Corning Incorporated
NOVEL GLASS AND GLASS-CERAMIC COMPOSITIONS

Abstract:

A composition includes: 30 mol % to 60 mol % SiO.sub.2; 15 mol % to 35 mol % Al.sub.2O.sub.3; 5 mol % to 25 mol % Y.sub.2O.sub.3; 0 mol % to 20 mol % TiO.sub.2; and 0 mol % to 25 mol % R.sub.2O, such that R.sub.2O is the sum of Na.sub.2O, K.sub.2O, Li.sub.2O, Rb.sub.2O, and Cs.sub.2O.