Glass compositions
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United States of America Patent
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Sep 8, 1992
Issued Date -
N/A
app pub date -
Aug 13, 1991
filing date -
Apr 10, 1990
priority date (Note) -
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Abstract
The invention provides: (1) a glass composition comprising about 20 to about 85% of SiO.sub.2, about 2 to about 75% of B.sub.2 O.sub.3, 15% or less of Al.sub.2 O.sub.3, about 30% or less of at least one of Li.sub.2 O, Na.sub.2 O, K.sub.2 O, Rb.sub.2 O and Cs.sub.2 O, about 10% or less of at least one of MgO, CaO, ZnO, BaO, SrO and PhO, about 10% or less of at least one of ZrO.sub.2, La.sub.2 O.sub.3, Y.sub.2 O.sub.3, Ta.sub.2 O.sub.3 and Gd.sub.2 O.sub.3, and about 0.05 to about 15% of at least one copper halide; and (2) a glass composition comprising about 8 to about 25% of SiO.sub.2, about 5 to about 35% of P.sub.2 O.sub.5, about 30% or less of B.sub.2 O.sub.3, about 10 to about 35% of Al.sub.2 O.sub.3, about 5 to about 20% of at least one of LI.sub.2 O, Na.sub.2 O, K.sub.2 O, Rb.sub.2 O and Cs.sub.2 O, about 20% or less of at least one of MgO, CaO, ZnO, BaO, SrO and PbO, about 10% or less of at least one of ZrO.sub.2, La.sub.2 O.sub.3, Y.sub.2 O.sub.3, Ta.sub.2 O.sub.3 and Gd.sub.2 O.sub.3, and about 0.05 to about 15% of at least one copper halide.
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