Corning Incorporated
SOFT, CHEMICALLY-STRENGTHENABLE GLASSES FOR LAMINATES

Abstract:

Disclosed herein are embodiments of a glass article having a glass composition. The glass composition includes SiO.sub.2 in an amount of from 63 mol % to 75 mol %, Al.sub.2O.sub.3 in an amount of from 7 mol % to 13 mol %, R.sub.2O in an amount of from 13 mol % to 24 mol %, P.sub.2O.sub.5 in an amount of from 0.1 mol % to 1.2 mol %, and a water content .beta.-OH of 0.1 abs/mm to 0.5 abs/mm. Further, the glass composition includes at least one of MgO or ZnO. MgO is present in a range from 0 mol % to 7 mol %, and ZnO is present in a range from 0 mol % to 7 mol %. The glass article has an anneal point and a softening point, and the relationship of (anneal point+softening point)/2 is less than 685.degree. C.