WO2021145258A1 - 化学強化ガラス物品およびその製造方法 - Google Patents

化学強化ガラス物品およびその製造方法 Download PDF

Info

Publication number
WO2021145258A1
WO2021145258A1 PCT/JP2021/000250 JP2021000250W WO2021145258A1 WO 2021145258 A1 WO2021145258 A1 WO 2021145258A1 JP 2021000250 W JP2021000250 W JP 2021000250W WO 2021145258 A1 WO2021145258 A1 WO 2021145258A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass
depth
compressive stress
less
chemically strengthened
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/000250
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
一樹 金原
健二 今北
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Inc
Original Assignee
Asahi Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to CN202180008747.XA priority Critical patent/CN114929641A/zh
Priority to JP2021571159A priority patent/JP7420152B2/ja
Publication of WO2021145258A1 publication Critical patent/WO2021145258A1/ja
Priority to US17/805,031 priority patent/US12195387B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • 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
    • C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
    • C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
    • C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
    • 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal

Definitions

  • the present invention relates to chemically strengthened glass articles.
  • Chemically tempered glass is used for the cover glass of mobile terminals and the like.
  • the glass is brought into contact with a molten salt such as sodium nitrate to cause ion exchange between the alkali metal ions contained in the glass and the alkali metal ions having a larger ionic radius contained in the molten salt.
  • a compressive stress layer is formed on the surface of the glass.
  • the strength of chemically strengthened glass strongly depends on the stress profile expressed by the compressive stress value with the depth from the glass surface as a variable.
  • the cover glass of a mobile terminal or the like may be broken due to deformation such as when dropped. In order to prevent such fracture, that is, fracture due to the bending mode, it is effective to increase the compressive stress on the glass surface. In addition, the cover glass of a mobile terminal or the like may break due to a collision with a protrusion when the terminal falls on asphalt or sand. In order to prevent such fracture, that is, fracture due to the impact mode, it is effective to increase the depth of the compressive stress layer to form the compressive stress layer deeper in the glass.
  • Patent Document 1 describes a method of performing two-step chemical strengthening using an alkaline aluminoborosilicate glass containing lithium. According to the method, a large compressive stress due to sodium-potassium exchange can be generated in the surface portion of the glass, and a slightly small compressive stress can be generated in the deeper portion due to the lithium-sodium exchange. It was considered that this would suppress both the fracture caused by the bending mode and the fracture caused by the impact mode.
  • Patent Document 2 describes that by performing a three-step ion exchange treatment, a chemically strengthened glass having high drop strength and hard to scatter fragments when broken can be obtained.
  • the chemically strengthened glass described in Patent Documents 1 and 2 may have insufficient strength.
  • An object of the present invention is to provide a chemically strengthened glass article having excellent strength and suppressing scattering of fragments at the time of fracture.
  • the present invention is a chemically strengthened glass article having a first surface, a second surface facing the first surface, and an end portion in contact with the first surface and the second surface.
  • the compressive stress value on the first surface is 400 MPa or more and the compressive stress value inside the glass is expressed with the depth from the first surface as a variable, the thickness of the glass is t ( ⁇ m).
  • compressive stress value in the first depth from the surface (0.05 ⁇ t) ⁇ (0.15 ⁇ t) compressive stress value in the range of ⁇ m is the maximum depth D B is the first surface in the range up to a depth D B from greater than the compression stress value in the depth D a compressive stress value is minimized, the tensile stress value at a depth of (0.5 ⁇ t) ⁇ m from the first surface
  • a chemically strengthened glass article having a compressive stress layer depth of (0.23 ⁇ t) ⁇ m or more and 125 MPa or less.
  • the chemically strengthened glass article is preferably made of lithium aluminosilicate glass.
  • a glass plate made of lithium aluminosilicate glass is immersed in a sodium-containing molten salt at 380 ° C. to 500 ° C. for 1 to 8 hours, and the sodium-containing molten salt is contained in the molten salt.
  • a method for producing a chemically strengthened glass article which comprises 50% by mass or more of sodium ions, with the mass of the metal ions of 100% by mass being 100% by mass, and then immersing a glass plate in a lithium-containing molten salt.
  • FIG. 1 is a diagram showing a stress profile of a chemically strengthened glass article.
  • FIG. 2 is a diagram showing a stress profile of a chemically strengthened glass article.
  • FIG. 3 is a diagram showing a stress profile of a chemically strengthened glass article.
  • the stress profile can be measured by a method using a combination of an optical waveguide surface stress meter and a birefringence stress meter. It is known that the method using an optical waveguide surface stress meter can accurately measure the stress of glass in a short time.
  • an optical waveguide surface stress meter for example, there is FSM-6000 manufactured by Orihara Seisakusho. High-precision stress measurement is possible by combining FSM-6000 with the attached software Fsm-V.
  • the optical waveguide surface stress meter can measure the stress only when the refractive index decreases from the sample surface to the inside.
  • the layer obtained by replacing the sodium ion inside the glass with an external potassium ion has a lower refractive index from the sample surface toward the inside, so that the stress can be measured with an optical waveguide surface stress meter.
  • the stress of the layer obtained by substituting the lithium ion inside the glass article with the sodium ion outside cannot be measured by the optical waveguide surface stress meter. Therefore, when the lithium-containing glass article is subjected to ion exchange treatment using a sodium-containing molten salt, the depth ( DK ) at which the compressive stress value measured by the optical waveguide surface stress meter becomes zero is Not true compressive stress layer depth.
  • the method using a birefringence stress meter can measure stress regardless of the refractive index distribution.
  • the birefringence stress meter for example, there is a birefringence imaging system Abrio-IM manufactured by Cri.
  • Abrio-IM manufactured by Cri.
  • chemically strengthened glass refers to glass after being chemically strengthened
  • chemically strengthened glass refers to glass before being chemically strengthened
  • matrix composition of chemically strengthened glass is the glass composition of chemically strengthened glass, and is obtained from the compressive stress layer depth DOL of chemically strengthened glass except when an extreme ion exchange treatment is performed.
  • the glass composition of the deep part can be regarded as the same as the mother composition of chemically strengthened glass.
  • the glass composition is expressed in terms of mass% based on oxides unless otherwise specified, and mass% is simply expressed as "%".
  • mass% in this specification is synonymous with weight%.
  • substantially not contained means that the content is below the level of impurities contained in raw materials and the like, that is, it is not intentionally contained. Specifically, for example, it is less than 0.1%.
  • the chemically strengthened glass article of the present invention (hereinafter, may be referred to as "the present tempered glass” or “the present tempered glass article”) has a first surface, a second surface facing the first surface, and a first surface. It has an end that touches the surface of the glass and the second surface, respectively.
  • the tempered glass article is usually in the shape of a flat plate, but may be in the shape of a curved surface.
  • the compressive stress value (CS 0 ) on the first surface is 400 MPa or more, preferably 700 MPa or more, more preferably 800 MPa or more, further preferably 900 MPa or more, further preferably 950 MPa or more, and more preferably 1000 MPa or more.
  • the larger CS 0 the more "destruction due to bending mode" can be prevented.
  • the edges may be chipped after chemical strengthening. This phenomenon is sometimes called delayed chipping. From the viewpoint of preventing this, CS 0 is preferably 1300 MPa or less, more preferably 1200 MPa or less, and even more preferably 1000 MPa or less.
  • the plate thickness (t) of the tempered glass article is preferably 100 ⁇ m or more, more preferably 200 ⁇ m or more, further preferably 400 ⁇ m or more, further preferably 600 ⁇ m or more, and particularly preferably 700 ⁇ m or more.
  • t is preferably 2000 ⁇ m or less, more preferably 1000 ⁇ m or less in order to reduce the weight.
  • the compressive stress layer depth (DOL) of the chemically strengthened glass plate obtained by a general method is (0.21 ⁇ t) ⁇ m or less. This is because the total amount of compressive stress and tensile stress becomes balanced in the entire glass plate.
  • the present inventors have found that in order to suppress fracture due to the impact mode, the compressive stress value at a depth of about 80 ⁇ m from the first surface is high, and the region containing the compressive stress is formed. A profile of (0.23 ⁇ t) ⁇ m or more was considered to be effective. It is assumed that the thickness t of the glass at this time is 200 ⁇ m or more.
  • the thickness t of the glass is preferably 300 ⁇ m or more, more preferably 350 ⁇ m or more.
  • This tempered glass article is characterized in that the DOL is larger than that of the conventional chemically tempered glass, and is less likely to be scratched when dropped.
  • the compressive stress layer depth (DOL) of the tempered glass article is preferably (t ⁇ 0.23) ⁇ m or more, more preferably (t ⁇ 0.235) ⁇ m or more, and further preferably (t ⁇ 0.24) ⁇ m. That is all.
  • the larger the DOL with respect to t the greater the effect of chemical strengthening.
  • the internal tensile stress (CT) becomes large and the fragments are likely to scatter at the time of fracture.
  • the DOL is preferably (t ⁇ 0.26) ⁇ m or less, and more preferably (t ⁇ 0.255) ⁇ m or less.
  • the DOL is more preferably (t ⁇ 0.25) ⁇ m or less.
  • the DOL is preferably 80 ⁇ m or more. Even when a glass article falls on a slightly rough asphalt paved road, if the DOL is 80 ⁇ m or more, cracking due to an impact at the time of a collision can be suppressed.
  • the depth from the first surface to D K In the tempered glass article of points compressive stress value measured by the optical waveguide surface stress meter becomes zero, the depth from the first surface to D K. Further, the compression stress value in the depth D B from the first surface is 0 greater, and if the compression stress value in the depth D A from the first surface is less than 0, the first surface a depth range up to D B, the depth of the compression stress value measured by the optical waveguide surface stress meter is zero there are two points.
  • the depth (DK ) in this case means the depth from the first surface of the shallower of the two points.
  • a depth ( DK ) of 3 ⁇ m or more is preferable because fracture due to the bending mode can be suppressed. DK is more preferably 4 ⁇ m or more, still more preferably 5 ⁇ m or more.
  • D K is too large, preferably 20 ⁇ m or less since there is a risk that CT is increased, more preferably 15 ⁇ m or less, more preferably 10 ⁇ m or less. Between the D K and DOL has normally positive correlation, there is a tendency as DOL larger D K is large.
  • the tempered glass article is made of glass in a depth range of (0.05 ⁇ t) to (0.15 ⁇ t) ⁇ m from the first surface with respect to the plate thickness (t).
  • deep stress is maximum is set to D B, the compression stress value in the depth D B and CS B.
  • D B the compression stress value in the depth D B and CS B.
  • D A the compression stress value in the depth D A and CS A.
  • the stress profile of the tempered glass article preferably has a point where the compressive stress value is maximized in the range where the depth from the first surface is 5 ⁇ m or more and DOL or less.
  • the depth from the first surface of the point at which the local maximum is D B.
  • Also has a point at which depth from the first surface is compressive stress value is the minimum in the range less than 0 D B, is a D A depth from the first surface of the point at which its minimum ..
  • CS B > CS A.
  • CS A is greater than or equal to -50 MPa, 0 MPa greater is more preferable.
  • CS A in order to prevent "breaking due to bending mode", it is important that a large compressive stress value in the relatively shallow region depth from the first surface, CS A Is not too small, so that the destruction due to the bending mode is effectively suppressed. Meanwhile, crushing number of glass increases when the cracked glass when CS A is too high. Therefore CS A is preferably not more than 200 MPa.
  • the compressive stress value is large when the depth from the first surface is 50 ⁇ m to 80 ⁇ m in order to suppress the fracture due to the impact mode.
  • the present inventors considered that the compressive stress value in the region where the depth from the first surface is 10 ⁇ m or more and less than 50 ⁇ m does not contribute much to the suppression of fracture. Therefore, it was considered that it is beneficial to form the minimum point of the compressive stress value within the range where the depth from the first surface is 10 ⁇ m or more and less than 50 ⁇ m in order to utilize the compressive stress without waste.
  • the depth D A of the minimum point is preferably less than 10 [mu] m 50 [mu] m.
  • D A is more preferably equal to or greater than 15 [mu] m, and even more preferably 18 [mu] m. Further, more preferably less than 30 ⁇ m depth D A, more preferably 25 ⁇ m or less, even more preferably from 20 [mu] m. It is assumed that the thickness t of the glass at this time is 200 ⁇ m or more.
  • the compressive stress value CS 80 at a depth of 80 ⁇ m from the first surface is 50 MPa or more, fracture due to the impact mode can be suppressed, which is preferable. More preferably, it is 60 MPa or more.
  • the compressive stress value CS 80 is preferably 200 MPa or less, more preferably 150 MPa or less.
  • the compressive stress value here is a value measured by a birefringence stress meter. Further, it is assumed that the thickness t of the glass is 200 ⁇ m or more.
  • the compressive stress value CS 80 at a depth of 80 ⁇ m from the first surface of the glass article is preferably (t ⁇ 0.1) MPa or more with respect to the thickness t ⁇ m of the glass.
  • the larger the CS 80 the better in order to suppress the destruction caused by the impact mode.
  • the tensile stress value CT at a depth (0.5 ⁇ t) ⁇ m from the first surface of the glass article is 125 MPa or less, which makes it difficult for severe crushing to occur.
  • the depth (0.5 ⁇ t) ⁇ m corresponds to the central portion in the thickness direction of the glass, and the tensile stress value at such a depth means the tensile stress value inside the glass.
  • the tensile stress value is preferably 110 MPa or less, more preferably 100 MPa or less. Further, the tensile stress value is preferably 50 MPa or more, more preferably 75 MPa or more, in order to provide sufficient reinforcement that makes it difficult to crack when dropped.
  • the tempered glass article is preferably made of lithium aluminosilicate glass.
  • Lithium aluminosilicate glass can generate a large compressive stress due to sodium-potassium exchange on the surface portion of the glass, and a slightly smaller compressive stress due to the lithium-sodium exchange on the deeper portion. Therefore, it is said that both the fracture due to the bending mode and the fracture due to the collision mode due to the collision with the protrusion can be suppressed.
  • the glass composition in the central portion in the thickness direction that is, the base composition of the chemically tempered glass is expressed in mass%. Containing 50% or more of SiO 2 and 5% or more of Al 2 O 3
  • the total content of Li 2 O, Na 2 O and K 2 O is 5% or more.
  • the content of Li 2 O, Li 2 O, molar ratio of the total content of Na 2 O and K 2 O is 0.5 or more Is preferable.
  • the glass composition in the central portion in the thickness direction is more preferably as follows. SiO 2 50-70%, Al 2 O 3 5-30%, B 2 O 3 0 ⁇ 10% , P 2 O 3 0 ⁇ 10% , Y 2 O 3 0 ⁇ 10% , Li 2 O 3 to 15%, Na 2 O 0-10%, K 2 O 0-10%, (MgO + CaO + SrO + BaO) 0 to 10%, and (ZrO 2 + TiO 2 ) 0 to 5%. Since the glass composition in the central portion in the thickness direction can be regarded as the same as the composition of the chemically strengthened glass, the details of this preferable glass composition will be described in the section of the chemically strengthened glass.
  • the chemically strengthened glass article of the present invention is particularly useful as a cover glass used for mobile devices such as mobile phones and smartphones. Further, it is also useful for cover glass of display devices such as televisions, personal computers and touch panels, wall surfaces of elevators, and wall surfaces (full-scale displays) of buildings such as houses and buildings, which are not intended to be carried. It is also useful as a building material such as a window glass, a table top, an interior of an automobile or an airplane, a cover glass thereof, or a housing having a curved surface shape.
  • This tempered glass article can be produced by subjecting a chemically strengthened glass article, which will be described later, to an ion exchange treatment.
  • the chemically strengthened glass can be produced by using a general glass manufacturing method such as the following.
  • the glass raw materials are appropriately mixed and heated and melted in a glass melting kiln so that a glass having a preferable composition can be obtained. Then, the glass is homogenized by bubbling, stirring, addition of a clarifying agent, etc., formed into a glass plate having a predetermined thickness, and slowly cooled. Alternatively, it may be formed into a plate shape by a method of forming it into a block shape, slowly cooling it, and then cutting it.
  • Examples of the method for forming into a plate shape include a float method, a press method, a fusion method and a down draw method.
  • the float method is preferable.
  • continuous molding methods other than the float method for example, the fusion method and the down draw method are also preferable.
  • the glass ribbon obtained by molding is ground and polished as necessary to form a glass plate.
  • the end face is subjected to the chemical strengthening treatment.
  • a compressive stress layer is formed, which is preferable.
  • the formed glass plate is subjected to a chemical tempering treatment, and then washed and dried to obtain a chemically strengthened glass.
  • the chemical strengthening treatment involves contacting the glass with the metal salt, such as by immersing it in a melt of a metal salt (eg, potassium nitrate) containing metal ions (typically sodium or potassium ions) with a large ion radius.
  • a metal salt eg, potassium nitrate
  • metal ions typically sodium or potassium ions
  • Metal ions with a small ion radius in glass typically lithium or sodium ions
  • metal ions with a large ion radius in metal salts typically sodium or potassium ions for lithium ions
  • the present invention also utilizes the action of exchanging a metal ion (potassium ion) having a large ionic radius in glass and a metal ion (sodium ion) having a small ionic radius in a metal salt.
  • the method of utilizing "Li-Na exchange” for exchanging lithium ions in glass for sodium ions is preferable because the chemical strengthening treatment speed is high. Further, in order to form a large compressive stress by ion exchange, a method using "Na-K exchange” in which sodium ions in glass are exchanged with potassium ions is preferable. Further, in order to create a stress profile having a positive inclination in a region having a depth of 10 to 80 ⁇ m from the first surface, sodium ions once placed in the glass are exchanged with lithium ions in the molten salt again, “Na-”. It is preferable to use "Li exchange". A stress profile having a positive inclination in a region having a depth of 10 to 80 ⁇ m from the first surface is synonymous with satisfying the above-mentioned relationship of CS B > CS A.
  • Examples of the molten salt for performing the chemical strengthening treatment include nitrates, sulfates, carbonates, chlorides and the like.
  • examples of nitrate include lithium nitrate, sodium nitrate, potassium nitrate, cesium nitrate, silver nitrate and the like.
  • examples of the sulfate include lithium sulfate, sodium sulfate, potassium sulfate, cesium sulfate, silver sulfate and the like.
  • Examples of the carbonate include lithium carbonate, sodium carbonate, potassium carbonate and the like.
  • Examples of chlorides include lithium chloride, sodium chloride, potassium chloride, cesium chloride, silver chloride and the like.
  • the tempered glass article can be manufactured by the tempering treatment method described below (hereinafter, referred to as "the tempered treatment method").
  • This strengthening treatment method includes a step of immersing the glass plate in a sodium-containing reinforced molten salt (hereinafter, also referred to as a sodium-containing reinforced salt).
  • a sodium-containing reinforced molten salt hereinafter, also referred to as a sodium-containing reinforced salt.
  • the sodium-containing fortified salt preferably contains 50% by mass or more of sodium ions, more preferably 75% by mass or more, assuming that the mass of the metal ions contained in the fortified salt is 100% by mass.
  • the sodium-containing fortified salt may contain lithium ions, but in order to obtain sufficient compressive stress, the lithium ions are preferably 1% by mass or less, more preferably 0.5% by mass or less. Further, in order to sufficiently suppress the bending stress of the glass generated at the time of a drop impact, the sodium-containing reinforcing salt preferably contains potassium ions.
  • a sodium-containing nitrate is preferable from the viewpoint of ease of handling such as boiling point and danger.
  • This strengthening treatment method then includes a step of immersing the glass plate in a lithium-containing molten salt (hereinafter, also referred to as a lithium-containing strengthened salt).
  • a stress profile having a positive inclination can be created in a region having a depth of 10 to 80 ⁇ m from the first surface.
  • the lithium-containing fortified salt is preferably a salt containing 0.5% by mass or more of lithium ions, and more preferably 1% by mass or more, assuming that the mass of the metal ions contained in the fortified salt is 100% by mass.
  • the amount of lithium ions in the reinforcing salt is too large, sufficient chemical strengthening stress is not applied to the glass.
  • the lithium ion content is preferably 15% by mass or less, and more preferably 10% by mass or less.
  • the lithium-containing fortified salt preferably contains sodium nitrate, and may contain nitrates of alkali metals and alkaline earth metals such as potassium nitrate, magnesium nitrate and lithium nitrate as components other than sodium nitrate.
  • the lithium-containing fortified salt does not contain sodium, it preferably contains potassium, and more preferably potassium nitrate.
  • a salt containing 80% by mass or more of potassium ion is preferable, a salt containing 85% by mass or more is more preferable, and a salt containing 90% by mass or more is further preferable.
  • the lithium-containing fortified salt contains 80% by mass or more of potassium, the step of immersing in the potassium-containing molten salt (hereinafter, also referred to as potassium-containing fortified salt) described later may be omitted.
  • this strengthening treatment method it is preferable to immerse the glass plate in a sodium-containing strengthening salt at 380 ° C. to 500 ° C.
  • a sodium-containing strengthening salt at 380 ° C. to 500 ° C.
  • the temperature of the sodium-containing fortified salt is 380 ° C. or higher, ion exchange easily proceeds, which is preferable. More preferably, it is 400 ° C. or higher. Further, it is preferable that the temperature of the sodium-containing fortified salt is 500 ° C. or lower because excessive stress relaxation of the surface layer can be suppressed. More preferably, it is 480 ° C. or lower.
  • the time for immersing the glass plate in the sodium-containing reinforcing salt is 1 hour or more because the surface compressive stress increases.
  • the immersion time is more preferably 2 hours or more, still more preferably 3 hours or more. If the immersion time is too long, not only the productivity is lowered, but also the compressive stress may be lowered due to the relaxation phenomenon. In order to increase the compressive stress, it is preferably 8 hours or less, more preferably 6 hours or less, and further preferably 4 hours or less.
  • this strengthening treatment method it is then preferable to immerse the glass plate in a lithium-containing strengthening salt at 350 ° C. to 500 ° C.
  • the temperature of the lithium-containing fortified salt is 350 ° C. or higher, the treatment time can be shortened, which is preferable. It is more preferably 360 ° C. or higher, and even more preferably 380 ° C. or higher.
  • the temperature of the lithium-containing fortified salt is 500 ° C. or lower, relaxation of compressive stress due to heat can be suppressed, which is preferable. It is more preferably 450 ° C. or lower, and even more preferably 425 ° C. or lower.
  • the time for immersing the glass plate in the lithium-containing reinforcing salt is 10 minutes or more because the stress in the region of 10 to 50 ⁇ m from the surface layer can be sufficiently reduced and high-strength glass can be produced.
  • the immersion time is more preferably 20 minutes or more, still more preferably 30 minutes or more. If the immersion time is too long, the important stress of 50 ⁇ m or more is reduced from the surface layer, and sufficient drop strength may not be obtained.
  • the immersion time is preferably 120 minutes or less, more preferably 90 minutes or less, still more preferably 60 minutes or less.
  • the present strengthening treatment method may further have a step of immersing the glass plate in the potassium-containing fortified salt, or may have a step of immersing the glass plate in the sodium-containing fortified salt again.
  • a salt containing 50% by mass or more of potassium ions is preferable, and a salt containing 75% by mass or more is more preferable, with the mass of the metal ions contained in the fortifying salt being 100% by mass.
  • the sodium-containing fortified salt it is preferable to use the same sodium-containing fortified salt as described above.
  • a high compressive stress layer can be formed on the surface layer of the glass, so that the "glass fracture mode due to bending" can be suppressed.
  • a potassium-containing nitrate is preferable from the viewpoint of ease of handling such as boiling point and danger.
  • the time for immersing the glass plate in the potassium-containing fortified salt or the sodium-containing fortified salt is preferably 1 minute or longer, more preferably 2 minutes or longer, still more preferably 3 minutes or longer, from the viewpoint of forming a high compressive stress layer. Further, from the viewpoint of preventing the diffusion of stress in the deep layer, the immersion time is preferably 10 minutes or less, more preferably 8 minutes or less, still more preferably 6 minutes or less.
  • the temperature After immersing the glass plate in sodium or lithium-containing fortified salt and, if desired, potassium-containing fortified salt or sodium-containing fortified salt, it is preferable to keep the temperature at 300 ° C. or lower. This is because when the temperature becomes higher than 300 ° C., the compressive stress generated by the ion exchange treatment decreases due to the relaxation phenomenon.
  • the holding temperature after immersing the glass plate in the lithium-containing fortified salt or the potassium-containing fortified salt is more preferably 250 ° C. or lower, still more preferably 200 ° C. or lower.
  • the chemically strengthened glass in the present invention (hereinafter, may be referred to as the present strengthening glass) is preferably lithium aluminosilicate glass. More specifically Containing 50% or more of SiO 2 and 5% or more of Al 2 O 3
  • the total content of Li 2 O, Na 2 O and K 2 O is 5% or more.
  • the content of Li 2 O, Li 2 O, molar ratio of the total content of Na 2 O and K 2 O (Li 2 O / (Li 2 O + Na 2 O + K 2 O)) is 0.5 or more Is preferable.
  • This strengthening glass is displayed in mass% based on oxides. SiO 2 50-70%, Al 2 O 3 5-30%, B 2 O 3 0 ⁇ 10% , P 2 O 3 0 ⁇ 10% , Y 2 O 3 0 ⁇ 10% , Li 2 O 3 to 15%, Na 2 O 0-10%, K 2 O 0-10%, It is more preferable to contain (MgO + CaO + SrO + BaO) 0 to 10% and (ZrO 2 + TiO 2) 0 to 5%.
  • the glass having the above composition tends to form a preferable stress profile by the chemical strengthening treatment.
  • this preferable glass composition will be described.
  • SiO 2 is a component that constitutes a glass network. In addition, it is a component that increases chemical durability and reduces the occurrence of cracks when the glass surface is scratched.
  • the content of SiO 2 is preferably 50% or more, more preferably 55% or more, further preferably 58% or more, still more preferably 60% or more. Further, in order to increase the meltability of the glass, the content of SiO 2 is preferably 80% or less, more preferably 75% or less, still more preferably 70% or less.
  • Al 2 O 3 is an effective component for improving ion exchange during chemical strengthening and increasing the surface compressive stress after strengthening, and is a component that raises the glass transition temperature (Tg) and raises Young's modulus. But also.
  • the content of Al 2 O 3 is preferably 5% or more, more preferably 7% or more, still more preferably 13% or more.
  • the content of Al 2 O 3 is preferably 30% or less, more preferably 25% or less, still more preferably 23% or less, still more preferably 20% or less in order to increase the meltability.
  • Li 2 O is a component that forms surface compressive stress by ion exchange, and is an essential component of lithium aluminosilicate glass. By chemically strengthening the lithium aluminosilicate glass, a chemically strengthened glass having a preferable stress profile can be obtained.
  • the content of Li 2 O is preferably 2% or more, more preferably 3% or more, still more preferably 5% or more in order to increase the compressive stress layer depth DOL. Further, in order to suppress the occurrence of devitrification during the production of glass or the bending process, the Li 2 O content is preferably 15% or less, more preferably 10% or less, still more preferably. It is 8% or less.
  • K 2 O is a component that improves the meltability of glass and is also a component that improves the processability of glass.
  • K 2 O may not be contained, but when it is contained, the content is preferably 0.5% or more, more preferably 1% or more. If the K 2 O content is too high, tensile stress may be generated by the ion exchange treatment and cracks may occur. In order to prevent cracks, it is preferably 10% or less, more preferably 8% or less, still more preferably 6% or less, and particularly preferably 5% or less.
  • Na 2 O is a component that forms a surface compressive stress layer by ion exchange using a molten salt containing potassium, and is a component that improves the meltability of glass.
  • Na 2 O may not be contained, but when it is contained, the content is preferably 0.5% or more, more preferably 1% or more, still more preferably 1.5% or more.
  • the Na 2 O content is preferably 10% or less, more preferably 8% or less, still more preferably 6% or less.
  • Alkali metal oxides such as Li 2 O, Na 2 O and K 2 O (hereinafter sometimes referred to as R 2 O) are components that lower the melting temperature of glass, and are 5% in total. It is preferable to contain the above.
  • the total content of Li 2 O, Na 2 O, and K 2 O (Li 2 O + Na 2 O + K 2 O) is preferably 5% or more, more preferably 7% or more, still more preferably 8% or more.
  • Li 2 O + Na 2 O + K 2 O is preferably 20% or less, more preferably 18% or less in order to maintain the strength of the glass.
  • Li 2 O, Li 2 O, Na total molar ratio of 2 O and K 2 O [Li 2 O] / ([Li 2 O] + [Na 2 O] + [K 2 O]) is 0.
  • a high compressive stress can be applied to the glass at the time of chemical strengthening, which is preferable. More preferably, it is 0.6 or more.
  • MgO, CaO, SrO, and BaO are all components that increase the meltability of glass, but tend to reduce the ion exchange performance.
  • the total content of MgO, CaO, SrO, and BaO is preferably 15% or less, more preferably 10% or less, still more preferably 5% or less.
  • the total content (MgO + CaO + SrO + BaO) when at least one of these is contained is preferably 0.1% or more, more preferably 0.5% or more. ..
  • MgO the total content
  • the content is preferably 0.1% or more, more preferably 0.5% or more.
  • the MgO content is preferably 10% or less, more preferably 8% or less.
  • the content is preferably 0.5% or more, more preferably 1% or more.
  • the CaO content is preferably 5% or less, more preferably 3% or less.
  • the content is preferably 0.5% or more, more preferably 1% or more. In order to improve the ion exchange performance, the SrO content is preferably 5% or less, more preferably 3% or less.
  • the content is preferably 0.5% or more, more preferably 1% or more. In order to improve the ion exchange performance, the content of BaO is preferably 5% or less, more preferably 1% or less, and further preferably substantially not contained.
  • ZnO is a component that improves the meltability of glass and may be contained.
  • the content is preferably 0.2% or more, more preferably 0.5% or more.
  • the ZnO content is preferably 5% or less, more preferably 3% or less.
  • TiO 2 is a component that increases the surface compressive stress due to ion exchange, and may be contained. When TiO 2 is contained, the content is preferably 0.1% or more. The content of TiO 2 is preferably 5% or less, more preferably 1% or less, and even more preferably substantially absent, in order to suppress devitrification during melting.
  • ZrO 2 is a component that increases the surface compressive stress due to ion exchange, and may be contained.
  • the content is preferably 0.5% or more, more preferably 1% or more. Further, in order to suppress devitrification at the time of melting, 5% or less is preferable, and 3% or less is more preferable.
  • TiO 2 and ZrO 2 are preferably 5% or less, more preferably 3% or less. Further, both TiO 2 and ZrO 2 may not be contained, but when they are contained, the total content is preferably 1% or more.
  • Y 2 O 3 is a component that improves the strength of glass and may be contained.
  • the content is preferably 0.2% or more, more preferably 0.5% or more, still more preferably 1% or more, still more preferably 1.5% or more. , Especially preferably 2% or more.
  • the content of Y 2 O 3 is preferably 10% or less, more preferably 8% or less, still more preferably 7% or less. , 6% or less is more preferable, 5% or less is further preferable, 4% or less is particularly preferable, and 3% or less is most preferable.
  • La 2 O 3 and Nb 2 O 5 are components that suppress the crushing of the glass article when chemically strengthened, and may be contained.
  • the content of each is preferably 0.5% or more, more preferably 1% or more, still more preferably 1.5% or more, and particularly preferably 2% or more.
  • the total content of Y 2 O 3 , La 2 O 3 and Nb 2 O 5 is preferably 10% or less, more preferably 9% or less, still more preferably 8% or less. This makes it difficult for the glass to devitrify during melting, and it is possible to prevent the quality of the chemically strengthened glass from deteriorating.
  • the contents of La 2 O 3 and Nb 2 O 5 are preferably 10% or less, more preferably 7% or less, still more preferably 6% or less, still more preferably 5% or less, and particularly preferably 4% or less. , Most preferably 3% or less.
  • Ta 2 O 5 and Gd 2 O 3 may also be contained in a small amount in order to suppress the crushing of the chemically strengthened glass, but since the refractive index and the reflectance are high, each is preferably 1% or less, preferably 0.5%. The following are more preferable, and it is further preferable that they are not substantially contained.
  • B 2 O 3 can be added to improve the meltability during glass production and the like.
  • the content of B 2 O 3 is preferably 0.5% or more, more preferably 1% or more, still more preferably 2% or more.
  • B 2 O 3 is a component that facilitates stress relaxation after chemical strengthening, it is preferably 10% or less, more preferably 8% or less, still more preferably 5 in order to prevent a decrease in surface compressive stress due to stress relaxation. % Or less, most preferably 3% or less.
  • P 2 O 5 may be contained in order to improve the ion exchange performance.
  • the content is preferably 0.5% or more, more preferably 1% or more.
  • the content of P 2 O 5 is preferably 10% or less, more preferably 5% or less, still more preferably 3% or less.
  • a coloring component may be added as long as it does not hinder the achievement of desired chemical strengthening properties.
  • the coloring component include Co 3 O 4 , MnO 2 , Fe 2 O 3 , NiO, CuO, Cr 2 O 3 , V 2 O 5 , Bi 2 O 3 , SeO 2 , CeO 2 , Er 2 O 3 , and so on. Nd 2 O 3 can be mentioned. These may be used alone or in combination.
  • the total content of coloring components is preferably 7% or less. Thereby, the devitrification of the glass can be suppressed.
  • the content of the coloring component is more preferably 5% or less, further preferably 3% or less, and particularly preferably 1% or less. If it is desired to increase the visible light transmittance of the glass, it is preferable that these components are not substantially contained.
  • SO 3 , chloride, fluoride and the like may be appropriately contained as a clarifying agent or the like at the time of glass melting. It is preferable that As 2 O 3 is substantially not contained. When Sb 2 O 3 is contained, it is preferably 0.3% or less, more preferably 0.1% or less, and most preferably substantially not contained.
  • the glass transition temperature (Tg) of the strengthening glass is preferably 480 ° C. or higher in order to suppress stress relaxation during chemical strengthening.
  • Tg is more preferably 500 ° C. or higher, further preferably 520 ° C. or higher, because stress relaxation is suppressed and a large compressive stress can be obtained.
  • Tg is preferably 700 ° C. or lower because the ion diffusion rate becomes high at the time of chemical strengthening.
  • Tg is more preferably 650 ° C. or lower, and even more preferably 600 ° C. or lower, in order to easily obtain a deep DOL.
  • the Young's modulus of this strengthening glass is preferably 70 GPa or more.
  • Young's modulus is more preferably 75 GPa or more, and even more preferably 80 GPa or more.
  • Young's modulus is preferably 110 GPa or less, more preferably 100 GPa or less, and even more preferably 90 GPa or less. Young's modulus can be measured by the ultrasonic method.
  • the Vickers hardness of the reinforcing glass is preferably 575 or more.
  • the Vickers hardness after chemical strengthening is preferably 600 or more, more preferably 625 or more, and even more preferably 650 or more.
  • the Vickers hardness is 850 or less. Glass with too high Vickers hardness tends to be difficult to obtain sufficient ion exchange. Therefore, the Vickers hardness is preferably 800 or less, more preferably 750 or less.
  • the fracture toughness value of the reinforcing glass is preferably 0.7 MPa ⁇ m 1/2 or more.
  • the fracture toughness value is more preferably 0.75 MPa ⁇ m 1/2 or more, still more preferably 0.8 MPa ⁇ m 1/2 or more.
  • the fracture toughness value is usually 1.0 MPa ⁇ m 1/2 or less.
  • the fracture toughness value can be measured by the DCDC method (Acta metall. Mater. Vol. 43, pp. 3453-3458, 1995).
  • the average coefficient of thermal expansion ( ⁇ ) of the strengthening glass from 50 ° C. to 350 ° C. is preferably 100 ⁇ 10-7 / ° C. or less.
  • the average coefficient of thermal expansion ( ⁇ ) is more preferably 95 ⁇ 10 -7 / ° C. or lower, and even more preferably 90 ⁇ 10 -7 / ° C. or lower.
  • the temperature at which the viscosity becomes 10 2 dPa ⁇ s (T 2 ) is preferably 1750 ° C. or less, more preferably 1700 ° C. or less, more preferably 1680 ° C. or less.
  • T 2 is usually 1400 ° C. or higher.
  • the temperature (T 4) at which the viscosity becomes 10 4 dPa ⁇ s is preferably 1350 ° C. or less, more preferably 1300 ° C. or less, more preferably 1250 ° C. or less. T 4 is usually 1000 ° C. or higher.
  • the glass raw materials were prepared so as to have the compositions of glass G1 to glass G4 shown in Table 1 in terms of mass percentage based on oxide, and weighed so as to be 400 g of glass. Then, the mixed raw materials were put into a platinum crucible, put into an electric furnace at 1500 to 1700 ° C., melted for about 3 hours, defoamed, and homogenized. Table 2 shows these glass compositions in molar%.
  • the obtained molten glass was poured into a metal mold, held at a temperature about 50 ° C. higher than the glass transition point for 1 hour, and then cooled to room temperature at a rate of 0.5 ° C./min to obtain a glass block.
  • the obtained glass block was cut and ground, and finally both sides were mirror-polished to obtain a glass plate having a thickness of 600 ⁇ m or 800 ⁇ m.
  • the two-step tempering treatment shown in Table 3 was performed to prepare the chemically strengthened glass of Examples 1 to 9 below.
  • the three-step tempering treatment shown in Table 3 was performed to prepare the chemically strengthened glass of Example 10 below.
  • the holding time was held at the temperature shown in the temperature column 1 for the time shown in the holding time column 1.
  • the first strengthening treatment was performed.
  • the nitrate which is the ratio (mass%) of metal ions in the molten salt shown in the lithium-containing molten salt column the nitrate is held at the temperature shown in the temperature column 2 for the time shown in the holding time column 2 and held for 2
  • the chemically strengthened glasses of Examples 1 to 9 were obtained.
  • Example 10 which is the ratio (mass%) of the metal ions in the molten salt shown in the sodium-containing molten salt column is used, and the holding time is at the temperature shown in the temperature column 3.
  • the chemically tempered glass of Example 10 was obtained by holding for the time shown in column 3 and performing the third tempering treatment.
  • Examples 1 to 5 and Example 10 are Examples, and Examples 6 to 9 are Comparative Examples.
  • CS 0 is a compression stress value in the first surface
  • CS A is a compression stress value in the depth D A from the first surface
  • D A depth D B from the first surface range up compressive stress value is the depth that minimizes
  • CS B is a compression stress value in the depth D B from the first surface
  • D B is the depth from the first surface (0.
  • CS 0 is the measured value by using the optical waveguide surface stress meter
  • CS 80 is the value by birefringence stress meter.
  • CT is a tensile stress value at a depth (0.5 ⁇ t) ⁇ m from the first surface, and is a value measured by a birefringence stress meter.
  • the blanks in Examples 7 and 8 in Table 3 indicate that CS A and CS B match. Further, the blank in Example 9 indicates that the stress cannot be measured and has not been measured.
  • Table 3 shows the results of measuring the number of crushed pieces when a 90-degree indenter was driven into a 30 mm square glass plate to crush the glass plate. If the number of crushed pieces exceeds 10, it is determined that the number of crushed pieces exceeds CT-Limit. Further, the blank of Example 10 in Table 3 indicates that the number of crushed pieces was not measured.
  • Examples 6 and 7 have a high drop height and high strength, but the number of crushed pieces at the time of crushing exceeds 10, which is dangerous when crushed.
  • Example 8 is gone and the depth D A and depth D B from the first surface is coincident, the low drop strength.
  • Example 9 cracks were generated in the glass plate after the second chemical strengthening. In addition, due to this, the drop strength was low, and it was impossible for the glass to scatter during processing when measuring stress.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Surface Treatment Of Glass (AREA)
  • Glass Compositions (AREA)
PCT/JP2021/000250 2020-01-14 2021-01-06 化学強化ガラス物品およびその製造方法 Ceased WO2021145258A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202180008747.XA CN114929641A (zh) 2020-01-14 2021-01-06 化学强化玻璃物品及其制造方法
JP2021571159A JP7420152B2 (ja) 2020-01-14 2021-01-06 化学強化ガラス物品およびその製造方法
US17/805,031 US12195387B2 (en) 2020-01-14 2022-06-02 Chemically strengthened glass article and manufacturing method thereof

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2020-003802 2020-01-14
JP2020003802 2020-01-14
JP2020149919 2020-09-07
JP2020-149919 2020-09-07

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/805,031 Continuation US12195387B2 (en) 2020-01-14 2022-06-02 Chemically strengthened glass article and manufacturing method thereof

Publications (1)

Publication Number Publication Date
WO2021145258A1 true WO2021145258A1 (ja) 2021-07-22

Family

ID=76864616

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/000250 Ceased WO2021145258A1 (ja) 2020-01-14 2021-01-06 化学強化ガラス物品およびその製造方法

Country Status (4)

Country Link
US (1) US12195387B2 (https=)
JP (1) JP7420152B2 (https=)
CN (1) CN114929641A (https=)
WO (1) WO2021145258A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022181812A1 (ja) * 2021-02-26 2022-09-01 Ａｇｃ株式会社 化学強化ガラスの製造方法及び化学強化ガラス

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102816247B1 (ko) * 2019-12-17 2025-06-04 삼성디스플레이 주식회사 유리 제품 및 그 제조 방법
CN116490477B (zh) * 2020-09-25 2026-01-02 康宁股份有限公司 具有改善的掉落性能的玻璃基制品的应力分布曲线
CN120152944A (zh) * 2022-11-01 2025-06-13 康宁股份有限公司 可折叠基板、可折叠设备及制造方法
EP4431475A1 (en) * 2023-03-17 2024-09-18 SCHOTT Technical Glass Solutions GmbH Chemically strengthened glass sheet and method for its production
CN119274434B (zh) * 2023-07-07 2025-10-21 Oppo广东移动通信有限公司 玻璃盖板及其制备方法、柔性显示屏及电子设备
CN116813215A (zh) * 2023-07-26 2023-09-29 四川虹科创新科技有限公司 一种化学强化玻璃及其制备方法
CN118108411A (zh) * 2024-02-08 2024-05-31 河北光兴半导体技术有限公司 强化玻璃及其制备方法与应用
CN118993530B (zh) * 2024-08-14 2025-07-11 上海理工大学 一种高强度稀土铝硅酸盐玻璃及其制备方法
CN118954947A (zh) * 2024-08-22 2024-11-15 彩虹集团（邵阳）特种玻璃有限公司 一种锂铝硅玻璃及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016538224A (ja) * 2013-11-25 2016-12-08 コーニング インコーポレイテッド ガラスにおいてある応力プロファイルを達成するための方法
JP2018140932A (ja) * 2012-02-29 2018-09-13 コーニング インコーポレイテッド 非誤差関数圧縮応力プロファイルによるイオン交換ガラス
WO2019004124A1 (ja) * 2017-06-28 2019-01-03 Ａｇｃ株式会社 化学強化ガラス、その製造方法および化学強化用ガラス
JP2019517985A (ja) * 2016-06-14 2019-06-27 コーニング インコーポレイテッド 落下性能が改善されたガラス
US20190352225A1 (en) * 2017-01-18 2019-11-21 Corning Incorporated Glass-based articles with engineered stress profiles and methods of manufacture
US20190389764A1 (en) * 2017-02-02 2019-12-26 Corning Incorporated Lithium containing glass or glass ceramic article with modified k2o profile near the glass surface
WO2020075708A1 (ja) * 2018-10-09 2020-04-16 日本電気硝子株式会社 強化ガラスおよび強化ガラスの製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120052271A1 (en) 2010-08-26 2012-03-01 Sinue Gomez Two-step method for strengthening glass

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018140932A (ja) * 2012-02-29 2018-09-13 コーニング インコーポレイテッド 非誤差関数圧縮応力プロファイルによるイオン交換ガラス
JP2016538224A (ja) * 2013-11-25 2016-12-08 コーニング インコーポレイテッド ガラスにおいてある応力プロファイルを達成するための方法
JP2019517985A (ja) * 2016-06-14 2019-06-27 コーニング インコーポレイテッド 落下性能が改善されたガラス
US20190352225A1 (en) * 2017-01-18 2019-11-21 Corning Incorporated Glass-based articles with engineered stress profiles and methods of manufacture
US20190389764A1 (en) * 2017-02-02 2019-12-26 Corning Incorporated Lithium containing glass or glass ceramic article with modified k2o profile near the glass surface
WO2019004124A1 (ja) * 2017-06-28 2019-01-03 Ａｇｃ株式会社 化学強化ガラス、その製造方法および化学強化用ガラス
WO2020075708A1 (ja) * 2018-10-09 2020-04-16 日本電気硝子株式会社 強化ガラスおよび強化ガラスの製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022181812A1 (ja) * 2021-02-26 2022-09-01 Ａｇｃ株式会社 化学強化ガラスの製造方法及び化学強化ガラス
JPWO2022181812A1 (https=) * 2021-02-26 2022-09-01

Also Published As

Publication number Publication date
US12195387B2 (en) 2025-01-14
CN114929641A (zh) 2022-08-19
JP7420152B2 (ja) 2024-01-23
US20220289625A1 (en) 2022-09-15
JPWO2021145258A1 (https=) 2021-07-22

Similar Documents

Publication Publication Date Title
JP7420152B2 (ja) 化学強化ガラス物品およびその製造方法
CN110799467B (zh) 化学强化玻璃、其制造方法和化学强化用玻璃
JP7260041B2 (ja) 化学強化ガラス
JP7400738B2 (ja) 化学強化ガラスおよびその製造方法
TWI491571B (zh) 用於顯示器裝置的玻璃板，用於顯示器裝置的平板玻璃及其製造方法
CN115385571A (zh) 化学强化玻璃以及化学强化用玻璃
JP7255594B2 (ja) 化学強化ガラスおよびその製造方法
WO2020121888A1 (ja) 化学強化ガラス板、並びに化学強化ガラスを含むカバーガラス及び電子機器
JP2025159118A (ja) 化学強化ガラス物品およびその製造方法
WO2023243574A1 (ja) 化学強化用ガラス及びガラス
WO2025121292A1 (ja) 化学強化ガラス、カバーガラス、ディスプレイおよび太陽電池モジュール
WO2022118512A1 (ja) 化学強化ガラスおよび電子機器筐体

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21740748

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021571159

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21740748

Country of ref document: EP

Kind code of ref document: A1