3D braiding process of carbon-carbon fiber crucible applied to photovoltaic monocrystalline silicon ingot furnaces

Abstract

The invention provides a 3D braiding process of a carbon-carbon fiber crucible applied to photovoltaic monocrystalline silicon ingot furnaces. The 3D braiding process comprises the following steps: carrying out 3D braiding on carbon fibers with size of 15-28mm, carbon fibers with size of 36-45mm, carbon fibers with size of 60-80mm and carbon fibers with size of 105-125mm by using a three-dimensional braiding machine to form a curved-surface crucible, then carrying out chemical vapor infiltration, carrying out resin impregnation, curing, carbonizing, carrying out pitch impregnation, curing andcarbonizing the curved-surface crucible to obtain the carbon-carbon fiber crucible. The obtained carbon-carbon fiber crucible has tension resistance, compression resistance and ultrahigh interlaminarshear resistance in a thermal field, can bear strong stress, is free of deformation under high temperature, can retain the original shape, is long in service life, and can get rid of the restriction of a core mold; a large amount of cost is saved.

Description

technical field [0001] The invention relates to the field of manufacturing crucibles for photovoltaic monocrystalline silicon ingot furnaces, in particular to a 3D weaving process for carbon fiber crucibles for photovoltaic monocrystalline silicon ingot furnaces. Background technique [0002] Solar energy is the most important basic energy among various renewable energy sources. Biomass energy, wind energy, ocean energy, water energy, etc. all come from solar energy. Broadly speaking, solar energy includes the above-mentioned various renewable energy sources. As a kind of renewable energy, solar energy refers to the direct conversion and utilization of solar energy. Converting solar radiant energy into thermal energy through a conversion device belongs to solar thermal utilization technology, and then using thermal energy to generate electricity is called solar thermal power generation; converting solar radiant energy into electrical energy through a photoelectric conversion...

AI Technical Summary

Problems solved by technology

Therefore, the crucible is a key component of the photovoltaic monocrystalline silicon ingot furnace. The most common is the three-petal graphite crucible. Since the crucible itself is spliced ​​from three pieces, there are the following problems: thermal stress, silicon vapor erosion, resulting in crucible Cracking, erosion and loss of strength; sintering or gas phase deposition or liquid phase deposition is required, and the cost of labor is high; the larger the diameter, the greater the wall thickness requirement, and the high material cost, and due to high temperature reaction, graphite itself has poor stability. In addition to the fragility of graphite itself, the service life of the crucible is often short, and it usually needs to be replaced every two or three months, so its high temperature resistance and durability are poor. On the other hand, the production of existing carbon-carbon crucibles relies too much on the core Mandrels of different sizes need to be manufactured to produce crucibles of different specifications, which is time-consuming and laborious