Patent ID: 6455451
Filing Date: 2002-09-24
Classification: A61K,C03B,C03C

Abstract:
A glass-ceramic composition consisting essentially of in weight percent:about 64 to about 70% SiO2; about 1.5 to about 6 Al2O3; about 10 to about 15% Li2O; about 2.5 to about 5% K2O; about 2 to about 7% P2O5 up to about 1.5% F; up to about 7% BaO; up to about 1% SrO; up to about 5% Cs2O; up to about 2.7% B2O3; up to about 0.9% CaO; up to about 3% Na2O; up to about 2% TiO2; up to about 3% ZrO2; up to about 1% SnO2; up to about 1% Sb2O3; up to about 3% Y2O3; up to about 1% CeO2; up to about 1% Eu2O3; up to about 1% Tb4O7; up to about 2% Nb2O5; and up to about 2% Ta2O5.