LID FOR FUSED QUARTZ CRUCIBLE, FUSED QUARTZ CRUCIBLE AND METHOD FOR HANDLING SAME

摘要

COVER FOR VITREOUS SILICA CRUCIBLE AND VITREOUS SILICA CRUCIBLEBy providing a method capable of avoiding invasion of starting materialpowder for crucible into an inner face of the crucible, it is made possible to reliably avoid the invasion of foreign substances into a vitreous silica crucible until an actual use time of the crucible and to handle the crucible with no contamination. A cover 3 mounted onto an opening portion 2 of a vitreous silicacrucible 1, comprising a flange portion 4 in close contact with an outer peripheral end 2a of the opening portion 2, is mounted onto the crucible 1. Fig. 1