Alkali aluminosilicate glass used in the pre-stressed substrate glass for storage media comprises oxides of silicon, aluminum, boron, lithium, sodium, potassium, zinc, magnesium, calcium, strontium, barium, titanium and zirconium

摘要

Alkali aluminosilicate glass comprises (in wt.%) 55-69 SiO2, 10-18 Al2O3, 0-8 B2O3, 3-10 Li2O, 5-15 Na2O, 0-5 K2O, 2-10 ZnO, 0-5 MgO + CaO + SrO + BaO, 0-5 TiO2, and 0-5 ZrO2. Preferred Features: The alkali aluminosilicate glass comprises (in wt.%) 60-67 SiO2, 12-15 Al2O3, 0-5 B2O3, 5.5-9 Li2O, 6-10 Na2O, 0-2 K2O, 3-8 ZnO, 0-2 CaO, 0-3 TiO2, and 0-3 ZrO2. Up to 4 wt.% Fe2O3, CoO, CuO, V2O5 or Cr2O3 is added as a coloring agent.