Corning Incorporated
High strength glass-ceramics having petalite and lithium silicate structures

Abstract:

In embodiments, a glass-ceramic article includes from about 55 wt. % to about 80 wt. % SiO.sub.2; from about 2 wt. % to about 20 wt. % Al.sub.2O.sub.3; from about 5 wt. % to about 20 wt. % Li.sub.2O; a non-zero amount of P.sub.2O.sub.5 less than or equal to 6 wt. %; and from about 3 wt. % to less than 8 wt. % ZrO.sub.2. The glass-ceramic grains having a longest dimension of less than 100 nm.