Method for manufacturing vitreous silica crucible

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 are discharge unit having c...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SUZUKI ERIKO, SUDO TOSHIAKI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COLORIMETRY GLASS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING METALLURGY MINERAL OR SLAG WOOL PHYSICS RADIATION PYROMETRY TESTING
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Beschreibung
Zusammenfassung:	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 are 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.