| 摘要 |
PROBLEM TO BE SOLVED: To prepare a silica crucible having an inner crucible layer in which the concentration of impurities is minimum and bubbles and bubble growth are reduced at a reasonable cost.SOLUTION: A method for making a silica glass crucible includes forming a first silica grain layer in a mold cavity, forming a second silica grain layer on the first silica grain layer, fusing at least a portion of the second silica grain layer at a first temperature, fusing at least a portion of the first silica grain layer at a second temperature higher than the first temperature, sublimating at least a portion of the first silica grain layer, fusing at least a portion of the second silica grain layer without substantially sucking a gas through the grains, and sucking the gas into pores distributing in the inner wall of the mold cavity through the grains, while fusing the first silica grain layer. |
