Patent ID: 6376403
Filing Date: 2002-04-23
Classification: C03C,Y10T

Abstract:
A glass composition comprising the following basic components in terms of mol %:40 to 65% SiO2, 5 to 25% Al2O3, 2 to 20% Li2O, 0 to 9% Na2O, 0 to 10% TiO2, 0 to 10% ZrO2, 0 to 25% MgO, 0 to 25% CaO, and 0 to 10% SrO, provided that the content of RO (RO=MgO+CaO+SrO) is from 2 to 40% and the sum of (Li2O)/2 and Na2O is from 1 to 10 mol %, said glass composition further containing from 0.1 to 3.0 mol % SnO2 and from 0.004 to 0.1 mol % sulfur (S) in terms of the amount of SO3.