Production method of insulation materials used for crystal pulling furnace

A technology of thermal insulation material and production method, which is applied in the production field of thermal insulation materials for crystal pulling furnaces, can solve the problems of difficult control of production process and poor quality of finished products, and achieve the effects of shortening production cycle, low production cost, and safe and stable production process.

Inactive Publication Date: 2013-07-10
LIAOYANG JINGU CARBON FIBER SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a production method of thermal insulation materials for crystal pulling furnaces, so as to solve the problems in the prior art that the production process is difficult to control and the quality of finished products is poor.

Method used

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  • Production method of insulation materials used for crystal pulling furnace

Examples

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example 1

[0022] A kind of production method of thermal insulation material for crystal pulling furnace, its production process is as follows:

[0023] (1) Soak the graphitized polyacrylonitrile-based short carbon fiber composite material (0.666tex) at ∮360mm×∮390mm×115mm0 at a temperature of 2400°C for 3 hours with an organic composite resin, and dry it for later use; the organic composite resin is selected from phenolic resin, One of furfural resin, furan resin, epoxy resin, etc., preferably phenolic resin (solvent is methanol);

[0024] After curing at 150°C for 3 hours, apply a layer of sealing agent on the surface of the cured polyacrylonitrile-based short carbon fiber composite material, and dry it in the sun for later use (the sealing agent consists of 10-50wt% phenolic resin, 3-50wt% cyclic Oxygen resin, 1~10wt% furan resin, 1~10wt% furfural resin and the balance of methanol).

[0025] (2) Soak the polyacrylonitrile-based graphite fiber felt (0.666tex) after graphitization at 2...

example 2

[0032] (1) Soak ∮45mm0×∮350mm×500mm graphitized viscose-based short carbon fiber composites (0.244tex) at 2400°C in furfural resin (solvent is ethanol) for 2h, dry for later use; treat at 150°C for 3h Finally, coat a layer of phenolic resin on the surface of the short carbon fiber composite material, and let it dry for later use.

[0033] (2) Soak the viscose-based graphite fiber felt graphitized at 2400°C in furfural resin (solvent is ethanol) for 2 hours, and dry it for later use.

[0034] (3) Coating phenolic resin on the surface of the viscose-based short carbon fiber composite material coated with phenolic resin and the surface of the graphite felt; the two materials coated with the adhesive are wound and bonded together, fixed with a mold, and heated at 150~ Pressure curing at 180°C for 5 hours.

[0035] (4) Send the cured product into a high temperature furnace for graphitization at 2400°C.

[0036] (5) After graphitization, spray graphite powder or phenolic resin on ...

example 3

[0039] The carbon fiber composite material is selected from ∮400mm×∮380mm×730mm polyacrylonitrile-based short carbon fiber composite material (0.666tex) after carbonization and graphitization at 2400°C. .

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Abstract

The invention provides a production method of insulation materials used for a crystal pulling furnace. The method comprises: selecting carbonized or graphitized carbon fiber composite, immersing the carbon fiber composite or coating the surface of the carbon fiber composite for 1-3 times with organic composite resin, drying for later use; curing, coating a hole sealing agent on the surface of the carbon fiber composite, drying for later use; selecting carbonized or graphitized carbon fibrofelt, immersing the carbon fibrofelt or coating surfaces of the carbon fibrofelt with the organic composite resin, drying for later use; respectively coating an adhesive on surfaces of the treated carbon fiber composite and the carbon fibrofelt, winding and fitting the two materials, fixing by using a mold, curing; sending the product into a high temperature furnace for carbonization and graphitization, performing surface treatment, sending into a purifying furnace, purifying in inert gas and chlorine, and taking out to obtain the finish product. The method solves problems of difficultly controlled production technology and poor quality of finished products in prior art.

Description

technical field [0001] The invention relates to the technical field of carbon fiber thermal insulation materials, in particular to a production method of carbon fiber thermal insulation materials used in crystal growth furnaces and crystal pulling devices, ceramic sintering furnaces, vacuum high-temperature heat treatment furnaces, etc., and further relates to a The invention discloses a production method of an insulating material for a crystal pulling furnace. Background technique [0002] Carbon fiber is a fibrous carbon material with a series of excellent properties such as high specific strength, high specific modulus, high temperature resistance, ablation resistance, fatigue resistance, creep resistance, electrical conductivity, thermal conductivity, low density and small thermal expansion coefficient. It is an advanced The most important reinforcement material for structural composite materials is widely used in spacecraft, aerospace vehicles, satellites, military indu...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/622
Inventor 刘东影李波张荣路何立新岳斌
Owner LIAOYANG JINGU CARBON FIBER SCI TECH CO LTD
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