High CTE potassium borosilicate core glasses and glass articles comprising the same
First Claim
1. A glass composition comprising:
- from about 70 mol. % to about 80 mol. % SiO2;
from 0 mol. % to about 8 mol. % Al2O3;
from about 3 mol. % to about 10 mol. % B2O3;
from 0 mol. % to about 2 mol. % Na2O;
from about 10 mol. % to about 15 mol. % K2O; and
from 5 mol. % to 6 mol. % of SrO+BaOthe glass composition comprises a coefficient of thermal expansion greater than or equal to 75×
10−
7/°
C. averaged over a temperature range from 20°
C. to 300°
C.;
the glass composition comprises a liquidus viscosity greater than or equal to 250 kPoise; and
the glass composition is substantially free from MgO and CaO.
1 Assignment
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Accused Products
Abstract
High CTE glass compositions and laminated glass articles formed from the same are described. In one embodiment, a glass composition may include from about 70 mol. % to about 80 mol. % SiO2, from about 0 mol. % to about 8 mol. % Al2O3, and from about 3 mol. % to about 10 mol. % B2O3 as glass formers. The glass composition may further include alkali oxides such as from about 0 mol. % to about 2 mol. % Na2O and from about 10 mol. % to about 15 mol. % K2O. In addition, the glass composition may include from about 5 mol. % to about 6 mol. % of alkaline earth oxide. The alkaline earth oxide may include at least one of CaO, SrO, and BaO. However, the glass composition may be substantially free from MgO. The glass composition may be used in a laminated glass article, such as a laminated glass article formed by a fusion laminate process.
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Citations
25 Claims
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1. A glass composition comprising:
-
from about 70 mol. % to about 80 mol. % SiO2; from 0 mol. % to about 8 mol. % Al2O3; from about 3 mol. % to about 10 mol. % B2O3; from 0 mol. % to about 2 mol. % Na2O; from about 10 mol. % to about 15 mol. % K2O; and from 5 mol. % to 6 mol. % of SrO+BaO the glass composition comprises a coefficient of thermal expansion greater than or equal to 75×
10−
7/°
C. averaged over a temperature range from 20°
C. to 300°
C.;the glass composition comprises a liquidus viscosity greater than or equal to 250 kPoise; and the glass composition is substantially free from MgO and CaO. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification