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Hard carbon fiber heat insulation board and preparation method thereof

A technology for thermal insulation and hard carbon, applied in the field of carbon fiber thermal insulation material preparation, can solve the problems of difficult raw material recovery, complex process, poor integrity, etc., achieve low price, good overall performance, and improve product quality Effect

Active Publication Date: 2015-09-09
HUNAN BOSHENG CELESTICA NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method takes into account the different structural designs of the high-temperature surface and the low-temperature surface, but the process is complicated. Although there is needle punching, there are still obvious interlayer surfaces due to the difference in the two carbon fiber weaving processes and densities. The integrity is still not good, and the raw materials more difficult to recycle

Method used

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  • Hard carbon fiber heat insulation board and preparation method thereof
  • Hard carbon fiber heat insulation board and preparation method thereof
  • Hard carbon fiber heat insulation board and preparation method thereof

Examples

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preparation example Construction

[0018] The invention provides a method for preparing a rigid carbon fiber thermal insulation board, the preparation method comprising:

[0019] In step S1, the green body is vacuum-filtered and formed.

[0020] Two groups of different carbon fiber slurries are vacuum filtered to form a body; wherein, two groups of different carbon fiber slurries respectively form the bottom and top of the body.

[0021] Specifically, step S1 includes:

[0022] Step S11. Preparation of Class A carbon fiber filaments.

[0023] This step mainly uses carbon fiber filaments with strong anti-radiation at high temperature and anti-ablation to prepare Class A carbon fiber filaments for the hot end surface of the thermal insulation board. The specific preparation process is as follows:

[0024] Grinding the carbon fiber filaments to obtain carbon fiber filaments with a length of 10-30mm accounting for 50%-90%, and carbon fiber filaments with a length of 1-5mm accounting for 10%-50%. Among them, the ...

no. 1 approach

[0046] In step S1, the green body is vacuum-filtered and formed.

[0047] The pitch-based carbon fiber was cut into 20% of 2mm and 80% of 10mm, totaling 2 parts, 1 part of cellulose, 100 parts of deionized water and stirred evenly to prepare A carbon fiber slurry. The polyacrylonitrile-based carbon fiber was cut into 20% of 2mm and 80% of 10mm, totaling 2 parts, 1 part of cellulose, 100 parts of deionized water and stirred evenly to prepare B carbon fiber slurry. Suction the slurry A first, and when the thickness reaches 20mm, turn to the slurry B, and finally pour the diluted phenolic resin after the thickness of the green body reaches 100mm, start the vacuum filtration again, and suck out the excess phenolic resin .

[0048] In step S2, the green body is solidified and formed.

[0049] The green body that has been vacuum filtered is placed in a hot press for compression and solidification, and heated to 200°C at a heating rate of 3°C / min.

[0050] Step S3, green body carb...

no. 2 approach

[0059] The difference from Example 1 is that in this example, in step S1, the proportion of phenolic-based carbon fibers cut into 5mm is 10%, and the proportion of 30mm is 90%, a total of 4 parts, 2 parts of cellulose, and 100 parts of deionized water Stir evenly to prepare A carbon fiber slurry. The polyacrylonitrile-based carbon fiber was cut into 10% of 5mm and 90% of 30mm, 1 part in total, 0.5 part of cellulose, 100 parts of deionized water and stirred evenly to prepare B carbon fiber slurry. Suction the A slurry first, and when the thickness reaches 30mm, turn to the B slurry, and finally pour the diluted phenolic resin after the thickness of the green body reaches 70mm, and start the vacuum filtration again to remove the excess phenolic resin .

[0060] The performance of the prepared rigid carbon fiber thermal insulation board is shown in 2:

[0061] Table 2

[0062]

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Abstract

The invention discloses a hard carbon fiber heat insulation board and a preparation method thereof. The preparation method comprises the following steps: performing green body vacuum filtration forming, and performing vacuum filtration on two groups of different carbon fiber slurry liquid to form a green body, wherein the bottom and the top of the green body are formed by the two groups of different carbon fiber slurry liquid respectively; performing green body curing forming, heating the green body after filtration to 180-300 DEG C at a heating rate of 0.1-5 DEG C / min; performing green body carbonizing treatment; performing green body surface treatment; and performing green body high temperature treatment to prepare the hard carbon fiber heat insulation board. According to the hard carbon fiber heat insulation board and the preparation method thereof disclosed by the invention, the preparation technology is simple, the requirement of furnace heat-field distribution is met, the performance advantages of different types of carbon fibers are combined, and the hard carbon fiber heat insulation board is widely applied to solar crystal growing furnaces, high temperature heat treatment furnaces, ceramic sintering furnaces, special atmosphere high temperature furnaces and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of carbon fiber heat insulation materials, in particular to a hard carbon fiber heat insulation and heat preservation board used in high temperature states such as solar crystal growth furnaces, high temperature heat treatment furnaces, ceramic sintering furnaces, and special atmosphere high temperature furnaces, and its Preparation. Background technique [0002] my country has at least 100,000 high-temperature furnaces such as cemented carbide sintering furnaces, monocrystalline silicon furnaces, polycrystalline ingot furnaces, vacuum smelting furnaces, vacuum heat treatment furnaces, and vapor deposition furnaces. A large part of these high-temperature furnaces are still common Use traditional thermal insulation materials. Because traditional heat insulation materials are difficult to make a thin heat insulation layer, resulting in an increase in the volume of the furnace body, it is difficu...

Claims

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Application Information

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IPC IPC(8): C04B30/02
Inventor 曾自力肖志英王和平
Owner HUNAN BOSHENG CELESTICA NEW MATERIAL TECH CO LTD