REINFORCED GLASS, REINFORCED GLASS PLATE, AND GLASS TO BE REINFORCED

摘要

A tempered glass is a tempered glass having a compression stress layer in a surface thereof, comprising as a glass composition, in terms of mol %, 50 to 80% of SiO2, 5 to 30% of Al2O3, 0 to 2% of Li2O, and 5 to 25% of Na2O, and being substantially free of As2O3, Sb2O3, PbO, and F.