TEMPERED GLASS, TEMPERED GLASS PLATE, AND GLASS FOR TEMPERING

摘要

This tempered glass has a compressive stress layer on the surface, and is characterized by having a glass composition that contains, in mass%, 50-80% of SiO2, 10-30% of Al2O3, 0-6% of B2O3, 0-2% of Li2O and 5-25% of Na2O, said glass composition substantially not containing As2O3, Sb2O3, PbO and F.