Corning Incorporated
Glass ceramic articles having improved properties and methods for making the same

Abstract:

A glass ceramic article including a lithium disilicate crystalline phase, a petalite crystalline phased, and a residual glass phase. The glass ceramic article has a warp (.mu.m)<(3.65.times.10.sup.-9/.mu.m.times.diagonal.sup.2) where diagonal is a diagonal measurement of the glass ceramic article in .mu.m, a stress of less than 30 nm of retardation per mm of glass ceramic article thickness, a haze (%)<0.0994t +0.12 where t is the thickness of the glass ceramic article in mm, and an optical transmission (%)>0.91.times.10.sup.(2-0.03t) of electromagnetic radiation wavelengths from 450 nm to 800 nm, where t is the thickness of the glass ceramic article in mm.