A 3D weaving process of carbon fiber crucible for photovoltaic monocrystalline silicon ingot furnace

A technology of carbon-carbon fiber and carbon fiber, which is applied in the production of crucibles for photovoltaic monocrystalline silicon ingot furnaces, can solve problems such as time-consuming and labor-intensive, high material costs, and crucible cracks

Active Publication Date: 2021-05-11
青岛美卡新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A 3D weaving process of carbon fiber crucible for photovoltaic single crystal silicon ingot furnace, the specific steps are as follows:

[0028] (1) 3D weaving of carbon-carbon crucible prefabricated body: 12 parts of 15-28mm carbon fiber, 35 parts of 36-45mm carbon fiber: 33 parts of 60-80mm carbon fiber, 20 parts of 105-125mm carbon fiber, use a three-dimensional weaving machine for carbon fiber with a good ratio Prepare it according to the predetermined shape of the curved surface crucible;

[0029] (2) Put the carbon-carbon crucible prefabricated body obtained through 3D weaving in a chemical vapor deposition furnace, and use propylene as the carbon source gas for chemical vapor infiltration. The process parameters of chemical vapor infiltration are: the flow rate of carbon source gas is 65L / min, The temperature of chemical vapor infiltration is 1000°C, and the holding time is 25 hours;

[0030] (3) Place the crucible preform after chemical vapor infiltration in an...

Embodiment 2

[0034] A 3D weaving process of carbon fiber crucible for photovoltaic single crystal silicon ingot furnace, the specific steps are as follows:

[0035] (1) 3D preparation of carbon-carbon crucible prefabricated body: according to the weight ratio, 15 parts of 15-28mm carbon fiber, 28 parts of 36-45mm carbon fiber: 37 parts of 60-80mm carbon fiber, 20 parts of 105-125mm carbon fiber, the ratio will be Good carbon fiber is braided according to the predetermined curved surface crucible shape with a three-dimensional braiding machine;

[0036] (2) Put the carbon-carbon crucible prefabricated body obtained through 3D weaving in a chemical vapor deposition furnace, and use propylene as the carbon source gas for chemical vapor infiltration. The process parameters of chemical vapor infiltration are: the flow rate of carbon source gas is 65L / min, The temperature of chemical vapor infiltration is 1000°C, and the holding time is 25 hours;

[0037](3) Place the crucible preform after che...

Embodiment 3

[0041] A 3D weaving process of carbon fiber crucible for photovoltaic single crystal silicon ingot furnace, the specific steps are as follows:

[0042] (1) 3D preparation of carbon-carbon crucible prefabricated body: according to the weight ratio, 15 parts of 15-28mm carbon fiber, 28 parts of 36-45mm carbon fiber: 35 parts of 60-80mm carbon fiber, 22 parts of 105-125mm carbon fiber, the ratio will be Good carbon fiber is braided according to the predetermined curved surface crucible shape with a three-dimensional braiding machine;

[0043] (2) Put the carbon-carbon crucible prefabricated body obtained through 3D weaving in a chemical vapor deposition furnace, and use propylene as the carbon source gas for chemical vapor infiltration. The process parameters of chemical vapor infiltration are: the flow rate of carbon source gas is 65L / min, The temperature of chemical vapor infiltration is 1000°C, and the holding time is 25 hours;

[0044] (3) Place the crucible preform after ch...

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Abstract

A 3D weaving process of carbon fiber crucible for photovoltaic monocrystalline silicon ingot furnace, using a three-dimensional weaving machine to weave 15‑28mm carbon fiber, 36‑45mm carbon fiber: 60‑80mm carbon fiber, 105‑125mm carbon fiber into a curved surface crucible in 3D, and then After chemical vapor infiltration, resin impregnation, curing, carbonization, pitch impregnation, curing, and carbonization, the obtained carbon fiber crucible has tensile resistance, compression resistance and super interlaminar shear resistance in the thermal field, and can withstand large Stress, no deformation at high temperature, maintain the original shape, long service life, etc., and get rid of the limitation of the mandrel, saving a lot of cost.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83C04B35/622C30B11/00C30B29/06
CPCC04B35/622C04B35/83C04B2235/526C04B2235/614C30B11/002C30B29/06
Inventor 李波
Owner 青岛美卡新型材料有限公司
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