Glass composition for a substrate

Details Glass composition for a substrate Glass composition for a substrate

1997-03-13

1999-01-12

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 72, C03C 3087

Patent

active

058588973

ABSTRACT:
A glass composition for a substrate consisting essentially of from 59 to 72 wt % of SiO.sub.2, from 1 to 15 wt % of Al.sub.2 O.sub.3, from 0.5 to 9 wt % of MgO, from 0.5 to 11 wt % of CaO, from 0 to 6 wt % of SrO, from 0 to 5 wt % of BaO, from 4 to 19 wt % of MgO+CaO+SrO+BaO, from 0 to 9 wt % of Na.sub.2 O , from 4 to 21 wt % of K.sub.2 O, from 10 to 22 wt % of Na.sub.2 O+K.sub.2 O, and from 0.5 to 10.5 wt % of ZrO.sub.2, wherein the difference between the SiO.sub.2 content and the Al.sub.2 O.sub.3 content is from 50 to 71 wt %, and the specific gravity of the composition is less than 2.6.

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Patent Abstracts of Japan, vol. 015, No. 177, (C-0829), May 7, 1991, JP 03 040933, Feb. 21, 1991.
Patent Abstracts of Japan, vol. 096, No. 002, Feb 29, 1996, JP 07 257937, Oct. 9, 1995.

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