Glass manufacturing – Processes – Devitrifying glass or vitrifying crystalline glass
Patent
1975-03-19
1980-12-16
Fisher, Richard V.
Glass manufacturing
Processes
Devitrifying glass or vitrifying crystalline glass
65114, C03B 2700, C03B 3200, C03C 322
Patent
active
042395216
ABSTRACT:
The instant invention to the manufacture of articles exhibiting the highly-crystalline, uniformly fine-grained microstructure of conventional glass-ceramic bodies, but which can be formed spontaneously through cooling a molten glass-forming batch. Hence, the articles of the present invention are not produced by heat treating glass bodies at elevated temperatures to cause crystallization in situ as is required in the manufacture of the classic glass-ceramic articles. Instead, this invention provides a method for spontaneously-forming glass-ceramic articles having compositions within a narrowly-defined area of the Li.sub.2 O-Al.sub.2 O.sub.3 -B.sub.2 O.sub.3 -SiO.sub.2 -TiO.sub.2 field wherein alpha-quartz solid solution constitutes the predominant crystal phase.
REFERENCES:
patent: 3690855 (1972-09-01), Schultz
patent: 3741861 (1973-06-01), Andriev
patent: 3804608 (1974-04-01), Gaskell et al.
patent: 3809543 (1974-05-01), Gaskell et al.
patent: 3846101 (1974-11-01), Gaskell et al.
patent: 3985531 (1976-10-01), Grossman
Corning Glass Works
Fisher Richard V.
Janes Jr. Clinton S.
Patty, Jr. Clarence R.
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