Compositions: ceramic – Ceramic compositions – Devitrified glass-ceramics
Patent
1988-03-03
1988-11-22
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Devitrified glass-ceramics
501 57, 501 59, 501 70, C03C 1016, C03C 3112
Patent
active
047866179
ABSTRACT:
This invention relates to the preparation of glass-ceramic articles in which potassium fluorrichterite and/or a related fluormica constitutes the predominant crystal phase(s). The precursor glasses can be crystallized in situ very rapidly and exhibit very little thermal deformation during the crystallization heat treatment. The base glasses are essentially free of Li.sub.2 O and consist essentially, expressed in terms of weight percent on the oxide basis, of:
REFERENCES:
patent: 4467039 (1984-08-01), Beall et al.
patent: 4608348 (1986-08-01), Beall et al.
Andrieu Andre
Comte Marie J. M.
Ferry Frederic J. M.
Mazeau Jean-Pierre
Bell Mark L.
Corning Glass Works
Janes Jr. Clinton S.
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