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Preparation process of aluminum-graphite composite material

A composite material and preparation process technology, applied in the fields of carbon compounds, inorganic chemistry, non-metallic elements, etc., can solve the problems of weak mechanical properties of composite materials, unfavorable promotion and application, complex process, etc. The effect of resistance to impulse transient current

Active Publication Date: 2018-07-10
江西宁新新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of aluminum-graphite composite material preparation process, and the technical problem to be solved is: the traditional graphite and aluminum composite material preparation method mostly is to mix graphite particle and aluminum powder evenly and then through compacting and sintering molding , the process is complicated, the cost is high, and the mechanical properties of the prepared composite material are weak, which is not conducive to popularization and application

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  • Preparation process of aluminum-graphite composite material
  • Preparation process of aluminum-graphite composite material
  • Preparation process of aluminum-graphite composite material

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Embodiment 1

[0031] The invention provides a high thermal conductivity aluminum-graphite composite material, the model is CA-10, such as figure 1 As shown, the texture structure observed under the scanning electron micrograph is smooth and tidy, and the texture structure is obviously regular. Scanning with EDS figure 2 In the area in the middle line box, the obtained component analysis is as follows image 3 and shown in Table 1 below.

[0032] Table I:

[0033]

[0034] The preparation process steps of the high thermal conductivity aluminum-graphite composite material of the CA-10 type are:

[0035] In the first step, 75 parts by weight of easily graphitized carbon crushed through a 50-mesh sieve with an ash content of 0.3%, 21 parts of mesophase pitch as a binder and 3 parts of green silicon carbide as a catalyst were kneaded at high speed. Knead in the machine for at least 5 minutes. The mesophase pitch is broken through a 100-mesh sieve, with a softening point of 280 degrees ...

Embodiment 2

[0059] The preparation process steps of a high thermal conductivity aluminum-graphite composite material are:

[0060] In the first step, 70 parts by weight of easily graphitized carbon crushed through a 50-mesh sieve with an ash content of 0.3%, 19 parts of mesophase pitch as a binder, and 2 parts of green silicon carbide as a catalyst were kneaded at high speed. Knead in the machine for at least 5 minutes. The mesophase pitch is crushed through a 100-mesh sieve, with a softening point of 280 degrees Celsius and a volatile content of 21.5%, to achieve a basic uniform dispersion. Then add 0.7 parts of anthracene oil as a diffusing agent and mix for 0.5 hours. Finally, the mixed The mixed powder is obtained by drying the material;

[0061] The second step is to put the mixed powder into the mold and press it into a blank with a size of 300mm*300mm*120mm on a 1000-ton press;

[0062] The third step is to roast the blank at a high temperature of 1100 degrees Celsius;

[0063] T...

Embodiment 3

[0068] The preparation process steps of a high thermal conductivity aluminum-graphite composite material are:

[0069] In the first step, 80 parts by weight of easily graphitized carbon crushed through a 50-mesh sieve with an ash content of 0.3%, 23 parts of mesophase pitch as a binder, and 4 parts of green silicon carbide as a catalyst were kneaded at high speed. Knead in the machine for at least 5 minutes. The mesophase pitch is crushed through a 100-mesh sieve, with a softening point of 280 degrees Celsius and a volatile content of 21.5%, to achieve a basic uniform dispersion. Then add 1.3 parts of anthracene oil as a diffusing agent and mix for 1.0 hours. Finally, mix the The mixed powder is obtained by drying the material;

[0070] The second step is to put the mixed powder into the mold and press it into a blank with a size of 300mm*300mm*120mm on a 1000-ton press;

[0071] The third step is to roast the blank at a high temperature of 1150 degrees Celsius;

[0072] The...

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Abstract

A preparation technology of an aluminum-graphite composite material comprises the following steps: 1, material mixing is performed: graphitizable carbon, an adhesive and a catalyst are taken and uniformly mixed, then a dispersing agent is added, the mixture is uniformly mixed and dried finally, and mixed powder is prepared; 2, the mixed powder is subjected to cold press molding, and a blank is prepared; 3, the blank is roasted; 4, the roasted blank is impregnated, and an impregnated blank is obtained; 5, the impregnated blank is roasted for the second time; graphitization is performed: the blank roasted for the second time is placed into a graphitization furnace for heat treatment, and a graphitized blank is obtained; 7, immersion in aluminum is performed: the outer surface of the graphitized blank is cleaned firstly, then the graphitized blank is immersed in pure molten aluminum at the temperature of 800-900 DEG C and subjected to pressure keeping at 20 MPa for at least 3 h, and the aluminum-graphite composite material is prepared.

Description

technical field [0001] The invention relates to the field of high thermal conductivity graphite composite material, in particular to a preparation process of high thermal conductivity aluminum-graphite composite material. Background technique [0002] At present, my country's high-end electronic industrial devices (such as high-power-density electronic devices) are developing in the direction of miniaturization, compact structure, diversified functions, and high-power density. The heat dissipation problems caused by this have seriously affected the work of high-power electronic devices. Stability and reliability, therefore, higher requirements are put forward for the enhanced export and dissipation of heat generated during its operation. The thermal controls used in these electronic devices generally use metal materials such as aluminum, copper, and silver. However, such materials not only have low thermal conductivity, but also have heavy weight and large thermal expansion c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/205C04B41/69
Inventor 田家利张超邓达琴李海航李江标
Owner 江西宁新新材料股份有限公司
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