| 摘要 |
A mold (1) for the production of a silica crucible by heat-fusing silica or quartz powder (4) attached onto an inner wall of a rotating mold (1), wherein a ring-shaped heat insulating barrier material (7) having a specified inner diameter is disposed on an inner peripheral wall of an upper opening portion of the mold (1) corresponding to an upper region of the silica crucible. |
