Glass-ceramics

Details Glass-ceramics Glass-ceramics

1998-02-26

1999-10-19

Group, Karl

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 69, 136258, C03C 1002

Patent

active

059688572

ABSTRACT:
A transparent glass-ceramic comprising the following composition, expressed in terms of weight percent on an oxide basis: 45-65 SiO.sub.2, 14-28 Al.sub.2 O.sub.3, 4-13 ZnO, 0-8 MgO, 0-10 TiO.sub.2, 0-6 ZrO.sub.2, 0-8 BaO, 0-15 Cs.sub.2 O, ZnO+MgO in combination being greater than or equal to about 8, and TiO.sub.2 +ZrO.sub.2 in combination being greater than about 4.

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patent: 5330939 (1994-07-01), Marazzi et al.
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patent: 5491116 (1996-02-01), Beall et al.
patent: 5561089 (1996-10-01), Ishizaki et al.
patent: 5658835 (1997-08-01), Onitani et al.
T. Dumas, A. Ramos, M. Gandais, J. Petiau, "Role of Zirconium in Nucleation and Crystallization of a (SiO.sub.2, Al.sub.2 O.sub.3, MgO, ZnO) Glass", 1985, pp. 129-132, Journal of Materials Science Letters.
E. Tkalcec, H. Ivankovie, B. Grzeta, "Crystallization of High-Quartz Solid in Gahnite Glass-Ceramics", 1991, pp. 174-182, Journal of Non-Crystalline Solids.

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