CPC C03C 3/093 (2013.01) [C03C 3/091 (2013.01)] | 10 Claims |
1. A glass composition comprising:
from about 60 mol. % to about 67 mol. % SiO2;
from about 6 mol. % to about 11 mol. % B2O3;
from about 4.5 mol. % to about 11 mol. % Li2O;
Al2O3;
from about 5 mol. % to about 9.4 mol. % Na2O;
K2O;
from about 0 mol. % to about 1.5 mol. % CaO;
from about 0 mol. % to about 6 mol. % MgO;
from about 0 mol. % to about 2 mol. % SrO;
from about 0 mol. % to about 2 mol. % BaO;
from about 0 mol. % to about 4.5 mol. % ZnO;
wherein:
the glass composition comprises greater than about 2 mol. % RO, where RO are divalent metal oxides;
R2O is from about 14 mol. % to about 20 mol. %, where R2O are alkali metal oxides;
the glass composition has an average coefficient of thermal expansion (CTE) of less than about 85×10−7K−1; and
the glass composition has a softening point of less than about 650° C.
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