Patent ID: 8921245
Filing Date: 2014-12-30
Classification: C03B,C03C

Abstract:
1. A glass substrate comprising, in mass percent based on the oxides: from 68 to 81% of SiO from 0.2 to 18% of Al from 0 to 3% of B from 0.2 to 11% of MgO, from 0 to 3% of CaO, from 0 to 3% of SrO, from 0 to 3% of BaO, from 0 to 1% of ZrO from 1 to 18% of Na from 0 to 15% of K from 0 to 2% of Li wherein Al Na MgO+CaO+SrO+BaO is from 0.2 to 14%, MgO+0.357Al Na a glass transition temperature is 500° C. or higher, and an average thermal expansion coefficient at from 50 to 350° C. is less than 85×10