REINFORCING METHOD OF SILICA GLASS SUBSTANCE AND REINFORCED SILICA GLASS CRUCIBLE
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United States of America Patent
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app pub date -
Apr 13, 2010
filing date -
Oct 9, 2002
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Abandoned
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Abstract
A process reinforcing a silica glass substance, such as a silica glass crucible, is provided without intermixing an impurity. The process comprises forming a silica glass powder layer on a surface of the silica glass substance, and crystallizing said silica glass powder layer under high temperature. As for a silica glass crucible, the process for reinforcing the silica glass crucible and the reinforced silica glass crucible are provided, wherein the silica glass powder layer on the whole or a part of the surface of the crucible is formed and then, crystallized under a temperature at the melting of a silicon raw material being charged into said quartz glass crucible.
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