Integrally woven crucible preform and coated crucible prepared from same

Abstract

The invention provides an integrally-woven crucible prefabricated body which is a net-shaped body formed by weaving one or more carbon fiber ropes, and the crucible prefabricated body is formed by densely weaving an opening in the upper end and a compact weaving at the lower end. The crucible is formed by weaving one carbon fiber rope or a plurality of carbon fiber ropes, so that a prefabricated body is unnecessary and working hours are reduced. According to the crucible, straight carbon fiber ropes are adopted for weaving, so that 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 integrally braided crucible preform made by weaving carbon fiber composite materials and a coated crucible made of the same.Background technique[0002]In the production of single crystal silicon, the Czochralski method (CZ method) is currently widely used, which is a method of drawing a single crystal from the melt along the vertical direction. In the manufacturing equipment, there is a graphite crucible, which is used to carry the internal quartz crucible. 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 corrosion strength. Moreover, as the crystal diameter of single crystal silicon grows thick...

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

Images