Method and apparatus for manufacturing fused silica crucible, and the fused silica crucible

摘要

A method of manufacturing a fused silica crucible by heating and melting a vitreous silica powder compact (11) shaped into a mold (10) using arc discharge of electrodes (13) arranged around a rotation shaft of the mold, includes the steps of: arranging the electrodes in a ring shape and forming a stable ring-shaped arc that connects the neighboring electrodes, and setting a ratio W/R of a horizontal distance W between the electrode front end and the surface of the vitreous silica powder compact (11) to a vitreous silica powder compact opening radius R, for at least a predetermined time during arc heating, to be in the range of 0.002 to 0.98.