Soda-lime silica glass compositions and applications
AssigneeSaint-Gobain Glass France
InventorsNathalie El Khiati, Rene Gy, Eric Le Bourhis
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Abstract
The subject of the invention is a glass composition of the silica-soda-lime type, intended for the manufacture of substrates or sheets, the said glass composition having a φ coefficient of between 0.50 and 0.85 N/(mm2·° C.) and a working point of less than 1200° C.
Claims18
Glass composition of the silica-soda-lime type, intended for the manufacture of substrates or sheets, characterized in that the glass composition has a φ coefficient of between 0.50 and 0.85 N/(mm2·° C.) and a working point of less than 1200° C.
Glass composition of the silica-soda-lime type, intended for the manufacture of substrates or sheets according to one of the preceding claims, characterized in that it satisfies the relationship:
- φ2·c/a<2 MPa2/° C.2.
Glass composition according to one of the preceding claims, characterized in that it satisfies the relationship:
- 0.70 MPa2/° C.2<φ2·c/a.
Glass composition according to one of the preceding claims, characterized in that it contains the constituents below in the following proportions by weight:
- SiO2
- 55-75%
- Al2O3
- 0-7%
- ZrO2
- 0-8%
- Na2O
- 5-10%
- K2O
- 0-8%
- CaO
- 8-12%.
Use of the glass compositions as defined by any one of the preceding claims for the manufacture of monolithic glazing panels resistant to fire according to the G fire resistance classes.
Dependencies are inferred from the claim text.