Corning Incorporated
Laminated glass article with determined modulus contrast and method for forming the same

Abstract:

A laminated glass article includes a glass core layer having a core modulus E.sub.core and a glass cladding layer adjacent to the core layer and having a cladding modulus E.sub.clad. E.sub.clad can be at least 5 GPa less than E.sub.core. A modulus ratio E.sub.core/E.sub.clad can be at least 1.08. The cladding layer can have a compressive stress resulting from a coefficient of thermal expansion (CTE) contrast between the core layer and the cladding layer and/or subjecting the laminated glass article to an ion exchange treatment to form an ion exchanged region at an outer surface of the cladding layer.