Integrally-woven crucible prefabricated body with bottom holes and coating crucible made of integrally-woven crucible prefabricated body

Abstract

The invention provides an integrally-woven crucible prefabricated body with bottom holes, the crucible prefabricated body is an annular hollow net-shaped body formed by weaving one or more carbon fiber ropes, and the diameter of an opening in the upper end of the crucible prefabricated body is larger than that of an opening in the lower end of the crucible prefabricated body. The crucible prefabricated body is formed by weaving one carbon fiber rope or a plurality of carbon fiber ropes, needling of a prefabricated body is not needed, and working hours are saved; straight carbon fiber ropes areadopted for weaving, a blank body does not need to be manufactured, the shape plasticity is high, limitation of the blank body is avoided, flexible design and batch production can be achieved, the delivery period is shortened, and material machining waste is little.

Description

technical field [0001] The invention relates to the application of a carbon fiber composite material in the manufacturing process of monocrystalline silicon or polycrystalline silicon, in particular to an integral braided crucible prefabricated body with a bottom hole and a coated crucible made of the carbon fiber composite material. Background technique [0002] In the manufacture of single crystal silicon, the Czochralski method (CZ method) is generally used at present, which is a method of pulling a single crystal from a melt along a vertical direction. In manufacturing equipment, one component is the graphite crucible, which is used to hold the quartz crucible inside. During use, due to the different expansion coefficients of the quartz crucible and the graphite crucible, and the corrosion reaction between silicon vapor and graphite, there are problems such as cracking of the graphite crucible and loss of strength due to erosion. Moreover, as the diameter of the crystal...

AI Technical Summary

Problems solved by technology

For example, Patent No. 200910118210.X discloses a crucible holding part of a hollow mesh body, which is braided by multiple strands to form a crucible holding part of a mesh body; The processing steps of high-temperature carbonization and vapor deposition are very time-consuming, but the edges of these crucibles are not strengthened, and there is no surface coating treatment, so the edge of the crucible is very easy to corrode during use, resulting in insufficient strength

[0004] Therefore, the crucible of the prior art still has room for improvement

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