Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1992-08-06
1993-08-03
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
501 43, 501904, C03C 410, C03C 312
Patent
active
052328791
ABSTRACT:
This invention is directed to glasses exhibiting annealing points above 625.degree. C., strain points above 600.degree. C., linear coefficients of thermal expansion (25.degree.-300.degree. C.) below 90.times.10.sup.-7 /.degree. C., refractive indices below 1.8, and, in thicknesses of 2 mm, infrared transmissions of at least 50% to wavelengths longer than 6 .mu.m, consisting essentially expressed in terms of cation % on the oxide basis, of 5-40% KO.sub.0.5, 4-22% LaO.sub.1.5, 50-76% GaO.sub.1.5, and up to 15% total of at least one additional component in the indicated properties selected from the group consisting of
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Hoaglin Christine L.
Lapp Josef C.
Powley Mark L.
Bell Mark L.
Bonner C. M.
Corning Incorporated
Janes, Jr. C. S.
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