Ion exchangeable Li-containing glass compositions for 3-D forming

摘要

According to one embodiment, a glass article may include SiO2, Al2O3, Li2O and Na2O. The glass article may have a softening point less than or equal to about 810° C. The glass article may also have a high temperature CTE less than or equal to about 27×10−6/° C. The glass article may also be ion exchangeable such that the glass has a compressive stress greater than or equal to about 600 MPa and a depth of layer greater than or equal to about 25 μm after ion exchange in a salt bath comprising KNO3 at a temperature in a range from about 390° C. to about 450° C. for less than or equal to approximately 15 hours.

主权项

1. A glass article comprising:
from about 65 mol.% to about 71 mol.% SiO2; from about 7 mol.% to about 12 mol.% Al2O3; from about 1 mol.% to about 9 mol.% Li2O; from about 6 mol.% to about 16 mol.% Na2O; from greater than 0 mol.% to about 5 mol.% K2O; 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. % B2O3, wherein a sum of a concentration of Al2O3 (mol.%), and a concentration of the divalent oxide (mol.%) is greater than about 10 mol %, the glass article having: a softening point less than or equal to about 810° C.; a high temperature coefficient of thermal expansion less than or equal to about 27×10−6/° C.; and 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 KNO3 in a temperature range from about 390° C. to about 450° C. for less than or equal to approximately 15 hours.