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Copper-plating graphite composite material and preparation method thereof

A technology of copper-plated graphite and composite materials, which is applied in the direction of metal material coating process, liquid chemical plating, coating, etc., can solve the problems that are not suitable for industrial production, achieve easy industrial production, good interface bonding, and overcome resistance high rate effect

Inactive Publication Date: 2008-07-30
株洲市文一电碳有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is the same type of method in the patent document "Special Publication No. 58-9792" published by Japan. In this document, it is described that the method is to reduce copper salt in the form of slurry. Experiments show that this method is not suitable for industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] The copper-plated graphite of this example, base material is -200 order natural flake graphite 1kg, soft water 50kg, 98% copper sulfate 6kg is main salt, 99% zinc powder 1.5kg is reducing agent, copper sulfate is dissolved in soft water earlier. Add -200 mesh natural flake graphite to the water after stirring and dissolving, and then add reducing agent zinc powder after stirring evenly. After 40 minutes, the surface of the natural flake graphite is coated with a copper layer with a weight ratio of 60%. Then dehydrate and wash until the pH value of the lotion is 6-7, then wash it once with 1-5% gelatin aqueous solution; then place the cleaned copper-plated graphite powder in a reduction furnace protected by hydrogen, and the temperature rises to 600 degrees for drying. Out of the oven and packaged into finished products. The prepared copper-coated graphite has a copper weight ratio of 60% of the copper-coated graphite.

example 2

[0019] The copper-plated graphite of this example, base material is -200 order natural flake graphite 1kg, soft water 78kg, 9.3kg of 98% copper sulfate is main salt, 99% zinc powder 2.3kg is reducing agent, copper sulfate is dissolved in soft water earlier. After stirring and dissolving in high-quality water, add -200 mesh natural flake graphite, and then add reducing agent zinc powder after stirring evenly. After 40 minutes, the surface of the natural flake graphite is coated with a copper layer with a weight ratio of 70%. Then dehydrate and wash until the pH value of the lotion is 6-7, then wash it once with 1-5% gelatin aqueous solution; then place the cleaned copper-plated graphite powder in a reduction furnace protected by hydrogen, and the temperature rises to 600 degrees for drying. Out of the oven and packaged into finished products. The prepared copper-coated graphite has a copper weight ratio of 70% of the copper-coated graphite.

example 3

[0021] The copper-plated graphite of this example, the base material is -200 mesh natural flake graphite 1kg, soft water 130kg, 98% copper sulfate 16kg is main salt, 99% zinc powder 4kg is reducing agent, first copper sulfate is dissolved in soft water , after stirring and melting, add -200 mesh natural flake graphite, and then add reducing agent zinc powder after stirring evenly. After 40 minutes, the surface of natural flake graphite is coated with a copper layer with a weight ratio of 80%. Then dehydrate and wash until the pH value of the lotion is 6-7, then wash it once with 1-5% gelatin aqueous solution; then place the cleaned copper-plated graphite powder in a reduction furnace protected by hydrogen, and the temperature rises to 600 degrees for drying. Out of the oven and packaged into finished products. The prepared copper-coated graphite has a copper weight ratio of 80% of the copper-coated graphite.

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Abstract

The invention relates to a copper-plated graphite composite material and the preparing method thereof, in particular to a composite material with copper directly plated on the surface of the natural crystalline flake graphite by adopting a chemical method and the preparing method. The invention has the following steps: firstly, chemical materials of natural crystalline flake graphite powder with a certain granularity, copper sulfate and zinc powder are selected; secondly, the copper ions in copper sulfate are plated on the surface of the natural crystalline flake graphite through a chemical displacement reaction; and thirdly, the natural crystalline flake graphite is dehydrated after being cleaned and then is dried in a reducing furnace under the protection of hydrogen. The copper-plated graphite powder prepared in the invention is a composite material, which has excellent combined interface with copper evenly distributed on the surface of graphite and is provided with the lubricity of graphite as well as the electrical conductivity, the tractility and the high strength of copper. The invention opens up a new way of solving the prior technique of compounding copper and graphite by using asphalt or other adhesives. The invention overcomes the defects of high electric resistance and poor lubricity and is easy for industrialized production..

Description

technical field [0001] The invention relates to a copper-plated graphite composite material and a preparation method thereof, in particular to a composite material which adopts a chemical replacement method to plate copper on the surface of natural flake graphite and a preparation method thereof. Background technique [0002] At present, the composite properties of various materials play an important role in controlling the vibration and noise of structures, thereby also extending the service life of materials under cyclic loading or impact. The existing composite preparation of copper and graphite is basically completed with other adhesives such as asphalt, but the resistivity is high, brittle, and the lubricity and conductivity are poor. Moreover, the distribution between copper and graphite is uneven, and the interface is poorly bonded. Therefore, improving the composite properties of copper and graphite has become the core issue of many studies. Many domestic scientifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/40C04B35/628B22F1/02
Inventor 刘建平肖文辉
Owner 株洲市文一电碳有限公司
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