Method for manufacturing high-density rigid carbon-fiber heat-insulation material

A thermal insulation material and thermal insulation technology, which is applied in the manufacturing field of high-density rigid carbon fiber thermal insulation materials, can solve the problems of uneven distribution, uneven strength, poor processing performance, etc., and achieve simple process, low thermal conductivity, and stable sex high effect

Active Publication Date: 2010-01-20
辽宁奥亿达新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires high strength and good toughness of carbon fiber, which limits the use of carbon fiber; the two-step efficiency and productivity of needle punching and injection of binder are very low; the binder is injected, which will cause the internal binder of the carbon felt Uneven distribution, after carbonization, the residual carbon in the binder inside the carbon felt is unevenly distributed, resulting in uneven strength, which limits its use; and the density of carbon fiber insulation materials prepared by this method is relatively small, generally lower than 0.1g / cm 3 , making its processing performance relatively poor
And the whole production process is more complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Isotropic pitch-based carbon fiber P-800 is used, the value represents the fiber length in microns, and P represents the ground product. 50 parts of ground carbon fiber and 50 parts of phenolic resin (adding 40 parts of ethanol to dilute the phenolic resin to reduce its viscosity) are thoroughly mixed by stirring. Put the mixture into the forming mold, apply a certain pressure to form, release the mold, and heat the preform to 200°C at a heating rate of 15°C / h for non-melting treatment. Heating to 1000°C at a heating rate of 100°C / h for carbonization treatment to obtain a rigid insulation material. The density of carbon fiber insulation material is 0.19g / cm 3 .

Embodiment 2

[0053] Isotropic pitch-based carbon fiber P-800 is used, the value represents the fiber length in microns, and P represents the ground product. 50 parts of ground carbon fiber and 50 parts of phenolic resin (adding 40 parts of ethanol to dilute the phenolic resin to reduce its viscosity) are thoroughly mixed by stirring. Put the mixture into the forming mold, apply a certain pressure to form, release the mold, and heat the preform to 200°C at a heating rate of 15°C / h for non-melting treatment. Heating to 1000°C at a heating rate of 100°C / h for carbonization treatment to obtain a rigid insulation material. The density of carbon fiber insulation material is 0.19g / cm 3 . The surface of the carbonized rigid insulation material is polished to make the surface smooth.

[0054] The weight ratio of each component of the high-temperature coating is phenolic resin: ethanol: graphite powder = 100:60:60, and the high-temperature coating can be obtained by mixing the phenolic resin, eth...

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PUM

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Abstract

The invention relates to a method for manufacturing a high-density rigid carbon-fiber heat-insulation material. The method comprises the following steps: fully and evenly mixing ground or cut carbon fibers with a bonding agent and a dispersing agent, wherein the ground or cut carbon fiber accounts for 20 to 80 portions by weight, the bonding agent accounts for 80 to 20 portions by weight, and theweight ratio of the bonding agent to the dispersing agent is 1:0.4-1:1; carrying out pouring and compression molding on the mixture to obtain a prefab product made of rigid heat-insulation material of specified shape; and carrying out infusible treatment and carbonization treatment to manufacture rigid carbon-fiber heat-insulation material. The method has the advantages of simple process, high stability and convenient operation. Due to the characteristics of excellent heat insulation performance, low thermal capacity, low density, high strength, and the like, the high-density rigid carbon-fiber heat-insulation material is particularly suitable to be used as a heat-insulation material for high-temperature furnaces such as vacuum heat treatment furnaces, single crystal pulling furnace, ceramic sintering furnace and the like.

Description

technical field [0001] The invention relates to the technical field of carbon fiber thermal insulation materials, in particular to a method for manufacturing high-density rigid carbon fiber thermal insulation materials used in crystal growth furnaces, crystal pulling devices, ceramic sintering furnaces, and vacuum high-temperature heat treatment furnaces. Background technique [0002] At present, the thermal insulation materials used in domestic vacuum high-temperature furnaces generally use soft carbon felt (needle-punched felt). The thermal insulation materials of this structure have low strength, easy deformation, easy pulverization, poor thermal insulation effect and disassembly, Disadvantages such as time-consuming and labor-intensive installation. Rigid carbon fiber thermal insulation materials will overcome the shortcomings of soft carbon felt, and will be widely used as thermal insulation materials for high temperature furnaces such as crystal furnaces, ceramic sinte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 郑淑云陈惠龙王红伟王兴雯刘成华原天强龙晓飞崔欣张作桢
Owner 辽宁奥亿达新材料股份有限公司
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