Compositions: ceramic – Ceramic compositions – Devitrified glass-ceramics
Patent
1981-06-05
1982-07-27
Bell, Mark
Compositions: ceramic
Ceramic compositions
Devitrified glass-ceramics
C03C 322
Patent
active
043418724
ABSTRACT:
There are disclosed glass-ceramic materials characterized by a nepheline crystal phase and optionally having a secondary celsian or hexacelsian crystal phase. In addition to the SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O, and TiO.sub.2 as a nucleating agent, the materials contain K.sub.2 O and/or Li.sub.2 O in limited amount, and preferably also contain BaO. These additives provide microwave compatibility, a thermal coefficient of expansion below 95.times.10.sup.-7 /.degree.C., and suitability for application as glazed table or ovenware.
REFERENCES:
patent: 3146114 (1964-08-01), Kivlighn
patent: 3201266 (1965-08-01), MacDowell
patent: 3313609 (1967-04-01), Megles
patent: 3528828 (1970-09-01), Smith
patent: 3573072 (1971-03-01), Duke et al.
patent: 3653865 (1972-04-01), Megles
patent: 3720526 (1973-03-01), Duke et al.
patent: 3849097 (1974-11-01), Giffen et al.
patent: 4022627 (1977-05-01), Tashiro et al.
Bell Mark
Corning Glass Works
Janes Jr. Clinton S.
Peterson Milton M.
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