Preparation of pollucite ceramics
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United States of America Patent
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Mar 10, 1992
Grant Date -
N/A
app pub date -
Mar 4, 1991
filing date -
Mar 4, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to a method for synthesizing highly crystalline pollucite articles at temperatures not exceeding 1650.degree. C. The method comprises two general steps: (a) a glass frit is prepared having a composition varying from approximately the stoichiometry of Cs.sub.2 O.2SiO.sub.2 to approximately the stoichiometry of Cs.sub.2 O.4SiO.sub.2 with, optionally, up to 5% Al.sub.2 O.sub.3 ; and (b) that glass frit is reacted at a temperature between about 1000.degree.-1650.degree. C. with an Al.sub.2 O.sub.3 -containing material in sufficient amounts to yield a final product having a stoichiometry approximating that of pollucite.
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