a method for regenerating a composite crucible

摘要

A composite crucible for pulling up monocrystalline silicon having a carbonaceous material as an outer layer and a quartz glass as an inner layer which are integrally formed, is regenerated by heating the crucible from the inner surface side; and fusing again the surface of the quartz glass layer or by removing the quartz glass layer of the composite crucible; supplying fresh quartz powders to the inner surface of the remaining carbon crucible to be heated and melted; and vitrifying the quartz powder to thereby integrally form the quartz glass layer and carbon crucible layer.