INDUCTION FURNACE WITH GAS DIFFUSER AND CRUCIBLE AND METHOD THEREFOR
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United States of America Patent
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Issued Date -
Feb 25, 2010
app pub date -
Aug 21, 2009
filing date -
Aug 21, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A furnace, a crucible for such a furnace, and a method for preparing and using the crucible. The crucible is formed of a nonmetallic refractory material to have side walls, a base wall, an opening in the base wall, and an interior cavity. A particulate refractory material is packed beneath the base wall and around the side walls of the crucible, and a gas diffuser is positioned beneath the crucible. A solid sintered porous barrier is formed within the opening in the base wall of the crucible and between the gas diffuser and the interior cavity of the crucible. The porous barrier is sufficiently porous to enable a gas exiting the diffuser to flow therethrough and enter the interior cavity of the crucible.
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