Substrate provided with a coating based on a glass flux, glass flux material, and method for coating a glass or glass ceramic substrate
AssigneeSchott AG
InventorsIna Mitra, Matthias Bockmeyer, Friedrich Siebers, Ina Joest, Alexander Storch, Matthias Seyfarth, Michael Schwall
Life of this patent
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Abstract
A glass flux material for applying an opaque coating is provided. The glass flux material includes at least one pigment and a glass component with the following composition: SiO2 55-70 mol %, Al2O3 2.5-8 mol %, Bi2O3 0.5-<4 mol %, B2O3 14-27 mol %, with at least 2.5 mol % of at least one oxide of the group Li2O, Na2O, and K2O, wherein the ratio of alkali oxides to aluminum oxide ΣR2O/Al2O3 is less than 6.
Claims26
A coated glass substrate, comprising:
- a glass substrate having a coefficient of linear thermal expansion α at 20° C. to 300° C. of up to 5.5*10−6;
- and
- an opaque coating applied to the glass substrate as a glass flux material, the glass flux material including at least one pigment and a glass component, the glass component comprising:
- SiO2 58-65 mol %,
- Al2O3 2.5-3.6 mol %,
- Bi2O3 0.5-2 mol %, and
- B2O3 18-25 mol %,
- with at least 2.5 mol % of at least one oxide of the group Li2O, Na2O and K2O, and
- a ratio of alkali oxides to aluminum oxide ΣR2O/Al2O3 that is greater than 2.1 and less than 6,
- wherein the glass component has a softening temperature of less than 680° C.
A glass flux material for applying an opaque coating, comprising:
- a paste of at least one pigment and a glass component, the glass component comprising:
- SiO2 58-65 mol %,
- Al2O3 2.5-3.6 mol %,
- Bi2O3 0.5-2 mol %, and
- B2O3 18-25 mol %,
- with at least 2.5 mol % of at least one oxide of the group Li2O, Na2O, and K2O, and
- a ratio of alkali oxides to aluminum oxide ΣR2O/Al2O3 that is greater than 2.1 and less than 6,
- wherein the glass component is ground and has a particle size distribution with a d50 between 1.2 and 2.5 mm, and
- wherein the glass component has a softening temperature of less than 680° C.
A coated glass c, comprising:
- a glass substrate having a coefficient of linear thermal expansion α at 20° C. to 300° C. of up to 5.5*10−6/K;
- and
- a glass flux-based coating having a coefficient of linear thermal expansion α at 20° C. to 300° C. of less than 7*10−6/K, wherein the glass flux-based coating comprises at least one pigment and a glass component, the glass component comprising at least 2.5 mol % of Li2O, 2.5 to 3.6 mol % of Al2O3, 18 to 25 mol % of B2O3, and a ratio of alkali oxides to aluminum oxide ΣR2O/Al2O3 that is greater than 2.1 and less than 6, and wherein the glass flux-based coating exhibits a transmittance of less than 1% in a wavelength range from 380 to 780 nm.
A coated glass substrate, comprising:
- a glass substrate having a coefficient of linear thermal expansion α at 20° C. to 300° C. of up to 5.5*1031 6/K;
- and
- an opaque coating applied to the glass substrate as a glass flux material, the glass flux material including at least one pigment and a glass component, the glass component comprising:
- SiO2 58-65 mol %,
- Al2O3 2.5-3.6 mol %,
- Bi2O3 0.5-2 mol %,
- B2O3 18-25 mol %, and
- at least 2.5 mol % of an alkali oxide selected from the group consisting of Li2O, Na2O, K2O, and any combinations thereof,
- wherein the glass component comprises a ratio of the alkali oxide to aluminum oxide that is greater than 2.1 and less than 6, and
- the glass component comprises a sum of alkali oxides that is at least 8 mol %.
A glass flux material for applying an opaque coating, comprising:
- a paste of at least one pigment and a glass component, the glass component comprising:
- SiO2 58-65 mol %,
- Al2O3 2.5-3.6 mol %,
- Bi2O3 0.5-2 mol %,
- B2O3 18-25 mol %, and
- with at least 2.5 mol % of at least one oxide of the group Li2O, Na2O, and K2O, and
- a ratio of alkali oxides to aluminum oxide ΣR2O/Al2O3 that is greater than 2.1 and less than 6,
- wherein the glass component is ground and has a particle size distribution with a d50 between 1.2 and 2.5 μm, and
- wherein Na2O is present in an amount that is less than 5 mol % and/or in an amount that is less than an amount of Al2O3.
Dependencies are inferred from the claim text.