Pollucite crystalline powders with low thermal expansion coefficients and methods for their preparation
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United States of America Patent
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Apr 20, 1993
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N/A
app pub date -
Sep 16, 1991
filing date -
Dec 19, 1990
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Expired
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Abstract
A pollucite powder consisting essentially of a pollucite phase and having an Al.sub.2 O.sub.3 /SiO.sub.2 molar ratio of from 0.21 to 0.25 and a Cs.sub.2 O/SiO.sub.2 molar ratio of from 0.19 to 0.22.
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