METHOD AND APPARATUS FOR MANUFACTURING VITREOUS SILICA CRUCIBLE

摘要

PURPOSE: A manufacturing method of silica glass crucible and apparatus thereof are provided to accurately measure temperature during manufacturing of the silica glass crucible by detecting radiation energy having wave length of 4.8-5.2 micro meters by using a radiation thermometer. CONSTITUTION: An apparatus for manufacturing silica glass crucible comprises a mold(10), an arc discharge part, and a temperature measuring part. The mold forms a silica powder layer(11). The arc discharge part comprises a plurality of carbon electrodes(13) and a power supply unit. The silica powder layer is heat melted by the arc discharge. The temperature measuring part measures the temperature of a melting part within the mold. The temperature measuring part is a radiation thermometer(Cam) and measures the temperature by detecting the radiation energy having wave length of 4.8-5.2 micro meters. A manufacturing method of silica glass crucible comprises the following steps: forming a silica powder layer by providing silica powder inside a mold; and melting the silica powder layer by arc discharge using a plurality of carbon electrodes.