Patent ID: 6689704
Filing Date: 2004-02-10
Classification: C03B,C03C

Abstract:
A SiO2â€”Al2 O3â€”Li2O component-based glass material consisting essenially of, as basic components, SiO2: 60-63 wt %; Al2O3: 23-25 wt %; and Li2O: 4-5 wt % and, as modifying components, ZrO2: 1.5-2.5 wt %; TiO2: 0.5-2.5 wt %; MgO: 0.5-1.5 wt %; ZnO: 0.5-1.2 wt %; Na2O: 0.5-2.0 wt % P2O5: 0 wt %; and K2O: 0.5-2.0 wt %, and further includes BaO: 0.5-1.0 wt %.