Glass manufacturing – Processes – Devitrifying glass or vitrifying crystalline glass
Patent
1975-03-19
1976-10-12
Douglas, Winston A.
Glass manufacturing
Processes
Devitrifying glass or vitrifying crystalline glass
156 397, C03B 3200, C03C 322
Patent
active
039855341
ABSTRACT:
The instant invention involves the production of articles exhibiting an internal microstructure and physical characteristics like those of glass-ceramic bodies but which can be formed spontaneously from a molten glass. Hence, in contrast to the production of conventional glass-ceramic articles, no heat treatment of a parent or precursor glass body is required to cause crystallization in situ to occur. More particularly, the instant invention is concerned with the manufacture of highly crystalline glass-ceramic articles, having compositions within the Li.sub.2 O-Na.sub.2 O-Al.sub.2 O.sub.3 -MgO-SiO.sub.2 -F system, wherein a fluormica constitutes the predominant crystal phase, which can be formed spontaneously from a molten glass batch.
REFERENCES:
patent: 3667973 (1972-06-01), Flannery
patent: 3804608 (1974-04-01), Gaskell et al.
Flannery James E.
Wexell Dale R.
Bell Mark
Corning Glass Works
Douglas Winston A.
Janes Jr. Clinton S.
Patty, Jr. Clarence R.
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