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Alumina/graphite composite ceramic material and preparation method thereof

A technology of alumina ceramics and composite ceramics, which is applied in the field of alumina/graphite composite materials and its preparation, can solve the problems of beryllium oxide toxicity, application limitations, high price of aluminum nitride, etc., and achieve improved thermal conductivity and low production cost , the effect of good market prospects

Inactive Publication Date: 2011-04-27
深圳市乐顿科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These three ceramic materials have high thermal conductivity, but beryllium oxide is highly toxic, aluminum nitride is expensive, and silicon carbide is a good conductor of electricity. Therefore, the application of the three is limited.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0013] A kind of alumina / graphite composite ceramic material and preparation method thereof, is characterized in that, comprises the preparation of graphite powder, the preparation of alumina ceramic material, the preparation of composite powder, the sintering of alumina / graphite composite ceramic material four steps, wherein The specific method of each step is as follows:

[0014] (1), preparation of graphite powder: After mixing 500 mesh graphite and a dispersant whose quality is 1‰ of the graphite mass, add water with a mass 3 times that of the graphite mass, and carry out ball milling; the ball milling time is 10 to 20 hours, and the ball milling After the end, the graphite powder is dried for use;

[0015] (2) Preparation of alumina ceramic material: Weigh and mix alumina powder, talcum powder, wollastonite powder, and barium carbonate powder in a mass ratio of 100:15:20:3 for later use, and also mix and add alumina powder with a mass of 1.5% polyvinyl alcohol by mass; ...

Embodiment 2

[0020] A kind of alumina / graphite composite ceramic material and preparation method thereof, is characterized in that, comprises the preparation of graphite powder, the preparation of alumina ceramic material, the preparation of composite powder, the sintering of alumina / graphite composite ceramic material four steps, wherein The specific method of each step is as follows:

[0021] (1), preparation of graphite powder: After mixing 500 mesh graphite and a dispersant whose mass is 0.1‰ of the mass of graphite, add water with a mass of 1 times the mass of graphite, and perform ball milling; the ball milling time is 10 to 20 hours, and ball milling After the end, the graphite powder is dried for use;

[0022] (2) Preparation of alumina ceramic material: alumina powder, talc powder, wollastonite powder, and barium carbonate powder are weighed and ball-milled according to a mass ratio of 100:10:10:1 and mixed for later use. 0.5% polyvinyl alcohol by powder mass;

[0023] (3) Prepa...

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Abstract

The invention discloses an alumina / graphite composite ceramic material and a preparation method thereof. The preparation method is characterized by comprising four steps of: preparing graphite powder, preparing an alumina ceramic material, preparing composite powder, and sintering the alumina / graphite composite ceramic material. The graphite can be composited into the alumina ceramic material andthe alumina / graphite composite ceramic material with good radiating performance is obtained. The method is simple, the cost is low and the alumina / graphite composite ceramic material is suitable to serve as a material of radiating parts of high-power illuminating light sources.

Description

【Technical field】 [0001] The invention relates to an alumina / graphite composite material and a preparation method thereof, belonging to the field of novel composite materials. 【Background technique】 [0002] So far, the research on compounding carbon elements in structural materials has gone through many years of attempts. It can be regarded as a field that has attracted more attention in the field of materials science. The field of electronic products is also constantly pursuing more materials with new performance and high-quality effects. In order to improve the quality of the product, the heat dissipation problem that has always existed in the new solid light source also requires a new type of material to achieve a good heat dissipation effect. A new type of high thermal conductivity ceramic material has received people's attention. The use of high thermal conductivity ceramics with excellent performance High thermal conductivity ceramics with excellent performance are us...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622
Inventor 余建平赵学国
Owner 深圳市乐顿科技有限公司
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