Alkali-free glass and glass plate for a display

Details Alkali-free glass and glass plate for a display Alkali-free glass and glass plate for a display

2005-04-19

2005-04-19

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S067000, C501S070000

Reexamination Certificate

active

06881692

ABSTRACT:
An alkali-free glass consists essentially of, in mass percent, 58-70% SiO2, 10-19% Al2O3, 6.5-15% B2O3, 0-2% MgO, 3-12% CaO, 0.1-5% BaO, 0-4% SrO, 0.1-6% BaO+SrO, 0-5% ZnO, 5-15% MgO+CaO+BaO+SrO+ZnO, 0-5% ZrO2, 0-5% TiO2, and 0-5% P2O5. The alkali-free glass contains substantially no alkali metal oxide and has a density of 2.45g/cm3or less, an average coefficient of thermal expansion of 25×10−7/° C.-36×10−7/° C. within a temperature range between 30 and 380° C., and a strain point not lower than 640° C.

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