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A kind of copper/microcrystalline graphite composite material and preparation method thereof

A technology of microcrystalline graphite and composite materials, applied in metal material coating process, liquid chemical plating, coating and other directions, can solve the problems of small particle size of microcrystalline graphite, low production efficiency, complicated purification process, etc. The effect of high efficiency, low cost and simple preparation process

Active Publication Date: 2020-10-09
HEILONGJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the particle size of microcrystalline graphite is small, the impurities are seriously coated, and it is difficult to dissociate, resulting in a complicated purification process. The process for preparing copper / graphite composite materials is long and the production efficiency is low.

Method used

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  • A kind of copper/microcrystalline graphite composite material and preparation method thereof
  • A kind of copper/microcrystalline graphite composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The basic operation steps of present embodiment 1 preparation copper / microcrystalline graphite composite material are as follows:

[0038] 1) Material composition of copper / microcrystalline graphite composite

[0039] The main components of the copper / microcrystalline graphite composite material are metallic copper and microcrystalline graphite, wherein the mass ratio of metallic copper to microcrystalline graphite is 3:100. The tap density of copper / microcrystalline graphite composite is 8.1g / cm 3 , the conductivity is 0.772μΩ·m.

[0040] II) Basic steps for preparing copper / microcrystalline graphite composite material (technical process sees attached figure 1 )

[0041] 1000g microcrystalline graphite (100-200 mesh, 80% purity) was mixed with 400g NaOH ball mill, roasted at 800°C for 0.5 hour, the heating rate of roasting was 50°C / min, cooled to room temperature, crushed, and sieved to obtain Microcrystalline graphite with a carbon content of 94%;

[0042] The mi...

Embodiment 2

[0046] The basic operation steps of present embodiment 2 preparation copper / microcrystalline graphite composite material are as follows:

[0047] 1) Material composition of copper / microcrystalline graphite composite

[0048] The main components of the copper / microcrystalline graphite composite material are metallic copper and microcrystalline graphite, wherein the mass ratio of metallic copper to microcrystalline graphite is 0.3:100. The tap density of the copper / microcrystalline graphite composite is 7.5g / cm 3 , the conductivity is 0.765μΩ·m.

[0049] II) Basic steps for preparing copper / microcrystalline graphite composite material (technical process sees attached figure 1 )

[0050] 1000g microcrystalline graphite (100-200 mesh, 85% purity) was mixed with 300g KOH ball mill, roasted at 500°C for 2 hours, the heating rate of roasting was 10°C / min, cooled to room temperature, crushed, and sieved to obtain Microcrystalline graphite with a carbon content of 93%;

[0051] The ...

Embodiment 3

[0055] The basic operation steps of present embodiment 3 preparation copper / microcrystalline graphite composite material are as follows:

[0056] 1) Material composition of copper / microcrystalline graphite composite

[0057] The main components of the copper / microcrystalline graphite composite material are metallic copper and microcrystalline graphite, wherein the mass ratio of metallic copper to microcrystalline graphite is 5:100. The tap density of the copper / microcrystalline graphite composite is 8.6g / cm 3 , the conductivity is 0.783μΩ·m.

[0058] II) Basic steps for preparing copper / microcrystalline graphite composite material (technical process sees attached figure 1 )

[0059] Mix 1000g of microcrystalline graphite (100-200 mesh, 80% purity), 200g of NaOH, and 200g of KOH by ball milling, calcining at 800°C for 0.5 hour at a heating rate of 30°C / min, cooling to room temperature, crushing, and sieving Finally, microcrystalline graphite with a carbon content of 95% is ...

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Abstract

The invention provides a copper / microcrystalline graphite composite and a preparation method thereof. Microcrystalline graphite is purified at first, then the surface of the purified microcrystallinegraphite is wrapped with metal copper or copper alloy in a plating solution, and after plating is completed, the material is washed and subjected to vacuum drying, and the copper / microcrystalline graphite composite is obtained. The interfaces of a graphite matrix and a copper surface layer of the composite are well bonded, and excellent physical properties are achieved. The technique is simple, the process is easy to control, and large-scale production application is easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of modification methods of graphite materials, and in particular relates to a copper / microcrystalline graphite composite material and a preparation method thereof. Background technique [0002] Graphite / copper composite materials are widely used in aviation, electronics, and mechanical fields because of their excellent electrical and thermal conductivity, strong corrosion resistance, ductility, and mechanical properties and the lubricating properties of graphite. However, copper and graphite have significant differences in properties such as melting point and density, and copper and graphite are incompatible with each other, so it is difficult to prepare copper / graphite composite materials with good bonding force. Traditional copper / graphite composite materials are mainly prepared by powder metallurgy and casting, and sometimes semi-solidified state stirring, thermal spraying and vapor deposition are also us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/40B22F1/02
Inventor 刘静宇陈前赫李岳姝孙景丹秦玉珠
Owner HEILONGJIANG UNIV OF TECH
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