| 摘要 |
PURPOSE: A method for the production of a silica glass crucible is provided which provides to a crucible that does not have the previously described disadvantages, when pulling single crystals, preferably Si single crystals, by means of the CZ method. CONSTITUTION: The method comprises the steps of (a) providing a porous amorphous silica glass green body, which is infiltrated with at least one substance that promotes crystallization of silica, (b) drying the infiltrated silica glass green body, (c) filling the dried infiltrated silica glass green body with a metal or semimetal, and (d) heating the filled, infiltrated silica glass green body over a period of from 1 to 1,000 hours at a temperature of from 900 to 200 deg.C, wherein the silica glass green body is subjected between method step (b) and method step (c) to a heat treatment, in which grain neck formation takes place but an open porosity of the silica glass green body is preserved, wherein the metal or semimetal is selected from the group of polycrystalline silicon, monocrystalline silicon, and mixtures thereof, and wherein the method further comprises the processes of melting the metal or semi-metal to form a melt, and pulling a single crystal from the melt. The method for pulling a single crystal from a melt of a metal or semimetal or mixture thereof in a crucible comprises the process of pulling the single crystal from a melt contained in an unsintered or partially sintered porous amorphous silica glass crucible green body infiltrated with a substance that promotes crystallization of silica. |
