Composition for gray silica-sodium calcic glass for producing glazing
AssigneeSaint-Gobain Glass France
InventorLaurent Teyssedre
Life of this patent
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Abstract
The invention relates to a gray soda-lime silicate glass composition which comprises the following coloring agents with contents varying within the following weight limits: Fe2O3 (total iron) 0.01 to 0.14% CoO 40 to 150 ppm NiO 200 to 700 ppm the NiO/CoO weight ratio being between 3.5 and 6 and the glass having an overall light transmission (TLD65) under illuminant D65 of between 20 and 60% measured for a thickness of 6 mm. The invention also relates to a glass sheet, optionally thermally toughened, obtained from the aforementioned composition and glazing comprising at least one of these sheets, especially for buildings.
Claims23
A gray soda-lime silicate glass composition, comprising the following coloring agents with contents varying within the following weight limits:
- Fe2O3 (total iron)
- 0.01 to 0.14%;
- CoO
- 40 to 150 ppm;
- and
- NiO
- 200 to 700 ppm;
- wherein:
- the NiO/CoO weight ratio is between 3.5 and 6;
- and
- the glass has an overall light transmission (TLD65) under illuminant D65 of between 20 and 60% measured at a thickness of 6 mm.
Dependencies are inferred from the claim text.