WO1995009132A1 - Lead-free glaze or enamel for use on ceramic bodies - Google Patents
Lead-free glaze or enamel for use on ceramic bodies Download PDFInfo
- Publication number
- WO1995009132A1 WO1995009132A1 PCT/US1994/010511 US9410511W WO9509132A1 WO 1995009132 A1 WO1995009132 A1 WO 1995009132A1 US 9410511 W US9410511 W US 9410511W WO 9509132 A1 WO9509132 A1 WO 9509132A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frit
- weight percent
- cao
- set forth
- ceramic body
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/22—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions containing two or more distinct frits having different compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
Definitions
- This invention relates to a lead-free glaze or enamel. More particularly, the invention concerns a lead-free glaze or enamel for use on ceramic bodies used to produce articles such as chinaware or dinnerware.
- glazes and enamels for use on ceramic bodies are well-known in the ceramic art.
- Such glazes and enamels generally comprise a vehicle and one or more glass frits.
- a glaze is typically thought of as a clear coating
- an enamel is a glaze which contains a pigment or similar particles in suspension.
- Such glazes and enamels are applied to the surfaces of a green, partially, or fully fired ceramic body in the form of a paste. After application of the glaze or enamel to the surface of the ceramic body by silk screening or other conventional techniques, the coated ceramic body is fired to cure the ceramic body, bond the glaze or enamel to the surface of the ceramic body, and volatilize the vehicle.
- the present invention concerns a lead-free composition for use in forming a coating on ceramic bodies and a method of using the same.
- the lead-free composition comprises a hard glass frit, a flux frit, and a clay.
- a vehicle is generally included to facilitate the application of the composition.
- the hard frit comprises by weight percent from about 45% to about 70% Si0 2 , from about 4% to about 15% B 2 0 3 , from about 4% to about 17% A1 2 0 3 , from about 1% to about 9% Na 2 0, from about 1% to about 9% K 2 0, from about .2% to about 5% Li 2 0, from about .4% to about 12% CaO, from about .1% to about 7% Zr0 2 , up to about 3% ZnO, up to about 2% 0 3 , up to about 2% Bi 2 0 3 , and up to about 2% Mo0 3 .
- the flux frit comprises in weight percent from about 40% to about 52% Si0 2 , from about 17% to about 26% B 2 0 3 , from about 2% to about 10% A1 2 0 3 , from about 6% to about 14% Na 2 0, from about .5% to about 3% K 2 0, up to about 3% MgO and from about 8% to about 17% CaO.
- the clay comprises from about 40% to about 55% Si0 2 , from about 20% to about 45% A1 2 0 3 , up to about 5% Na 2 0, up to about 5% K 2 0, up to about 5% MgO and up to about 5% CaO.
- the solids portion of the glaze or enamel comprises in weight percent from about 70% to about 95% hard frit, from about 2% to about 10% flux frit, and from about 4% to about 18% clay.
- This invention concerns lead-free and cadmium-free glazes and glass enamels which possess excellent resistance to both alkali and acid environments and moderate firing or maturation temperatures.
- the glazes and enamels also display good gloss, and a coefficient of thermal expansion that is compatible with a china ceramic body.
- lead-free and cadmium-free mean no intentional addition of cadmium or lead, and less than .005% by weight lead or cadmium, respectively.
- the glazes and enamels of the present invention are especially adapted for use on green ceramic bodies such as those used to produce chinaware or dinnerware, or fine bone china.
- the glazes and enamels of the present invention are especially well suited for use on fine bone china.
- Bone china may be produced utilizing various compositions to form the ceramic body.
- bone china is a ceramic ware which is generally formed by firing a composition comprising about 47% calcined bone, about 27% china clay, and about 30% china stone.
- the maturation temperature of the glazes and enamels of the present invention are well below the temperature at which a china ceramic body thermally deforms.
- the glazes and enamels of the present invention may be fired between about 1000°C to about 1200°C using conventional furnaces or kilns.
- the glaze or enamel compositions of the present invention comprise a hard glass frit, a flux glass frit, and a clay.
- the glass frits of the present invention can be melted in conventional refractory crucibles at 1400-1600°C with little attack on the crucibles.
- the glass melt may be handled by any suitable conventional means though typically it is quenched by steel rolls into flake or frit, using techniques well-known to those skilled in the art.
- the enamels and glazes of the present invention include a hard glass frit having the following compositions:
- the hard glass frit contains some Zr0 2 to enhance alkali durability, but preferably the Zr0 2 level is not so high so as to induce crystallization, which manifests itself as a dull or f°ggy coating.
- the hard glass frit preferably includes a maximum of 3- ⁇ r>y weight ZnO, preferably a maximum of 2.5% by weight ZnO, and more preferably a maximum of 2% by weight ZnO.
- the hard glass frit contains a maximum of 2% by weight, and preferably a maximum of 1% by weight, of each of tungsten oxide (W0 3 ) , bismuth oxide (Bi 2 0 3 ) , and molybdenum oxide(Mo0 3 ) . More preferably, the hard glass frit contains substantially no tungsten oxide, bismuth oxide, or molybdenum oxide.
- the enamels and glazes of the present invention include a flux frit having the following compositions:
- clays Any number of commercially available clays may be used to produce the enamels and glazes of the present invention.
- Such clays include the following compositions:
- the hard frit, flux frit, and clay define or form the "solids portion” of the glaze or enamel.
- the glaze or enamel may / include other additives such as vehicles, flocculants, deflocculants, binders, wetting agents, antifoaming agents, dyes, and pigments.
- the enamels or glazes are made according to the following technique.
- the glass frits hard frit and flux frit
- the resulting slip which comprises generally about 35% water, is screen printed, hand printed, sprayed, brushed, or otherwise applied on the ceramic body by methods known in the art, and then fired using conventional firing techniques.
- the amount of water utilized in the slip can be varied to best accommodate the application technique being utilized.
- other conventional vehicles may be employed. Firing times greatly depend on such factors as the previous firing history of the ceramic body, furnace conditions, and the size of the charge or load placed in the furnace. However, generally, the coated ceramic bodies are fired for a period of 4 to 12 hours.
- the "solids portion" of the glaze or enamel yields a coating composition comprising by weight from about 50% to about 66% Si0 2 , from about 6% to about 12% B 2 0 3 , from about 10% to about 15% A1 2 0 3 , from about .25% to about 2.5% Li 2 0, from about 2.5% to about 7% Na 2 0, from about 2.5% to about 6.5% K 2 0, from about 7% to about 9% CaO, and up to 4% Zr0 2 .
- the coating includes some Zr0 2 ; and a maximum of 3% by weight ZnO, preferably a maximum of 2.5% by weight ZnO, and more preferably a maximum of 2% by weight ZnO.
- the coating contains a maximum of 2% by weight, and preferably a maximum of 1% by weight of each of W0 3 , Bi 2 0 3 , and Mo0 3 . More preferably, the coating contains substantially no W0 3 , Bi 2 0 3 , and Mo0 3 .
- the glazes and enamels of the present invention exhibit excellent alkaline durability.
- Alkaline durability may be determined in various manners.
- One known method is to immerse pieces of ceramic that have been coated and fired with the glaze or enamel in a heated, stirred, alkaline, dishwasher detergent solution (e.g., a group 4 detergent such as British Calgonite) .
- the detergent solution is prepared by creating a .5% by weight concentration of Calgonite using deionized or distilled water. After the 32 hours of exposure, the samples are removed from the solution, dried, and then rubbed with a metal object such as a silver spoon.
- the following evaluation scale is utilized to evaluate the marked glass or enamel:
- Glazes or enamels made in accordance with the principles of the present invention exhibit "No marking” or a "Very slightly marked” condition after 32 hours of exposure to the detergent solution.
- Example 1 ::
- a glaze composition is produced utilizing a hard glass frit indicated in Table I as Formulation A, a flux glass frit as indicated in Table II, and a clay as indicated in Table
- the glass frits and clay are prepared as a slip by ball milling the glass frits and clay in- water until a particle size of about 3 microns- to about 4..microns, as determined by a Microtrac at a 50% context level, is achieved.
- the slip comprises about 35% water.
- the slip is then applied by spraying to 6" conventional bone china bisque fired plates and then fired at
- Example 2 A second glaze composition is prepared by using Formula
- Example 3 A third glaze composition is prepared by using Formula C in Table I, the flux frit of Table II, and the clay of Table III, and by following the steps set forth in Example 1.
- Example 4 A fourth glaze composition is prepared by using Formula D in Table I, the flux frit of Table II, and the clay of Table III, and by following the steps set forth in Example 1.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94928612A EP0721431A4 (en) | 1993-09-29 | 1994-09-19 | Lead-free glaze or enamel for use on ceramic bodies |
AU77983/94A AU7798394A (en) | 1993-09-29 | 1994-09-19 | Lead-free glaze or enamel for use on ceramic bodies |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/128,905 US5447891A (en) | 1993-09-29 | 1993-09-29 | Lead-free glaze or enamel for use on ceramic bodies |
US08/128,905 | 1993-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995009132A1 true WO1995009132A1 (en) | 1995-04-06 |
Family
ID=22437557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1994/010511 WO1995009132A1 (en) | 1993-09-29 | 1994-09-19 | Lead-free glaze or enamel for use on ceramic bodies |
Country Status (4)
Country | Link |
---|---|
US (1) | US5447891A (en) |
EP (1) | EP0721431A4 (en) |
AU (1) | AU7798394A (en) |
WO (1) | WO1995009132A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999005070A1 (en) * | 1997-07-23 | 1999-02-04 | British Ceramic Research Limited | Lead-free glaze for ceramic articles |
CN109734314A (en) * | 2019-03-06 | 2019-05-10 | 盐城工业职业技术学院 | A kind of acid and alkali-resistance ceramic glaze and preparation method thereof |
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JP3067580B2 (en) * | 1995-04-04 | 2000-07-17 | 株式会社村田製作所 | Insulating paste and thick-film printed multilayer circuit using the same |
US5559059A (en) * | 1995-05-22 | 1996-09-24 | Cerdec Corporation | Lead-free glass frits for ceramics enamels |
US5629247A (en) * | 1996-05-08 | 1997-05-13 | The O'hommel Company | High bismuth oxide based flux and paint compositions for glass substrates |
DE19721737C1 (en) * | 1997-05-24 | 1998-11-12 | Schott Glas | Lead- and cadmium-free glass composition for glazing, enamelling and decorating glasses or glass ceramics as well as processes for the production of a glass ceramic coated with them |
ES2196243T3 (en) | 1997-11-27 | 2003-12-16 | Ferro Italia Srl | CERAMIC TILE AND ENAMEL FOR USE IN A TILE OF THIS TYPE. |
DE19834801C2 (en) * | 1998-08-01 | 2002-08-08 | Schott Glas | Lead and cadmium-free glass composition for glazing, enamelling and decorating glasses or glass ceramics as well as processes for the production of a glass ceramic coated with them |
US6525300B1 (en) | 1999-07-30 | 2003-02-25 | Schott Glas | Cooking surface for cooking food having a glass ceramic surface with a glass coating thereon |
KR20050025182A (en) * | 2002-05-16 | 2005-03-11 | 쇼오트 아게 | Uv-blocking borosilicate glass, the use of the same, and a fluorescent lamp |
JP4014468B2 (en) * | 2002-08-07 | 2007-11-28 | 株式会社ノリタケカンパニーリミテド | Lead-free glass flux and painting material containing the flux |
EP1426345A1 (en) * | 2002-12-03 | 2004-06-09 | Corning Incorporated | Borosilicate glass compositions and uses therof |
JP4795651B2 (en) * | 2003-06-06 | 2011-10-19 | ショット アクチエンゲゼルシャフト | Highly chemical-resistant UV-absorbing glass, particularly for fluorescent lamps, manufacturing method and method of use |
US7037868B2 (en) * | 2003-12-10 | 2006-05-02 | Ferro Corporation | Transparent tile glaze |
DE102005004068B4 (en) * | 2005-01-24 | 2008-01-17 | Schott Ag | Lead- and cadmium-free glass and process for glazing, enamelling and decorating of glasses or glass-ceramics as well as use of the glass |
GB0612316D0 (en) * | 2006-06-21 | 2006-08-02 | United States Borax Inc | Glaze compositions |
GB2455974A (en) * | 2007-12-20 | 2009-07-01 | United States Borax Inc | Boron-containing compositions |
DE102008001496A1 (en) * | 2008-04-30 | 2009-11-05 | Schott Ag | Borosilicate glass, useful in pharmaceutical packaging, comprises silicon dioxide, boron oxide, aluminum oxide, titanium dioxide, lithium oxide, potassium oxide, sodium oxide, alkaline earth oxide, zirconium oxide and ferric oxide |
DE102008043317B4 (en) * | 2008-10-30 | 2013-08-08 | Schott Ag | Use of a solarization-resistant glass with a defined slope of the UV edge for a spotlight for weathering systems |
CN101428967A (en) * | 2008-12-08 | 2009-05-13 | 姜荣庆 | Leadless glass envelope for electronic product |
CN102219382B (en) * | 2011-03-31 | 2013-06-26 | 广东道氏技术股份有限公司 | Frit for full polish and preparation method thereof |
US9290409B2 (en) * | 2012-12-23 | 2016-03-22 | King Abdulazia City for Science and Technology (KACST) | Glaze composition, method for manufacturing the glaze composition and methods of glazing |
JP6047457B2 (en) * | 2013-07-16 | 2016-12-21 | 株式会社ノリタケカンパニーリミテド | Porcelain frit bowl |
CN104058592B (en) * | 2014-06-27 | 2016-08-24 | 莱芜钢铁集团有限公司 | The preparation method of a kind of enamel coating and the enamel coating prepared |
JP2017024954A (en) * | 2015-07-24 | 2017-02-02 | 株式会社ノリタケカンパニーリミテド | Glass flux for overglaze colorant and overglaze colorant |
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US2063252A (en) * | 1934-02-09 | 1936-12-08 | Titanium Alloy Mfg Co | Vitreous enamel and method of making same |
US2278867A (en) * | 1940-05-01 | 1942-04-07 | Du Pont | Lead-free glaze of low maturing temperature for use in decorating ceramic ware |
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GB8623214D0 (en) * | 1986-09-26 | 1986-10-29 | Pilkington Brothers Plc | Glass compositions |
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1993
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-
1994
- 1994-09-19 WO PCT/US1994/010511 patent/WO1995009132A1/en not_active Application Discontinuation
- 1994-09-19 AU AU77983/94A patent/AU7798394A/en not_active Abandoned
- 1994-09-19 EP EP94928612A patent/EP0721431A4/en not_active Withdrawn
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US3784384A (en) * | 1964-03-17 | 1974-01-08 | Atomic Energy Commission | High temperature ceramic composition for hydrogen retention |
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Title |
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See also references of EP0721431A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999005070A1 (en) * | 1997-07-23 | 1999-02-04 | British Ceramic Research Limited | Lead-free glaze for ceramic articles |
CN109734314A (en) * | 2019-03-06 | 2019-05-10 | 盐城工业职业技术学院 | A kind of acid and alkali-resistance ceramic glaze and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
EP0721431A4 (en) | 1996-11-20 |
EP0721431A1 (en) | 1996-07-17 |
AU7798394A (en) | 1995-04-18 |
US5447891A (en) | 1995-09-05 |
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