Nickel aluminosilicate glass-ceramics

Details Nickel aluminosilicate glass-ceramics Nickel aluminosilicate glass-ceramics

1994-02-22

1994-10-04

Group, Karl

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 69, C03C 1002

Patent

active

053526384

ABSTRACT:
This invention is directed to the production of thermally crystallizable glasses which can be crystallized in situ via heat treatment into glass-ceramic articles containing a nickel spinelloid as the predominant crystal phase. The glasses consist essentially, in weight percent, of 40-60% SiO.sub.2, 10-35% Al.sub.2 O.sub.3, 5-35% NiO, 0-20% MgO, and 0-15% total TiO.sub.2 and/or ZrO.sub.2. The preferred glasses contain at least 2% MgO.

REFERENCES:
patent: 2920971 (1960-01-01), Stookey
patent: 3962514 (1976-06-01), Rittler
patent: 4059454 (1977-11-01), Reade
patent: 4198467 (1980-04-01), Reade
Ma, C.-B., K. Sahl, and E. Tillmanus, "Nickel Alumino-silicate, Phase I", Acta. Cryst., B31, 2137-2139 (1975).
Akaogi, M., S.-I Akimoto, K. Horioka, K.-I. Takahashi, and H. Horiuchi, "The System NiAl.sub.2 O.sub.4 -Ni.sub.2 Sio.sub.4 at High Pressures and Temperatures: Spinelloids with Spinel-Related Structures", Journal of Solid State Chemistry, 44, 257-267 (1992) no month.

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