Sodium fluormica glass-ceramics

Details Sodium fluormica glass-ceramics Sodium fluormica glass-ceramics

1985-12-20

1986-11-25

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

C03C 1016

Patent

active

046249338

ABSTRACT:
A family of synthetic mica glass-ceramic compositions is disclosed based on a modified sodium fluoromontmorillonoid stoichiometry. These are spontaneously crystallizable glass-ceramics which are composed of 50-62% SiO.sub.2, 20-28% MgO, 5-15% Na.sub.2 O, and 8-13% F. The method comprises supplying excess fluoride during melting to devise a synthetic mica having sodium fluoromontmorillonoid or a solid solution on the talc axis as the dominant crystal phase.

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patent: 3839055 (1974-10-01), Grossman
patent: 3905824 (1975-09-01), Grossman
patent: 3985531 (1976-10-01), Grossman
patent: 3985534 (1976-10-01), Flannery et al.
patent: 4239519 (1980-12-01), Beall et al.
patent: 4239520 (1980-12-01), Grossman
patent: 4559264 (1985-12-01), Hoda et al.

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