Corning Incorporated
CHEMICALLY-STRENGTHENABLE GLASSES FOR LAMINATES

Abstract:

Disclosed herein glass articles having a glass composition. The glass composition includes SiO.sub.2 in an amount in a range from about 63 mol % to about 75 mol %; Al.sub.2O.sub.3 in an amount in a range from about 7 mol % to about 13 mol %; R.sub.2O in an amount from about 13 mol % to about 24 mol %; P.sub.2O.sub.5 in an amount in a range from about 0 mol % to about 2 mol %; MgO is present in a range from about 0 mol % to about 10 mol %; ZnO is present in an amount in a range from about 0 mol % to about 10 mol %; and CaO, SrO, BaO and, F.sup.-; or TiO.sub.2, ZrO.sub.2, and Cl.sup.-; the glass article having an anneal point (.degree. C.) and a softening point (.degree. C.), and a relationship of (anneal point+softening point)/2 in a range from about 625.degree. C. to about 725.degree. C.