Carbon-carbon crucible support and preparation method thereof

A technology of prefabricated body and carbon fiber cloth, which is applied in chemical instruments and methods, self-melting liquid pulling method, crystal growth, etc., can solve the problems of increased amount of dipping, high price of graphite molds, increased production costs, etc., and achieves favorable Industrialized production, high market application prospects, and the effect of increasing production speed

Pending Publication Date: 2022-04-22
浙江德鸿碳纤维复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the mainstream preparation process of carbon-carbon crucible holder includes carbon fiber crucible holder prefabricated body and green body hot-press forming; the preparation method of carbon fiber crucible holder prefabricated body is basically contour acupuncture forming, which belongs to the category of special-shaped parts acupuncture, and the mold and The accuracy requirements of the auxiliary materials are relatively high, and the needling takes a long time (generally, it takes 18-25 hours for the shape of a carbon fiber crucible base body to be shaped by needling), and t

Method used

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  • Carbon-carbon crucible support and preparation method thereof
  • Carbon-carbon crucible support and preparation method thereof
  • Carbon-carbon crucible support and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] When performing high-temperature purification, it has little effect on the density of the crucible holder; high-temperature purification mainly removes some metal and non-metallic impurities in the crucible holder; when the application field of the crucible holder does not require the content of metal impurities in the crucible holder, carbon The preparation method of support comprises:

[0116] S1: The carbon fiber mesh tire and carbon fiber cloth are formed by needle punching on a flat plate to obtain a crucible support prefabricated body;

[0117] S2: cutting the crucible support prefabricated body into a plurality of prefabricated crucible support prefabricated bodies;

[0118] S3: Put the crucible holder prefabricated body in the resin soaking agent and let it stand for 1 hour; wherein, the resin soaking agent includes phenolic resin, organic solvent and curing agent;

[0119] S4: Put the prefabricated body of the crucible holder after standing in the shaping mold...

Embodiment 2

[0124] S1: The carbon fiber mesh tire and carbon fiber cloth are formed by needle punching on a flat plate to obtain a crucible support prefabricated body;

[0125] S2: cutting the crucible support prefabricated body into a plurality of prefabricated crucible support prefabricated bodies;

[0126] S3: Put the crucible holder prefabricated body in the resin soaking agent and let it stand for 1 hour; wherein, the resin soaking agent includes phenolic resin, organic solvent and curing agent;

[0127] S4: Put the prefabricated body of the crucible holder after standing in the shaping mold, and carry out hot pressing treatment on the whole shaping device with the prefabricated body of the crucible holder at 120°C. The hot pressing time is 9 hours, and a low Density crucible holder;

[0128] S5: Perform demoulding treatment on the low-density crucible holder, use resin carbon target material to perform vapor deposition on the demolded low-density crucible holder, impregnate the cru...

Embodiment 3

[0132] S1: The carbon fiber mesh tire and carbon fiber cloth are formed by needle punching on a flat plate to obtain a crucible support prefabricated body;

[0133] S2: cutting the crucible support prefabricated body into a plurality of prefabricated crucible support prefabricated bodies;

[0134] S3: Put the crucible support prefabricated body in the resin soaking agent, and let it stand for 1.5 hours; wherein, the resin soaking agent includes phenolic resin, organic solvent and curing agent;

[0135] S4: Put the prefabricated body of the crucible holder after standing still in the shaping mold, and perform hot pressing treatment on the whole shaping device with the prefabricated body of the crucible holder at 130°C. The hot pressing time is 6 hours, and a low Density crucible holder;

[0136] S5: Perform demoulding treatment on the low-density crucible holder, use resin carbon target material to perform vapor deposition on the demolded low-density crucible holder, impregnat...

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Abstract

The invention relates to the technical field of crucible supports, in particular to a carbon-carbon crucible support and a preparation method thereof.The method comprises the steps that a carbon fiber net tire and carbon fiber cloth are subjected to flat needling forming, and a crucible support prefabricated body is obtained; cutting the crucible support prefabricated body into a plurality of crucible support prefabricated body blanks with preset shapes; placing the crucible support preform blank in a resin soaking agent for standing; the crucible support prefabricated blank obtained after standing is placed in a shaping mold, a shaping device is integrally subjected to hot pressing treatment, and the low-density crucible support is obtained; performing demolding treatment on the low-density crucible support, performing vapor deposition on the demolded low-density crucible support by using a resin carbon target material, and performing impregnation and carbonization treatment on the crucible support obtained after vapor deposition until the density of the crucible support reaches a preset density; performing high-temperature purification on the obtained crucible support to obtain a carbon-carbon crucible support; the whole shaping mold can be placed in the drying oven for curing and shaping, operation is easy and convenient, and a good hot pressing effect can be achieved without a complex hot pressing process.

Description

technical field [0001] The application relates to the technical field of crucible supports, in particular to a carbon-carbon crucible support and a preparation method thereof. Background technique [0002] With the rapid development of the photovoltaic industry, Czochralski silicon single crystal has achieved industrial development. Domestic silicon single crystal pulling furnaces generally use graphite thermal field and carbon-carbon composite material thermal field. [0003] In the process of preparing single crystal silicon, products such as crucible supports are needed, and the crucible supports, as the stress-bearing parts of the crucible, must have the characteristics of high density, high strength, and strong corrosion resistance. And as the main loss material in the thermal field of monocrystalline silicon preparation, the length of service life directly affects the operating cost of a single furnace and the safety hazard of equipment. Due to the high brittleness of...

Claims

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Application Information

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IPC IPC(8): B29C70/46B29C70/54C04B35/83C30B15/10C30B29/06
CPCB29C70/46B29C70/54C04B35/83C30B15/10C30B29/06C04B2235/5256C04B2235/77C04B2235/96
Inventor 刘时伟胡士伟
Owner 浙江德鸿碳纤维复合材料有限公司
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