Method of producing uniform silica glass block
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United States of America Patent
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-
Jul 3, 1990
Grant Date -
N/A
app pub date -
Dec 28, 1988
filing date -
Dec 28, 1987
priority date (Note) -
Expired
status (Latency Note)
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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.
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