Spontaneously-formed beta-spodumene glass-ceramics

Details Spontaneously-formed beta-spodumene glass-ceramics Spontaneously-formed beta-spodumene glass-ceramics

1975-03-19

1976-10-12

Douglas, Winston A.

Glass manufacturing

Processes

Devitrifying glass or vitrifying crystalline glass

106 397, 106 398, C03B 3200, C03C 322

Patent

active

039855333

ABSTRACT:
The instant invention relates to the production of articles exhibiting the physical properties and internal microstructure of glass-ceramic materials but which can be formed spontaneously from a molten glass, i.e., no heat treatment of a glass body is required to cause the crystallization in situ thereof, as is demanded in the manufacture of conventional glass-ceramic articles. More particularly, this invention is concerned with the production of glass-ceramic articles having compositions within the Li.sub.2 O-Al.sub.2 O .sub.3 -SiO.sub.2 -F field which are nucleated with TiO.sub.2, wherein beta-spodumene solid solution constitutes the predominant crystal phase, and which can be formed spontaneously from a molten glass batch.

REFERENCES:
patent: 3489577 (1970-01-01), Tashiro
patent: 3804608 (1974-04-01), Gaskell et al.
patent: 3856497 (1974-12-01), Hummel

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