Crucible for pulling monocrystalline silicon and preparation method therefor
A single-crystal silicon and crucible technology is applied in the field of crucibles for pulling single-crystal silicon and its preparation. long effect
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[0023] Specific implementation
[0024] The crucible is composed of a carbon fiber reinforced silicon carbide (C / SiC) crucible blank and various composite layers on the inner surface.
[0025] The preparation method includes the following steps:
[0026] 1). Preparation of C / SiC crucible blanks;
[0027] (1) The present invention adopts the molding compound hot pressing process (MSC) and in-situ synthesis to prepare C / SiC crucible blanks: 1), chopped carbon fiber + binder + carbon powder + silicon powder + (silicon carbide Powder) + release agent, etc., after mixing, form the molding compound, 2), weigh the mass of the molding compound into the cavity of the hot press, 3), under the pressure of the press, the cavity in the mold The molding compound fills the cavity due to the flow of the molding compound. 4) After hot pressing and thermal curing, it becomes a C / SiC crucible blank; 5) After the blank is heat treated, the resin is decomposed and converted Into solid carbon, silicon po...
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