Aluminum-free borosilicate glass and applications thereof

Details Aluminum-free borosilicate glass and applications thereof Aluminum-free borosilicate glass and applications thereof

2006-12-05

2006-12-05

Lorengo, J. A. (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S058000

Reexamination Certificate

active

07144835

ABSTRACT:
The aluminum-free borosilicate glass has a composition in percent by weight based on oxide content of: SiO2, 65–77; B2O3, 7–20; Li2O, 0–2; Na2O, 0–4; K2O, 3–12; MgO, 0–2; CaO, 0–2; with MgO+CaO, 0–3; BaO, 0–3; ZnO, 0–2; ZrO2, 0.8–12; TiO2, 0–10; CeO2, 0–1; and F−, 0–0.6. This glass advantageously has a coefficient of thermal expansion α (20° C.; 300° C.) of between 3.0×10−6/K and 6×10−6/K, good chemical resistance and a working point VAof between 990° C. and 1290° C.

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Machine Translation of JP 2005-075705.

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