Patent ID: 6184162
Filing Date: 2001-02-06
Classification: C03C

Abstract:
A high E-modulus glass comprisingSiO.sub.2 17 to 34% by weight, B.sub.2 O.sub.3 1 to 8% by weight, Al.sub.2 O.sub.3 0 to 8% by weight, Li.sub.2 O 0 to <2% by weight, Na.sub.2 O 0.5 to 10% by weight, MgO 10 to 20% by weight, CaO 4 to 12% by weight, TiO.sub.2 14.5 to 25% by weight, ZrO.sub.2 1 to 8% by weight, Nb.sub.2 O.sub.5 0.5 to 4.5% by weight, La.sub.2 O.sub.3 5.5 to 15% by weight, Ce.sub.2 O.sub.3 0 to 8% by weight,and at least one refining agent, as needed, in an amount suitable for refining, with the proviso that .ltoreq.16% by weight of a sum of said La.sub.2 O.sub.3 and said Ce.sub.2 O.sub.3 is present.