Method of producing uniform silica glass block

Details Method of producing uniform silica glass block Method of producing uniform silica glass block

1988-12-28

1990-07-03

Lindsay, Robert L.

Glass manufacturing

Processes

With shaping of particulate material and subsequent fusing...

65 1, 65 184, 65900, 264527, C03B 2320

Patent

active

049387880

ABSTRACT:
A method of producing a uniform silica glass block comprising using silica powder as a raw material, and treating it at high temperature and pressure by a hot press and/or a hot isostatic press in vacuum or in an inert gas atmosphere, preferably with a capsule of silica glass or a high-melting point metal. By conducting calcination in fluorine, chlorine or their compound gas and then in oxygen, the OH group content of the silica glass can be reduced dramatically.

REFERENCES:
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patent: 4414014 (1983-11-01), Bruning et al.
patent: 4441904 (1984-04-01), Bhatti
patent: 4478626 (1984-10-01), Moritaki
patent: 4515610 (1985-05-01), Bhatti
Journal of Non-Crystalline Solids, 71, (1985), pp. 287-294, "Hip Glassmaking for High Nitrogen Compositions in the Y-Si-Al-O-N System", Mittl, Tallman, Kelsey and Jolley.
C. R. Acad. SC. Paris, t.285, (10/10/1977), C. pp. 265-268, "Chimie Physique", Michel Decottignies, Jean Phalippou et al.
Journal of Materials Science 13 (1978), pp. 2605-2618, "Synthesis of Glasses by Hot-Pressing of Gels", M. Decottignies, J. Phalippou, J. Zarzycki.

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