A kind of carbon graphite material and preparation method thereof

A technology of carbon graphite and artificial graphite powder, which is applied in the field of carbon graphite material with interconnected pore structure and its preparation, can solve the problems of impregnation reinforcement limitation, etc., so as to reduce crack defects, improve structural integrity, and reduce material brittle fracture. Effect

Active Publication Date: 2021-09-10
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current traditional pore-making method can only construct a honeycomb-shaped pore structure, and the pores are separated from each other. Such an unconnected structure leads to certain restrictions on later impregnation reinforcement.

Method used

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  • A kind of carbon graphite material and preparation method thereof
  • A kind of carbon graphite material and preparation method thereof
  • A kind of carbon graphite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A carbon-graphite material of the present invention has a through-hole structure; the carbon-graphite material is mainly made of the following component raw materials in parts by mass: 65 parts of pitch coke, 25 parts of artificial graphite powder, 10 parts of carbon black, a small amount of bonding modified pitch and pore-forming agent pitch-based pre-oxidized wire, wherein the amount of modified pitch accounted for 70wt% of the total mass of pitch coke, artificial graphite powder and carbon black; the added amount of pitch-based pre-oxidized wire accounted for pitch coke, 5wt% of the total mass of artificial graphite powder and carbon black.

[0029] The preparation method of the carbon graphite material of the present embodiment comprises the following steps:

[0030] (1) Put pitch coke, artificial graphite powder, and carbon black into a kneader for dry mixing for 1 hour, then raise the temperature of the kneader to 120°C for hot mixing for 1 hour, and then add molt...

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Abstract

The invention discloses a carbon graphite material, which has a connected hole structure. The preparation method of the carbon graphite material is as follows: put pitch coke, artificial graphite powder, and carbon black into a kneader for dry mixing and then hot mixing, then add molten modified pitch for wet mixing; then wet mix the paste The material is dried, crushed, and screened. The screened powder is evenly mixed with pitch-based pre-oxidized wire, and then shaped and roasted to obtain a carbon graphite material with a connected pore structure. The carbon graphite material of the present invention has a through-hole structure, which can realize the densification of homogeneous materials, realize the smooth introduction of functional materials, improve the comprehensive mechanical properties of the material, reduce the brittle fracture of the material, and realize the structural-functional integration of the structure; the through-hole Structured carbon graphite materials can be used in aerospace, transportation, chemical industry, mechanical energy and other fields.

Description

technical field [0001] The invention belongs to the field of carbon graphite materials, and in particular relates to a carbon graphite material with a connected pore structure and a preparation method thereof. Background technique [0002] Carbon graphite material is a kind of non-metallic composite material composed of carbon element as the main chemical component. Because of its light weight, high strength, corrosion resistance, thermal shock resistance, electrical conductivity and self-lubrication, carbon graphite materials are considered as strategic materials in national security fields such as aerospace and atomic energy. However, due to the inhomogeneity and mismatch between the various components of carbon graphite materials during the preparation process, and a series of reactions such as thermal decomposition and thermal condensation of organic components, random micro-cracks and pores will inevitably be generated inside. The existence of these defects makes carbo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B35/83C04B35/532
CPCC04B35/532C04B35/83C04B38/0022C04B2235/422C04B2235/424C04B2235/425C04B2235/5248C04B2235/96
Inventor 涂川俊陈宜兴张思斯徐宇轩洪莉睿巩佩
Owner HUNAN UNIV
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