Integral spiral woven crucible prefabricated body and coated crucible prepared from same

Abstract

The invention provides an integral spiral woven crucible prefabricated body which is a net-shaped body formed by spirally weaving one or more carbon fiber ropes, and a crucible which is woven in a net-shaped hollowed-out mode with the upper end open and the lower end closed. The crucible 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 are adopted for weaving, a blank body does not need to be manufactured, the shape plasticity is high, limitation of the blankbody 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 spiral braided crucible prefabricated body made of carbon fiber composite material and a coated crucible made of it. 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 grow...

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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