ₂ O ₃ 16.5 16.5 16.5 16.5 16.5 16.5 B ₂ O ₃ 6.0 6.0 6.0 6.0 6.0 6.0 Li ₂ O 10.0 10.0 10.0 12.0 12.0 10.0 Na ₂ O 4.5 4.5 4.5 6.5 6.5 4.5 K ₂ O 0.2 0.2 0.2 0.5 0.5 0.5 MgO 3.0 3.0 3.0 - - 3.0 ZnO 1.0 1.0 1.0 - - 1.0 _ZrO2 - - - - - - P ₂ O ₅ - - - - - - _SnO2 - - - - - - _{Fe2O3 _} - - - - - - Au 0.005 0.005 0.005 0.010 0.020 0.010 R ₂ O 14.7 14.7 14.7 19.0 19.0 15.0 MgO+ZnO 4.0 4.0 4.0 0.0 0.0 4.0 _{R2O - Al2O3} -1.8 -1.8 -1.8 2.5 2.5 -1.5 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -546.7 -546.7 -546.7 -585.9 -585.9 -552.2 Thermal processing Melting temperature (°C) 1550 1500 1450 1450 1450 1450 Melting time (hours) 18 18 18 18 18 18 Analyzed Au (mol%) 0.0009 0.0017 0.0018 0.0013 0.0023 0.0030 % of Au retained 18.0 34.0 36.0 13.0 11.5 30.0

Continuation of Table 1 example 5 6 7 8 9 10 SiO ₂ 58.5 60.7 60.7 60.7 60.7 60.7 Al ₂ O ₃ 16.5 14.5 14.5 14.5 14.5 14.5 B ₂ O ₃ 6.0 6.0 6.0 6.0 6.0 6.0 Li ₂ O 10.0 10.0 10.0 10.0 10.0 10.0 Na ₂ O 4.5 4.5 4.5 4.5 4.5 4.5 K ₂ O 0.5 0.5 0.5 0.5 0.5 0.2 MgO 3.0 3.0 3.0 3.0 3.0 3.0 ZnO 1.0 1.0 1.0 1.0 1.0 1.0 _ZrO2 - - 0.5 - 0.5 0.5 P ₂ O ₅ - - - 1.0 1.0 - _SnO2 - 0.10 0.10 0.10 0.10 0.05 _{Fe2O3 _} - - - - - - Au 0.020 0.005 0.005 0.005 0.005 0.005 R ₂ O 15.0 15.0 15.0 15.0 15.0 14.7 MgO+ZnO 4.0 4.0 4.0 4.0 4.0 4.0 _{R2O - Al2O3} -1.5 0.5 0.5 0.5 0.5 0.2 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -552.2 -563.7 -563.7 -566.2 -566.2 -558.1 Thermal processing Melting temperature (°C) 1450 1550 1550 1550 1550 1550 Melting time (hours) 18 18 18 18 18 18 Analyzed Au (mol%) 0.0043 0.0013 0.0018 0.0006 0.0007 0.0019 % of Au retained 21.5 26.0 36.0 12.0 14.0 38.0

Continuation of Table 1 example 11 12 13 14 15 16 SiO ₂ 60.7 60.7 60.7 61.8 61.8 61.8 Al ₂ O ₃ 14.5 14.5 14.5 14.5 14.5 14.5 B ₂ O ₃ 6.0 6.0 6.0 6.0 6.0 6.0 Li ₂ O 10.0 10.0 10.0 6.5 6.5 6.5 Na ₂ O 4.5 4.5 4.5 8.0 8.0 8.0 K ₂ O 0.2 0.2 0.2 0.2 0.2 0.2 MgO 3.0 3.0 3.0 2.0 2.0 2.0 ZnO 1.0 1.0 1.0 1.0 1.0 1.0 _ZrO2 0.2 0.3 0.5 - - 0.2 P ₂ O ₅ - - - - - - _SnO2 0.01 0.03 0.05 - 0.05 0.05 _{Fe2O3 _} - - - - - - Au 0.005 0.005 0.005 0.005 0.005 0.005 R ₂ O 14.7 14.7 14.7 14.7 14.7 14.7 MgO+ZnO 4.0 4.0 4.0 3.0 3.0 3.0 _{R2O - Al2O3} 0.2 0.2 0.2 0.2 0.2 0.2 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -558.1 -558.1 -558.1 -496.7 -496.7 -496.7 Thermal processing Melting temperature (°C) 1550 1550 1550 1500 1500 1500 Melting time (hours) 18 18 18 18 18 18 Analyzed Au (mol%) 0.0013 0.0016 0.0017 0.0009 0.0010 0.0012 % of Au retained 26.0 32.0 34.0 18.0% 20.0% 24.0%

Continuation of Table 1 example 17 18 19 20 twenty one twenty two SiO ₂ 61.8 61.8 61.8 60.8 60.8 60.8 Al ₂ O ₃ 14.5 14.5 14.5 15.5 15.5 15.5 B ₂ O ₃ 6.0 6.0 6.0 6.0 6.0 6.0 Li ₂ O 6.5 6.5 6.5 6.5 6.5 6.5 Na ₂ O 8.0 8.0 8.0 8.0 8.0 8.0 K ₂ O 0.2 0.2 0.2 0.2 0.2 0.2 MgO 2.0 2.0 2.0 2.0 2.0 2.0 ZnO 1.0 1.0 1.0 1.0 1.0 1.0 _ZrO2 - - 0.2 - - 0.2 P ₂ O ₅ - - - - - - _SnO2 - 0.05 0.05 - 0.05 0.05 _{Fe2O3 _} - - - - - - Au 0.005 0.005 0.005 0.005 0.005 0.005 R ₂ O 14.7 14.7 14.7 14.7 14.7 14.7 MgO+ZnO 3.0 3.0 3.0 3.0 3.0 3.0 _{R2O - Al2O3} 0.2 0.2 0.2 -0.8 -0.8 -0.8 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -496.7 -496.7 -496.7 -490.9 -490.9 -490.9 Thermal processing Melting temperature (°C) 1500 1500 1500 1500 1500 1500 Melting time (hours) 18 18 18 18 18 18 Analyzed Au (mol%) 0.0010 0.0011 0.0014 0.0012 0.0012 0.0012 % of Au retained 20.0% 22.0% 28.0% 24.0% 24.0% 24.0%

Continuation of Table 1 example twenty three twenty four 25 26 27 28 SiO ₂ 61.2 61.2 60.7 60.7 60.7 60.7 Al ₂ O ₃ 14.5 14.5 14.5 14.5 14.5 14.5 B ₂ O ₃ 6.0 6.0 6.0 6.0 6.0 6.0 Li ₂ O 6.5 6.5 8.0 9.0 9.0 9.0 Na ₂ O 8.0 8.0 4.5 4.5 4.5 4.5 K ₂ O 0.8 0.8 0.2 0.2 0.2 0.2 MgO 2.0 2.0 4.0 4.0 3.0 4.0 ZnO 1.0 1.0 2.0 1.0 2.0 1.0 _ZrO2 - - - - - - P ₂ O ₅ - - - - - - _SnO2 0.10 0.10 0.05 0.05 0.05 0.05 _{Fe2O3 _} 0.05 0.05 0.10 0.05 0.05 0.10 Au 0.005 0.005 0.005 0.005 0.005 0.005 R ₂ O 15.3 15.3 12.7 13.7 13.7 13.7 MgO+ZnO 3.0 3.0 6.0 5.0 5.0 5.0 _{R2O - Al2O3} 0.8 0.8 -1.8 -0.8 -0.8 -0.8 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -506.8 -506.8 -530.0 -543.6 -544.5 -543.6 Thermal processing Melting temperature (°C) 1500 1500 1500 1500 1500 1500 Melting time (hours) 16 16 18 18 18 18 Analyzed Au (mol%) 0.0016 0.0017 0.0005 0.0009 0.0005 0.0006 % of Au retained 32.0% 34.0% 10.0% 18.0% 10.0% 12.0%

Continuation of Table 1 example 29 30 SiO ₂ 61.2 61.2 Al ₂ O ₃ 14.5 14.5 B ₂ O ₃ 6.0 6.0 Li ₂ O 6.5 6.5 Na ₂ O 8.0 8.0 K ₂ O 0.8 0.8 MgO 2.0 2.0 ZnO 1.0 1.0 _ZrO2 - - P ₂ O ₅ - - _SnO2 0.10 0.10 _{Fe2O3 _} 0.05 0.05 Au 0.005 0.005 R ₂ O 15.3 15.3 MgO+ZnO 3.0 3.0 _{R2O - Al2O3} -0.8 -0.8 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -544.5 -544.5 Thermal processing Melting temperature (°C) 1500 1500 Melting time (hours) 18 18 Analyzed Au (mol%) 0.0006 0.0013 % of Au retained 12.0% 26.0%

Referring to Table 1, Examples 1-3 were formed from the same glass composition but melted at different temperatures. The Au retention system of Example 1 melted at 1550°C was 18.0%. The Au retention systems of Examples 2 and 3 melted at 1500°C and 1450°C were 34.0% and 36.0%, respectively. As shown in Examples 1-3, lower melting temperatures favor Au retention. Therefore, it may be desirable to form a glass composition with a lower melting point, which may improve Au retention during processing.

The Au retentions of Comparative Examples C1 and C2 after melting at 1450° C. for 18 hours are 13.0% and 11.5%, respectively. Examples 4 and 5 are similar to Comparative Examples C1 and C2, respectively, but include MgO and ZnO, and the Au retention after melting at 1450° C. for 18 hours is 30.0% and 21.5%, respectively. As shown in Comparative Examples C1 and C2 and Examples 4 and 5, the inclusion of MgO and ZnO in the glass composition improves the Au retention of the resulting colored glass product.

Example 6 had an Au retention of 26.0% after melting at 1550°C for 18 hours. Example 7 is similar to Example 3, but includes _ZrO2 , and has an Au retention of 36.0% after melting at 1550°C for 18 hours. As shown in Examples 6 and 7, including _ZrO2 in the glass composition, in addition to MgO and ZnO, improves the Au retention of the resulting colored glass article.

Examples 8 and 9 are similar to Examples 6 and 7, respectively, but include _P2O5 , and have lower Au retention of 12.0% and 14.0% _, respectively, after melting at 1550°C for 18 hours. As shown in Examples 6-9, the inclusion of _P2O5 in _the glass composition compromised the Au retention of the resulting colored glass articles.

The relatively high Au retention of Examples 10-13 including _ZrO2 and _SnO2 after melting at 1550°C for 18 hours was 38.0%, 26.0%, 32.0%, and 34%, respectively. As shown in Examples 10-13, including SnO ₂ in the glass composition, in addition to MgO, ZnO, and ZrO ₂ , improved the Au retention of the resulting colored glass articles.

The Au retentions of Examples 14 and 17 after melting at 1550° C. for 18 hours were 18.0% and 20.0%, respectively. Examples 15 and 18 were similar to Examples 14 and 17, but included _SnO2 , and the Au retention after melting at 1550°C for 18 hours was 20.0% and 22%, respectively. As shown in Examples 15 and 18, including _SnO2 in the glass composition, in addition to MgO and ZnO, improves the Au retention of the resulting colored glass articles.

The relatively high retention of Au after melting at 1550° C. for 18 hours for Examples 16 and 19 including ZrO ₂ and SnO ₂ is 24.0% and 28.0%, respectively. As shown in Examples 16 and 19, including _SnO2 in the glass composition, in addition to MgO, ZnO, and _ZrO2 , improves the Au retention of the resulting colored glass article.

The relatively high retention of Au after melting at 1550° C. for 18 hours for Examples 23 and 24 including Fe ₂ O ₃ is 32.0% and 34.0%, respectively. As shown in Examples 23 and 24, including _Fe2O3 in _the glass composition, in addition to MgO, ZnO, and _ZrO2 , improves the Au retention of the resulting colored glass article.

Referring now to Figures 3A-3C, 4A-4C, 5A-5C, and 6A-6C, a gradient temperature approach is used to identify thermal processing cycle parameters (i.e., temperature and duration) to achieve the desired color coordinates. Specifically, a 12 cm long and 1.5 mm thick sample formed from the glass composition of Example 11 was placed in a gradient temperature oven and held at a thermal processing temperature varying along the length of the sample for a specified time. Then, the sample was rapidly cooled to quench the sample and the Au particles precipitated therein. Then, the optical transmission spectrum was measured every 2 mm along the direction of the gradient. Coordinates plotted in CIELAB color space measured under F2 illumination and 10° standard observer angle, with thermal processing temperature shifted in color space in separate plots with four different thermal processing durations: 0.25 hours (section 3A Figures to 3C), 0.5 hours (Figures 4A to 4C), 1 hour (Figures 5A to 5C), and 1.5 hours (Figures 6A to 6C). As shown in Figures 3A-3C, 4A-4C, 5A-5C, and 6A-6C, different thermal processing temperatures and durations can be used to achieve the desired desired color.

It should be noted that, as described herein, the processing of the glass compositions used to produce the resulting colored glass articles may be performed in an isothermal oven. However, in these examples a gradient temperature oven was used to study the temperature range simultaneously. Gradient temperature ovens produced similar results to isothermal ovens at the desired temperature.

Table 2 shows the analyzed concentrations (in mole %) for Examples 31-65 and the resulting colored glass articles.

Table 2 example 31 32 33 34 35 36 SiO ₂ 61.09 61.03 61.08 60.99 60.87 60.73 Al ₂ O ₃ 14.51 14.50 14.51 14.49 14.44 14.58 B ₂ O ₃ 6.00 6.00 5.86 5.93 5.91 5.94 Li ₂ O 9.94 9.94 10.07 10.10 10.01 10.10 Na ₂ O 4.30 4.33 4.28 4.28 4.25 4.31 K ₂ O 0.19 0.19 0.19 0.19 0.45 0.19 MgO 2.89 2.90 2.89 2.89 2.89 2.93 ZnO 1.00 1.00 0.99 0.99 0.99 1.05 _ZrO2 0.22 0.30 0.45 0.50 0.03 0.00 P ₂ O ₅ - - - - - - _SnO2 0.02 0.03 0.05 0.07 0.11 0.11 _{Fe2O3 _} 0.02 0.02 0.02 0.02 0.02 0.00 Au 0.0013 0.0015 0.0017 0.0019 0.0013 0.0009 R ₂ O 14.43 14.46 14.54 14.57 14.71 14.60 MgO+ZnO 3.89 3.90 3.88 3.88 3.88 3.98 _{R2O - Al2O3} -0.08 -0.04 0.03 0.08 0.27 0.02 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -548.9 -549.8 -550.4 -552.7 -553.6 -555.2

Continuation form 2 example 37 38 39 40 41 42 SiO ₂ 61.26 60.71 59.87 60.15 59.28 61.36 Al ₂ O ₃ 14.38 14.65 14.86 15.43 15.07 15.72 B ₂ O ₃ 5.89 5.95 5.95 5.88 5.70 6.00 Li ₂ O 10.00 10.05 10.14 10.01 9.80 10.21 Na ₂ O 4.28 4.30 4.31 4.27 6.03 4.34 K ₂ O 0.19 0.19 0.19 0.19 0.18 0.20 MgO 2.86 2.93 3.11 2.89 2.80 0.97 ZnO 1.01 1.06 1.09 1.02 0.99 1.05 _ZrO2 0.00 0.00 0.32 0.00 0.00 0.00 P ₂ O ₅ - - - - - - _SnO2 0.06 0.05 0.05 0.11 0.10 0.11 _{Fe2O3 _} 0.00 0.07 0.07 0.00 0.00 0.00 Au 0.0007 0.0005 0.0007 0.0008 0.0005 0.0010 R ₂ O 14.47 14.54 14.64 14.47 16.01 14.75 MgO+ZnO 3.87 3.99 4.20 3.91 3.79 2.02 _{R2O - Al2O3} 0.09 -0.11 -0.22 -0.96 0.94 -0.97 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -549.0 -553.2 -559.7 -543.8 -573.8 -514.2

Continuation form 2 example 43 44 45 46 47 48 SiO ₂ 60.94 59.36 60.40 60.59 60.56 60.64 Al ₂ O ₃ 16.51 16.42 15.52 15.32 15.23 15.08 B ₂ O ₃ 5.89 5.78 6.05 6.04 6.04 6.01 Li ₂ O 10.05 9.90 10.66 10.65 10.63 10.74 Na ₂ O 4.27 4.22 4.77 4.79 4.89 4.90 K ₂ O 0.19 0.19 0.19 0.19 0.20 0.20 MgO 0.97 2.94 0.97 0.97 0.98 0.97 ZnO 1.03 1.03 1.02 1.02 1.05 1.05 _ZrO2 0.00 0.00 0.31 0.32 0.31 0.32 P ₂ O ₅ - - - - - - _SnO2 0.10 0.11 0.05 0.06 0.06 0.05 _{Fe2O3 _} - - - - - - Au 0.0010 0.0006 0.0008 0.0008 0.0008 0.0007 R ₂ O 14.51 14.31 15.62 15.63 15.72 15.84 MgO+ZnO 2.00 3.97 1.99 1.99 2.03 2.02 _{R2O - Al2O3} -2.00 -2.11 0.10 0.31 0.49 0.76 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -500.0 -532.7 -541.1 -542.2 -545.4 -549.6

Continuation form 2 example 49 50 51 52 53 54 SiO ₂ 60.94 59.36 60.40 60.59 62.14 62.08 Al ₂ O ₃ 16.51 16.42 15.52 15.32 14.95 14.98 B ₂ O ₃ 5.89 5.78 6.05 6.04 6.06 5.93 Li ₂ O 10.05 9.90 10.66 10.65 10.51 10.69 Na ₂ O 4.27 4.22 4.77 4.79 4.29 4.31 K ₂ O 0.19 0.19 0.19 0.19 0.14 0.14 MgO 0.97 2.94 0.97 0.97 0.50 0.50 ZnO 1.03 1.03 1.02 1.02 1.03 1.00 _ZrO2 0.00 0.00 0.31 0.32 0.29 0.29 P ₂ O ₅ - - - - - - _SnO2 0.10 0.11 0.05 0.06 0.04 0.04 _{Fe2O3 _} - - - - 0.04 0.04 Au 0.0008 0.0010 0.0012 0.0015 0.0014 0.0011 R ₂ O 14.51 14.31 15.62 15.63 14.94 15.14 MgO+ZnO 2.00 3.97 1.99 1.99 1.54 1.51 _{R2O - Al2O3} -2.00 -2.11 0.10 0.31 -0.01 0.16 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -556.1 -558.4 -557.7 -558.9 -517.8 -521.6

Continuation form 2 example 55 56 57 58 59 60 SiO ₂ 62.06 61.95 61.95 61.67 61.01 60.66 Al ₂ O ₃ 14.92 14.87 14.88 14.88 14.96 15.03 B ₂ O ₃ 5.92 5.91 5.92 5.93 6.04 6.06 Li ₂ O 10.86 11.03 11.04 11.06 11.18 11.21 Na ₂ O 4.25 4.24 4.24 4.25 4.26 4.28 K ₂ O 0.14 0.14 0.14 0.14 0.14 0.14 MgO 0.50 0.50 0.49 0.50 0.50 0.50 ZnO 1.01 1.02 1.01 1.02 1.03 1.03 _ZrO2 0.28 0.28 0.28 0.28 0.28 0.28 P ₂ O ₅ - - - 0.21 0.56 0.76 _SnO2 0.04 0.04 0.04 0.04 0.04 0.04 _{Fe2O3 _} 0.02 0.01 - - - - Au 0.0010 0.0010 0.0011 0.0010 0.0010 0.0010 R ₂ O 15.25 15.41 15.42 15.46 15.58 15.63 MgO+ZnO 1.51 1.52 1.50 1.52 1.53 1.54 _{R2O - Al2O3} 0.33 0.54 0.55 0.58 0.62 0.60 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -526.5 -532.6 -532.8 -534.9 -541.5 -543.7

Continuation form 2 example 61 62 63 64 65 SiO ₂ 60.51 60.49 60.80 60.94 61.47 Al ₂ O ₃ 15.06 15.02 14.76 14.61 14.60 B ₂ O ₃ 6.06 6.07 6.05 5.97 5.91 Li ₂ O 11.21 11.22 11.20 11.17 11.12 Na ₂ O 4.30 4.30 4.29 4.29 4.27 K ₂ O 0.14 0.14 0.14 0.15 0.15 MgO 0.51 0.51 0.51 0.51 0.50 ZnO 1.03 1.04 1.03 1.03 1.04 _ZrO2 0.28 0.28 0.28 0.48 0.50 P ₂ O ₅ 0.86 0.89 0.90 0.81 0.40 _SnO2 0.04 0.04 0.04 0.04 0.04 _{Fe2O3 _} - - - - - Au 0.0009 0.0010 0.0009 0.0011 0.0010 R ₂ O 15.65 15.67 15.63 15.61 15.53 MgO+ZnO 1.54 1.54 1.53 1.54 1.54 _{R2O - Al2O3} 0.59 0.65 0.87 1.00 0.93 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -544.2 -545.2 -545.1 -543.6 -539.3

Referring now to Table 3, exemplary glass articles 31-35 having the concentrations shown in Table 2 were subjected to isothermal thermal processing between 600°C and 660°C. Table 3 shows the observable color of the resulting colored glass articles. Thermal processing of glass articles E31, E32, and _E33 with -0.08 mol%, -0.04 mol%, and 0.03 mol% of analyzed _R2O - _Al2O3 , respectively, resulted in observable Pink, purple, and red colored glass products. Thermal processing of glass articles E34 and _E35 with 0.08 mol% and 0.27 mol% of analyzed _R2O - _Al2O3 , respectively, resulted in observable red and orange tinted glass articles. As shown in Table 2 and Table 3, the analyzed R ₂ O—Al ₂ O ₃ of the glass article can be adjusted, and the glass article can withstand certain thermal processing to provide the desired colored glass article.

table 3 example 31 32 33 34 35 observable color pink, purple pink, purple pink, purple pink, red, purple orange, red

Referring now to Table 4, exemplary glass articles 36-48 having the assay concentrations shown in Table 2 were subjected to thermal processing at the temperatures and time periods shown in Table 4. Table 4 shows the observable color of the resulting colored glass articles.

Table 4 Thermal processing 550 °C for 2 hours 575 °C for 2 hours 600 °C for 2 hours 625 °C for 2 hours 650 °C for 2 hours 36 Purple Purple Purple Purple - 37 clear, purple Purple Purple red - 38 Pink Pink Pink Pink - 39 red red red red - 40 clear, purple Purple Purple Purple - 41 orange orange orange orange - 42 clear, purple Purple Purple Purple - 43 clear clear Purple Purple - 44 clear clear Purple Purple - 45 Purple Purple Purple red red 46 clear, purple Purple Purple red red 47 Purple Purple red red red 48 Purple Purple red red red

Exemplary glass article E41 with 0.94 mol% _R2O - _Al2O3 analyzed was the only glass article that gave an observable orange colored glass article after thermal _processing . Exemplary glass articles E36-E40 and E42-E48 have 0.76 mol % or less of R ₂ O—Al ₂ O ₃ . Thermal processing _of glass article E38 comprising _Fe2O3 resulted in a visibly pink colored glass article. Glass articles E39 and E45-48 including _ZrO2 were thermally processed to obtain red colored glass articles. As shown in Table 2 and Table 4, the analyzed R ₂ O-Al ₂ O ₃ can be adjusted, other components can be added to the glass composition, and the glass product can withstand certain thermal processing to provide the desired colored Glass product.

Table 5 shows the analyzed concentrations (in mole %) for Examples 66-75 and the resulting colored glass articles.

table 5 example 66 67 68 69 70 71 SiO ₂ 62.15 62.27 62.22 62.19 62.08 61.95 Al ₂ O ₃ 14.93 14.97 14.90 14.95 14.98 14.87 B ₂ O ₃ 6.09 5.98 6.03 6.03 5.93 5.91 Li ₂ O 10.50 10.45 10.53 10.50 10.69 11.03 Na ₂ O 4.30 4.30 4.28 4.27 4.31 4.24 K ₂ O 0.14 0.14 0.14 0.14 0.14 0.14 MgO 0.50 0.50 0.50 0.50 0.50 0.50 ZnO 1.03 1.00 1.03 1.04 1.00 1.02 _ZrO2 0.28 0.29 0.28 0.29 0.29 0.28 P ₂ O ₅ 0.00 0.00 0.00 0.00 0.00 0.00 _SnO2 0.04 0.04 0.04 0.04 0.04 0.04 _{Fe2O3 _} 0.04 0.04 0.04 0.04 0.04 0.01 Au 6.0 x 10 ^-6 9.0 x 10 ^-6 1.2 x ^10-5 1.1 x ^10-5 8.0 x 10 ^-6 1.0 x 10 ^-5 R ₂ O 14.94 14.89 14.95 14.91 15.14 15.41 MgO+ZnO 1.53 1.50 1.53 1.54 1.50 1.52 _{R2O - Al2O3} 0.01 -0.08 0.05 -0.04 0.16 0.54 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -518.27 -513.82 -518.03 -516.67 -521.57 -532.56

Continuation from Table 5 example 72 73 74 75 SiO ₂ 61.67 61.47 62.75 61.67 Al ₂ O ₃ 14.88 14.60 14.47 14.88 B ₂ O ₃ 5.93 5.91 5.88 5.93 Li ₂ O 11.06 11.12 11.07 11.06 Na ₂ O 4.25 4.27 4.27 4.25 K ₂ O 0.14 0.15 0.15 0.14 MgO 0.50 0.50 0.29 0.50 ZnO 1.02 1.04 0.47 1.02 _ZrO2 0.28 0.50 0.52 0.28 P ₂ O ₅ 0.21 0.40 0.08 0.21 _SnO2 0.04 0.04 0.04 0.04 _{Fe2O3 _} 0.00 0.00 0.00 0.00 Au 8.3 x 10 ^-6 8.3 x 10 ^-6 8.3 x 10 ^-6 8.3 x 10 ^-6 R ₂ O 15.45 15.54 15.49 15.45 MgO+ZnO 1.52 1.54 0.76 1.52 _{R2O - Al2O3} 0.57 0.94 1.02 0.57 5.72*Al ₂ O ₃ - 21.4*ZnO - 2.5*P ₂ O ₅ - 35*Li ₂ O - 16.6*B ₂ O ₃ - 20.5*MgO - 23.3*Na ₂ O - 27.9*SrO - 18.5*K ₂ O - 26.3*CaO -534.64 -539.57 -520.76 -534.64

Referring now to Table 6, exemplary glass articles 66 and 68-75 having the assay concentrations shown in Table 5 were subjected to thermal processing at the temperatures and time periods shown in Table 6. Table 6 shows the observable color of the resulting colored glass articles.

Table 6 Thermal processing 550 °C for 2 hours 575 °C for 2 hours 600 °C for 2 hours 625 °C for 2 hours 650 °C for 2 hours 550 °C for 8 hours 575 °C for 8 hours 66 - blue blue blue - - - 68 - blue blue red - - - 69 - Purple Purple red - - - 70 red Purple blue blue - - - 71 clear, purple blue blue Purple - - - 72 clear, purple Purple Purple Purple - - - 73 clear, purple Purple Purple Purple - - - 74 clear, purple Purple Purple red red red red 75 - - Purple red red Purple red

Exemplary glass articles 71-75 having an analyzed R ₂ O—Al ₂ O ₃ greater than or equal to 0.54 mol % had relatively limited achievable color gamuts after being subjected to various thermal processes. As shown in Table 6 _, the relatively increased _R2O - _Al2O3 may limit the achievable color gamut of colored glass articles.

Referring now to Table 7, exemplary glass articles 66 having the assay concentrations shown in Table 5 and the thicknesses shown in Table 7 were subjected to thermal processing at the temperatures and time periods shown in Table 7. Table 7 shows the transmitted color coordinates in the CIELAB color space measured at the specified article thicknesses under F2 illumination and a 10° standard observer angle, and the resulting observable colors of the colored glass articles.

Table 7 thickness 525 °C for 6 hours 535 °C for 6 hours 535 °C for 10 hours 545 °C for 10 hours 575 °C for 2 hours L* 96.39 95.09 92.01 91.06 92.75 a* 0.15 1.68 4.21 2.53 -0.60 b* 0.27 -0.12 -2.12 -3.64 -2.62 observable color clear Pink Pink Purple blue 1.33mm L* 96.14 94.18 86.80 84.96 87.95 a* 0.31 2.60 8.81 3.50 -1.67 b* 0.42 -0.09 -4.55 -7.99 -5.86 observable color clear Pink Pink Purple blue 2.06mm L* 95.69 90.65 83.19 78.95 83.25 a* 0.55 6.37 13.52 6.58 -3.01 b* 0.63 -0.97 -4.53 -11.46 -8.40 observable color clear Pink Pink Purple blue

Continuation of Table 7 thickness 600 °C for 2 hours 625 °C for 2 hours 0.6mm L* 93.60 92.21 a* -0.61 -0.12 b* -0.60 -1.91 observable color blue blue 1.33mm L* 90.23 87.41 a* -1.34 -0.15 b* -1.72 -4.02 observable color blue blue 2.06mm L* 86.49 82.29 a* -2.05 -0.24 b* -2.30 -5.93 observable color blue blue

Referring now to Table 8, exemplary glass articles 68 having the assay concentrations shown in Table 5 and the thicknesses shown in Table 8 were subjected to thermal processing at the temperatures and time periods shown in Table 8. Table 8 shows the transmitted color coordinates in CIELAB color space measured at specified article thicknesses under F2 illumination and a 10° standard observer angle, and the resulting observable colors of the colored glass articles.

Table 8 thickness 545 °C for 2 hours 550 °C for 2 hours 555 °C for 1.5 hours 535 °C for 10 hours 545 °C for 4 hours 0.6mm L* 93.11 92.14 91.56 91.16 90.79 a* 3.74 4.82 4.74 6.02 5.90 b* -0.62 -1.31 -2.06 -0.27 -1.33 observable color Pink Pink Pink red Pink 1.33mm L* 89.09 87.26 86.79 85.12 84.78 a* 7.98 9.84 9.46 12.00 11.74 b* -1.42 -2.58 -3.64 -0.72 -2.32 observable color Pink Purple Pink red Pink 2.06mm L* 84.41 81.51 81.40 79.52 78.50 a* 12.63 15.29 14.09 17.14 17.21 b* -2.25 -4.01 -5.39 -0.26 -3.16 observable color Pink Purple Pink red red

Continuation of Table 8 thickness 560 °C for 0.75 hours 555 °C for 4 hours 570 °C for 0.75 hours 625 °C for 3 hours 600 °C for 2 hours 0.6mm L* 92.14 89.13 88.96 88.74 89.18 a* 4.61 5.00 4.90 2.75 -1.05 b*-1.57 -1.57 -3.95 -4.51 -4.49 -4.32 observable color Pink Purple Purple Purple Purple 1.33mm L* 85.56 81.32 79.76 80.41 79.58 a* 10.56 10.79 7.38 5.66 -2.04 b* -4.34 -7.51 -10.45 -9.10 -9.85 observable color Pink Purple Purple Purple Purple 2.06mm L* 77.01 74.55 70.91 71.91 71.33 a* 16.22 16.05 8.60 8.16 -2.76 b* -8.50 -9.19 -15.68 -13.36 -14.14 observable color Pink Pink Purple Purple Purple

Continuation of Table 8 thickness 575 °C for 2 hours 575 °C for 4 hours 0.6mm L* 88.09 88.92 a* -01.8 1.77 b* -5.64 -4.80 observable color blue blue 1.33mm L* 78.27 80.57 a* 0.17 3.42 b* -11.89 -9.88 observable color blue blue 2.06mm L* 70.17 72.06 a* -0.58 4.74 b* -16.48 -14.79 observable color blue blue

Referring now to Table 9, exemplary glass articles 68 having the assay concentrations shown in Table 5 and the thicknesses shown in Table 9 were subjected to thermal processing at the temperatures and time periods shown in Table 9. Table 9 shows the transmitted color coordinates in the CIELAB color space measured at the specified article thicknesses under F2 illumination and a 10° standard observer angle, and the resulting observable colors of the colored glass articles.

Table 9 thickness 530 °C for 3 hours 535 °C for 6 hours 545 °C for 2 hours 550 °C for 2 hours 555 °C for 1.5 hours 0.6mm L* 94.72 90.50 89.99 88.79 88.58 a* 1.96 6.78 7.30 7.58 7.50 b* 0.34 0.18 -0.85 -1.80 -2.57 observable color Pink Pink Pink Pink Pink 1.33mm L* 92.64 84.15 83.50 80.52 79.57 a* 3.99 13.49 14.01 14.51 14.41 b* 0.62 0.67 -0.95 -3.71 -5.60 observable color Pink red red Pink Pink 2.06mm L* 90.49 77.92 74.81 72.37 71.79 a* 6.07 19.65 21.74 20.56 21.07 b* 0.97 1.59 -1.98 -5.27 -6.54 observable color Pink red Pink Pink Pink

Continuation of Table 9 thickness 555 °C for 4 hours 650 °C for 2 hours 540 °C for 3 hours 565 °C for 1.75 hours 585 °C for 2 hours 0.6mm L* 88.59 87.25 88.03 86.62 87.36 a* 6.20 7.01 4.98 3.98 2.37 b* -2.50 -4.14 -4.41 -5.65 -5.52 observable color Purple Purple Purple Purple Purple 1.33mm L* 80.63 77.89 78.78 76.92 77.59 a* 13.13 13.81 10.10 8.92 5.17 b* -3.71 -7.35 -8.78 -10.22 -10.98 observable color Purple Purple Purple Purple Purple 2.06mm L* 71.87 68.47 70.21 67.15 68.17 a* 18.44 19.71 14.96 12.94 7.47 b* -6.46 -10.62 -12.00 -14.54 -15.73 observable color Purple Purple Purple Purple Purple

Continuation of Table 9 thickness 560 °C for 0.75 hours 600 °C for 2 hours 0.6mm L* 87.04 87.56 a* 0.99 1.39 b* -6.09 -5.32 observable color blue blue 1.33mm L* 77.03 77.57 a* 3.32 2.56 b* -11.99 -10.84 observable color blue blue 2.06mm L* 67.17 68.30 a* 3.12 4.07 b* -17.38 -15.38 observable color blue blue

As shown in Tables 7-9, colored glass articles comprising Au can be subjected to various thermal processes to achieve the desired observable color.

Table 10 shows the surface compressive stress CS, depth of layer DOL, and maximum central tension CT of exemplary glass articles 67 subjected to thermal processing at 545° C. for 2 hours and then subjected to ion exchange under the conditions listed in Table 10.

Table 10 IOX temperature (°C) 400 400 400 400 400 400 400 IOX time (hours) 5 6 7 8 6 6.5 6.5 _KNO3 in IOX bath (wt%) 83.0 83.0 83.0 83.0 83.0 83.0 80.0 _NaNO3 in 10X bath (wt%) 15.4 15.4 15.4 15.4 15.6 15.0 18.0 _LiNO3 in IOX bath (wt%) 1.6 1.6 1.6 1.6 1.4 2.0 2.0 CS ( MPa ) 720 643 632 623 657 621 611 DOC (μ m ) 4.46 4.86 5.36 5.44 5.00 5.04 4.85 CT ( MPa ) 111.1 117.4 116.3 115.6 119.2 109.1 118.2

Those of ordinary skill in the art will understand that various modifications and changes to the embodiments described herein can be made without departing from the spirit and scope of the claimed subject matter. Thus, it is intended that the present disclosure cover modifications and variations of the various embodiments presented herein which come within the scope of the patent claims and their equivalents.

100: Consumer Electronics 102: Shell 104: front surface 106: rear surface 108: side surface 110: Display 112: cover substrate

Figure 1 is a plan view of an electronic device incorporating any of the colored glass articles according to one or more embodiments described herein;

Figure 2 is a perspective view of the electronic device of Figure 1;

Figure 3A is CIELAB space (x-axis: a*; y-axis: b*) vs. A plot of the function of thermal processing temperature;

Fig. 3B is a diagram of the CIELAB space (x-axis: a*; y-axis: L*) of the projection a* and L* of the colored glass product in Fig. 3A;

Figure 3C is a figure in CIELAB space (x-axis: b*; y-axis: L*) of the projection b* and L* of the colored glass product in Figure 3A;

Figure 4A is a CIELAB space (x-axis: a*; y-axis: b*) vs. A plot of the function of thermal processing temperature;

Figure 4B is the figure of CIELAB space (x-axis: a*; y-axis: L*) of the projection a* and L* of the colored glass product of Figure 4A;

Fig. 4C is a diagram of the CIELAB space (x-axis: b*; y-axis: L*) of the projection b* and L* of the colored glass product in Fig. 4A;

Figure 5A is a CIELAB space (x-axis: a*; y-axis: b*) vs. A plot of the function of thermal processing temperature;

Fig. 5B is a diagram of the CIELAB space (x-axis: a*; y-axis: L*) of the projection a* and L* of the colored glass product of Fig. 5A;

Fig. 5C is a diagram of the CIELAB space (x-axis: b*; y-axis: L*) of the projection b* and L* of the colored glass product of Fig. 5A;

Figure 6A is CIELAB space (x-axis: a*; y-axis: b*) vs. A plot of the function of thermal processing temperature;

Figure 6B is a diagram of the CIELAB space (x-axis: a*; y-axis: L*) of the projection a* and L* of the colored glass product of Figure 6A; and

Fig. 6C is a diagram of the CIELAB space (x-axis: b*; y-axis: L*) of the projection b* and L* of the colored glass product of Fig. 6A.

Domestic deposit information (please note in order of depositor, date, and number) none Overseas storage information (please note in order of storage country, institution, date, and number) none

100: Consumer Electronics

102: shell

104: front surface

106: rear surface

108: side surface

110: Display

112: cover substrate

Claims (10)

A glass composition comprising: greater than or equal to 40 mol % and less than or equal to 70 mol % of SiO ₂ ; greater than or equal to 8 mol % and less than or equal to 20 mol % of Al ₂ O ₃ ; greater than or equal to or equal to 1 mol% and less than or equal to 10 mol% of _B2O3 ; greater than or equal to 1 mol% and less than or equal to 20 mol% _{of Li2O} ; greater than or equal to 1 mol% and 15 mol% or less of _Na2O ; greater than or equal to 0 mol% and less than or equal to 6 mol% of MgO; greater than or equal to 0 mol% and less than or equal to 5 mol% of ZnO and Au greater than or equal to 1×10 ⁻⁶ mol% and less than or equal to 1 mol%, wherein: MgO+ZnO is greater than or equal to 0.1 mol% and less than or equal to 6 mol%. The glass composition according to claim 1, wherein the glass composition contains MgO greater than or equal to 0.1 mol % and less than or equal to 5 mol %. The glass composition according to any one of claims 1 or 2, wherein the glass composition contains Au greater than or equal to 1×10 ⁻⁶ mol % and less than or equal to 0.01 mol %. The glass composition according to any one of claim 1 or 2, wherein the glass composition is characterized by at least one of the following: R ₂ O-Al ₂ O ₃ is greater than or equal to -3 mol% and less Less than or equal to 2 mol%, R ₂ O is greater than or equal to 2 mol% and less than or equal to 35 mol%, wherein R ₂ O is the sum of Li ₂ O, Na ₂ O, and K ₂ O, And MgO+ZnO is greater than or equal to 0.5 mol% and less than or equal to 5.5 mol%. The glass composition according to any one of claims 1 or 2, wherein the glass composition comprises at least one of the following: greater than or equal to 0.1 mol% and less than or equal to 2 mol% of ZrO ₂ , greater than Or equal to 0.01 mol% and less than or equal to 1 mol% of SnO ₂ , and greater than or equal to 0.1 mol% and less than or equal to 1 mol% of K ₂ O. The glass composition according to any one of claims 1 or 2, wherein 5.72*Al ₂ O ₃ (mol%)-21.4*ZnO (mol%)-2.5*P ₂ O ₅ (mol%) )-35*Li ₂ O (mol%)-16.6*B ₂ O ₃ (mol%)-20.5*MgO (mol%)-23.3*Na ₂ O (mol%)-27.9*SrO (mol mol%)-18.5*K ₂ O (mol%)-26.3*CaO (mol%) is greater than -609 mol%. A colored glass product comprising: greater than or equal to 40 mol % and less than or equal to 70 mol % of SiO ₂ ; greater than or equal to 8 mol % and less than or equal to 20 mol % of Al ₂ O ₃ ; greater than or equal to or equal to 1 mol% and less than or equal to 10 mol% of _B2O3 ; greater than or equal to 1 mol% and less than or equal to 20 mol% _{of Li2O} ; greater than or equal to 1 mol% and 15 mol% or less of _Na2O ; greater than or equal to 0 mol% and less than or equal to 6 mol% of MgO; greater than or equal to 0 mol% and less than or equal to 5 mol% of ZnO and Au greater than or equal to 1×10 ⁻⁶ mol% and less than or equal to 1 mol%, wherein: MgO+ZnO is greater than or equal to 0.1 mol% and less than or equal to 6 mol%. The colored glass article of claim 7, wherein the colored glass article has a transmission color coordinate in the CIELAB color space measured at an article thickness of 1.33 mm under F2 illumination and a standard observer angle of 10°, wherein : L* is greater than or equal to 65 and less than or equal to 98; a* is greater than or equal to -10 and less than or equal to 25; and b* is greater than or equal to -20 and less than or equal to 5. The colored glass product according to any one of claim 7 or 8, wherein a thickness of the colored glass product is greater than or equal to 250 μm and less than or equal to 6 mm. The colored glass article according to any one of claims 7 or 8, wherein the colored glass article is an ion-exchanged colored glass article, and the ion-exchanged glass article is characterized by at least one of the following: A compression depth of 3 μm or greater, a thickness "t" and a compression depth greater than or equal to 0.15t, A surface compressive stress greater than or equal to 300 MPa, and A maximum central tension greater than or equal to 40 MPa.

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