Patent ID: 9139469
Filing Date: 2015-09-22
Classification: C03C,Y10T

Abstract:
1. A glass article comprising: from about 65 mol.% to about 71 mol.% SiO from about 7 mol.% to about 12 mol.% Al from about 1 mol.% to about 9 mol.% Li from about 6 mol.% to about 16 mol.% Na from greater than 0 mol.% to about 5 mol.% K from about 0.8 mol.% to about 10 mol.% of a divalent oxide, the divalent oxide comprising both MgO and ZnO; and less than about 0.5 mol. % B a softening point less than or equal to about 810° C.; a high temperature coefficient of thermal expansion less than or equal to about 27×10 a compressive stress greater than or equal to about 600 MPa and a depth of layer greater than or equal to about 35 μm after ion exchange in a salt bath comprising KNO