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A kind of method for preparing copper-graphene composite material

A composite material and graphene technology, applied in the field of preparing copper-graphene composite materials, can solve the problems of poor wettability and low bonding strength, and achieve the effects of high density, simple and easy process, and good electrical conductivity and thermal conductivity.

Inactive Publication Date: 2018-11-02
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems of low bonding strength and poor wettability of copper-graphene composite material interface, and provide a method for preparing copper-graphene composite material with simple preparation process and effective modification of graphene surface

Method used

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  • A kind of method for preparing copper-graphene composite material
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  • A kind of method for preparing copper-graphene composite material

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preparation example Construction

[0030] A kind of preparation method of copper-graphene composite material, comprises the steps:

[0031] 1) mixing graphene dispersion liquid, copper-based material powder, appropriate amount of polyacrylamide gel and water, and ball milling fully to obtain ball milling material;

[0032] 2) Add an appropriate amount of polyacrylamide solution to the ball abrasive to practice mud;

[0033] 3) After the mud refining is completed, the mud is dried and crushed to obtain powder;

[0034] 4) Put the powder into the mold, and cold-press to form the green body;

[0035] 5) Pre-fire the green body at 450-600 °C to make the elements diffuse evenly, then heat up to 800-1000 °C for roasting, and obtain a pre-sintered body after cooling;

[0036] 6) Repress the pre-sintered body, and refire the obtained compact at 800-1000°C to obtain a profile.

[0037] As a further improvement of the above method, in the copper-graphene composite material, the mass percentage of graphene is 1-4%.

...

Embodiment 1

[0050] 1) Take 1 g of the graphene dispersion, add 99 g of copper powder, 3 ml of polyacrylamide gel and an appropriate amount of water into a ball mill and mix for 6 hours to obtain a ball mill;

[0051] 2) Add 20ml of 0.5mol / L polyacrylamide solution to the ball mill, knead the mud to a thick slurry, then dry and pulverize it to obtain a powder;

[0052] 3) Put the powder in the mold, and then at 2T / cm 2 Cold pressing under pressure to obtain green body;

[0053] 4) Pre-fire the green body at 500°C for 30 minutes, then raise the temperature to 830°C for 90 minutes, and cool to obtain a pre-sintered body;

[0054] 5) Put the pre-sintered body at 2T / cm 2 Recompress under pressure to obtain a compact;

[0055] 6) Refire the compact at 830°C for 90 minutes to obtain a profile.

Embodiment 2

[0057] 1) Take 2g of the graphene dispersion, add 98g of tin bronze powder with a tin content of 10wt%, 6ml of polyacrylamide gel and an appropriate amount of water, put it into a ball mill and mix it for 6 hours to obtain a ball mill;

[0058] 2) Add 20ml of 1.5mol / L polyacrylamide solution to the ball mill, knead the mud to a thick slurry, then dry and pulverize it to obtain a powder;

[0059] 3) Put the powder in the mold, and then at 2.5T / cm 2 Cold pressing under pressure to obtain green body;

[0060] 4) Pre-fire the green body at 500°C for 30 minutes, then raise the temperature to 840°C for 90 minutes, and cool to obtain a pre-sintered body;

[0061] 5) Put the pre-sintered body at 2.5T / cm 2 Recompress under pressure to obtain a compact;

[0062] 6) Refire the compact at 840°C for 90 minutes to obtain a profile.

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Abstract

The invention discloses a method for preparing a copper-graphene composite material. Polyacrylamide is added in the mixing process of a copper-based material and graphene, so the copper-based material and graphene mixing uniformity is greatly improved, segregation is difficult, the copper-based material and graphene wet each other, the interface combination force is enhanced, prevention of crack expansion in the impact process is facilitated, and stress concentration is alleviated. The prepared composite material has excellent performances; and the preparation method has the advantages of simplicity and low cost.

Description

technical field [0001] The object of the present invention is to provide a kind of preparation method of copper-graphene composite material Background technique [0002] Powder surface modification uses organic or inorganic chemical additives as modifiers. Through the coverage of modifiers on the surface of particles or particle aggregates, the functional groups of the modifiers are attached to the surface of the particles, thereby changing the wetness of the particle surface. wetness. The solid is subjected to a large amount of mechanical energy during the pulverization process. In addition to being consumed in particle refinement, part of this energy is used to change the lattice and surface structure of the particle, thereby presenting an activation phenomenon of increased activity and enhanced interphase reaction capability. The process of modifying the surface of powder by mechanochemical effect is called mechanochemical modification, and it is generally considered to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C9/00
CPCC22C1/05C22C9/00
Inventor 王斌李婷彭福华
Owner CENT SOUTH UNIV
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