METHOD AND APPARATUS FOR MANUFACTURING VITREOUS SILICA CRUCIBLE
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United States of America Patent
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Issued Date -
Jul 5, 2012
app pub date -
Dec 22, 2011
filing date -
Dec 31, 2010
priority date (Note) -
Abandoned
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Abstract
Accurate temperature measurement during manufacturing a vitreous silica crucible is enabled. The present invention provides an apparatus for manufacturing a vitreous silica crucible including: a mold for forming a silica powder layer by supplying silica powder therein; an arc discharge unit having carbon electrodes and a power supply unit and for heating and fusing the silica powder layer by arc discharge; and a temperature measurement unit for measuring temperature of a fused portion in the mold, wherein the temperature measurement unit is an radiation thermometer for measuring temperature by detecting radiation energy of a wavelength of 4.8 to 5.2 μm.
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