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
042395208
ABSTRACT:
The instant invention is concerned with the manufacture of articles exhibiting the physical properties and internal microstructure of glass-ceramic bodies but which can be formed spontaneously from a molten glass. Hence, heat treatment of a precursor glass body is not required to cause the crystallization in situ thereof, such as is demanded in the production of conventional glass-ceramic articles. More specifically, this invention relates to the manufacture of glass-ceramic articles which are capable of being mechanically machined, having compositions within the K.sub.2 O--Li.sub.2 O--MgO--SiO.sub.2 --F field, wherein a fluormica comprises the principal crystal phase, and which can be formed spontaneously from a molten glass batch.
REFERENCES:
patent: 3690855 (1972-09-01), Schultz
patent: 3732087 (1973-05-01), Grossman
patent: 3741861 (1973-06-01), Andrieu
patent: 3801295 (1974-04-01), Beal et al.
patent: 3804608 (1974-04-01), Gaskell et al.
patent: 3846101 (1974-11-01), Gaskell et al.
patent: 3985531 (1976-12-01), Grossman
Corning Glass Works
Fisher Richard V.
Janes Jr. Clinton S.
Patty, Jr. Clarence R.
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