Spontaneously-formed fluormica glass-ceramics

Details Spontaneously-formed fluormica glass-ceramics Spontaneously-formed fluormica glass-ceramics

1975-03-19

1976-10-12

Douglas, Winston A.

Glass manufacturing

Processes

Devitrifying glass or vitrifying crystalline glass

106 396, C03B 3200, C03C 322

Patent

active

039855317

ABSTRACT:
This invention relates to the manufacture of articles exhibiting the physical properties and internal microstructure of glass-ceramics but which can be formed spontaneously from a glass-forming melt, i.e., the heat treatment of a glass body to cause the crystallization in situ thereof conventional in the production of glass-ceramic articles is not required. More particularly, this invention is concerned with the manufacture of glass-ceramic articles having compositions within the Na.sub.2 O-MgO-SiO.sub.2 -F field, wherein a fluormica constitutes the primary crystal phase, which can be formed spontaneously from a molten glass batch.

REFERENCES:
patent: 3804608 (1974-04-01), Gaskell et al.
patent: 3839056 (1974-10-01), Grossman

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