QUARTZ GLASS CRUCIBLE, METHOD FOR PRODUCING SAME, AND METHOD FOR PRODUCING SILICON SINGLE CRYSTAL

摘要

The present invention is a method for producing a quartz glass crucible including the steps of: preparing a substrate for a crucible made of quartz glass and having a crucible shape, producing a synthetic quartz glass material by a direct method or a soot method; processing the synthetic quartz glass material into a crucible shape without pulverizing it; and using heat treatment to bond the inner wall of the substrate for a crucible to the exterior wall of the synthetic quartz glass material processed into a crucible shape, via a silica powder. Provided are a quartz glass crucible capable of avoiding dislocation of a silicon single crystal during production of the silicon single crystal, having high heat resistance, and suppressing decrease of productivity and yield, a method for producing the same, and a method for producing a silicon single crystal using the quartz glass crucible.