Corning Incorporated
Ion-exchangeable mixed alkali aluminosilicate glasses

Abstract:

A glass composition includes from 55.0 mol % to 75.0 mol % SiO.sub.2; from 8.0 mol % to 20.0 mol % Al.sub.2O.sub.3; from 3.0 mol % to 15.0 mol % Li.sub.2O; from 5.0 mol % to 15.0 mol % Na.sub.2O; and less than or equal to 1.5 mol % K.sub.2O. The glass composition has the following relationships: Al.sub.2O.sub.3+Li.sub.2O is greater than 22.5 mol %, R.sub.2O+RO is greater than or equal to 18.0 mol %, R.sub.2O/Al.sub.2O.sub.3 is greater than or equal to 1.06, SiO.sub.2+Al.sub.2O.sub.3+B.sub.2O.sub.3+P.sub.2O.sub.5 is greater than or equal to 78.0 mol %, and (SiO.sub.2+Al.sub.2O.sub.3+B.sub.2O.sub.3+P.sub.2O.sub.5)/Li.sub.2O is greater than or equal to 8.0. The glass composition may be used in a glass article or a consumer electronic product.