| 摘要 |
<p>This invention provides a method for protecting a carbonaceous crucible, which is easy to handle, can significantly reduce a working time, and can realize the covering of a sheet on the internal surface of a crucible without any space and breaking, and a single crystal pulling apparatus. The method for protecting a carbonaceous crucible comprises interposing a protective sheet formed of an expanded graphite material between a quartz crucible and a carbonaceous crucible in which the quartz crucible is placed. In the protective sheet, two or more protective sheet pieces, which are combined integrally in laying between the crucibles, are layed on the inner surface of the carbonaceous crucible.</p> |
