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US 2020/0002216 A1Published application
High Alumina Low Soda Glass Compositions
AssigneeVitro Flat Glass LLC
InventorsJohn Rich, Alan Miller
Life of this patent
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Abstract
A glass composition includes a base glass portion comprising: 65-75 wt % SiO2; 5-15 wt % CaO; 0-5 wt % MgO; 0-5 wt % K2O; 10-14 wt % Na2O; and 1-5 wt % Al2O3; wherein the glass composition has a ratio of Na2O to Al2O3 is in the range of 9.5-12.5 wt %/wt %.
Claims20
A glass composition comprising a base glass portion comprising:
- 65-75 wt % SiO2;
- 5-15 wt % CaO;
- 0-5 wt % MgO;
- 0-5 wt % K2O;
- 10-14 wt % Na2O;
- and
- 1-5 wt % Al2O3;
- wherein the glass composition has a ratio of Na2O to Al2O3 is in the range of 9.5-12.5 wt %/wt %.
5 more elements
A glass composition comprising a base glass portion comprising:
- SiO2 71.2-71.6 wt. %;
- CaO 8.3-8.6 wt. %;
- MgO 5.0-5.2 wt. %;
- K2O 0.24-0.25 wt. %;
- Na2O 13.4-13.5 wt. %;
- and
- Al2O3 1.1-1.2 wt. %.
4 more elements
A method of producing a glass sheet comprising:
- feeding raw batch materials into a container;
- melting the raw batch materials in the container to form a molten glass composition;
- passing the molten glass composition from the container into a pool of a molten metal such that the molten glass composition floats in the pool of molten metal;
- forming the molten glass composition into the shape of the flat glass sheet on the pool of molten metal;
- and
- cooling the molten glass composition to form the flat glass sheet,
- wherein the flat glass sheet comprises:
- 65-75 wt % SiO2;
- 5-15 wt % CaO;
- 0-5 wt % MgO;
- 0-5 wt % K2O;
- 10-14 wt % Na2O;
- and
- 1-5 wt % Al2O3, and
- wherein the flat glass sheet has a ratio of Na2O to Al2O3 is in the range of 9.5-12.5 wt %/wt %.
12 more elements
Dependencies are inferred from the claim text.