Inhibiting crystallization of opal glass compositions
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United States of America Patent
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Apr 6, 1982
Grant Date -
N/A
app pub date -
Apr 16, 1981
filing date -
Apr 16, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The instant invention is directed to the production of spontaneous opal glass compositions which limit the generation of CaF.sub.2 and crystals having a xonotlite structure therein when heat treated at temperatures higher than the annealing point, but lower than the softening point of the glass. The glasses consist essentially, as analyzed in weight percent on the oxide basis, of about:
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