Coating crucible with sealing side and manufacture method of coating crucible

Abstract

The invention provides a coating crucible with a sealing side. The coating crucible comprises a crucible upper with a sealing side and a crucible bottom, one carbon fiber rope or more carbon fiber ropes are woven to form the crucible upper and the crucible bottom, needling performs and binding agents are omitted, vapor-phase deposition processing steps of long time are omitted, working time is saved, the coating crucible overcomes the shortcomings of poor crucible elasticity and high brittleness of the performs, heat deformation stress of a quartz crucible can be effectively absorbed, the weight of the crucible upper is greatly reduced, hot melting and impurity content of the crucible are reduced, and material cost and use cost are greatly reduced.

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 a coating crucible with edge sealing made by weaving carbon fiber composite material and a processing and manufacturing method of the crucible. Background technique [0002] In the manufacture of single crystal silicon or polycrystalline silicon, the Czochralski method (CZ method) is commonly 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. More...

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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