| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a quartz crucible having little deformation under a large quantity of heat fed to the quartz crucible having a large diameter equal to or more than 22 inches and practically having no problems. SOLUTION: This production of a quartz crucible for pulling up a single crystal is to fill powdery silicon dioxide along the inside periphery of a rotating gas permeable mold, heat and fuse the powdery silicon dioxide filled layer from inside, form a base body of a semitransparent outer layer under exhausting by suctioning through the mold wall, form a high temperature gas atmosphere inside of the base body at the same time or after forming the semitransparent outer layer, feed powdery silicon dioxide into the high temperature gas atmosphere, fuse at least a part of it, spread it toward and adhering it to the internal surface of the base body and form a transparent internal layer having a predetermined thickness and essentially containing no bubbles. |
