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A kind of silicon carbide composite powder and its preparation method and use

A technology of carbon silicon carbide and composite powder, which is applied in the field of carbon silicon carbide composite powder and its preparation, can solve the problems of difficulty in forming carbon silicon carbide composite powder, low yield of carbon silicon carbide target material, and poor performance such as density, etc., to achieve Excellent formability, good fluidity, and the effect of weakening lubricity

Active Publication Date: 2022-07-29
KONFOONG MATERIALS INTERNATIONAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the preparation method of the silicon carbide target requires a smaller particle size of the carbon silicon carbide composite powder, the particle size of the carbon powder and silicon carbide powder used as powder raw materials is smaller. However, the carbon powder has a very The high lubricity makes it difficult to shape the silicon carbide composite powder, and it is easy to have the problem of powder extraction during the hot pressing sintering process, which leads to a low yield of the silicon carbide target material, poor density and other properties, and cannot meet the requirements of thermal sensitivity. Requirements for target material quality in printing and other industries

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  • A kind of silicon carbide composite powder and its preparation method and use

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Embodiment 1

[0065] This embodiment provides a preparation method of silicon carbide composite powder, and the preparation method includes the following steps:

[0066] (1) Prepare carbon powder and silicon carbide powder according to the target mass ratio, and mix them uniformly by ball milling to obtain carbon silicon carbide mixed powder;

[0067] Wherein, the particle size of the carbon powder is less than 20 μm, the particle size of the silicon carbide powder is less than 10 μm, the carbon powder is high-purity carbon powder with a purity of 99.995wt%, and the silicon carbide powder is a high-purity carbon powder with a purity of 99.9wt% Silicon powder, the proportion of carbon powder in the target mass ratio is 50wt%, and the rest is silicon carbide powder and inevitable impurities; the material-to-ball ratio of the ball mill is 2:1, and the ball milling time is 30h , the ball-milling medium of the ball-milling is silicon carbide balls, and the ball-milling is carried out under seali...

Embodiment 2

[0073] This embodiment provides a preparation method of silicon carbide composite powder, and the preparation method includes the following steps:

[0074] (1) Prepare carbon powder and silicon carbide powder according to the target mass ratio, and mix them uniformly by ball milling to obtain carbon silicon carbide mixed powder;

[0075]Wherein, the particle size of the carbon powder is less than 20 μm, the particle size of the silicon carbide powder is less than 10 μm, the carbon powder is high-purity carbon powder with a purity of 99.995wt%, and the silicon carbide powder is a high-purity carbon powder with a purity of 99.9wt% Silicon powder, the proportion of carbon powder in the target mass ratio is 40wt%, and the rest is silicon carbide powder and inevitable impurities; the material-to-ball ratio of the ball mill is 1:1, and the ball milling time is 24h , the ball-milling medium of the ball-milling is silicon carbide balls, and the ball-milling is carried out under sealin...

Embodiment 3

[0080] This embodiment provides a preparation method of silicon carbide composite powder, and the preparation method includes the following steps:

[0081] (1) Prepare carbon powder and silicon carbide powder according to the target mass ratio, and mix them uniformly by ball milling to obtain carbon silicon carbide mixed powder;

[0082] Wherein, the particle size of the carbon powder is less than 20 μm, the particle size of the silicon carbide powder is less than 10 μm, the carbon powder is high-purity carbon powder with a purity of 99.995wt%, and the silicon carbide powder is a high-purity carbon powder with a purity of 99.9wt% Silicon powder, the proportion of carbon powder in the target mass ratio is 60wt%, and the rest is silicon carbide powder and inevitable impurities; the material-to-ball ratio of the ball mill is 3:1, and the ball milling time is 36h , the ball-milling medium of the ball-milling is silicon carbide balls, and the ball-milling is carried out under seali...

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Abstract

The present invention relates to a silicon carbide composite powder and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing carbon powder and silicon carbide powder according to a target mass ratio and mixing them uniformly to obtain a silicon carbide mixed powder; (2) Mixing the silicon carbide mixed powder described in step (1) with a binder, a dispersant and water uniformly to obtain a silicon carbide slurry; (3) performing the step (2) with the silicon carbide slurry. Spray granulation to obtain silicon carbide composite powder. The silicon carbide composite powder obtained by the preparation method of the present invention has the advantages of uniform particle size, good fluidity, excellent formability, etc., can be used for the preparation of silicon carbide targets, and effectively ensures the density of the silicon carbide targets. , and the smoothness and uniformity of the target surface.

Description

technical field [0001] The invention relates to the technical field of composite powder preparation, in particular to a silicon carbide composite powder and a preparation method and application thereof. Background technique [0002] The thermal print head includes a base plate made of insulating material, a base layer is made on the base plate, a wire electrode is formed on the base layer, and a heating resistor strip along the main printing direction is formed above the wire electrode and the base layer, and the wire electrode and the heating resistor strip are formed. There is a protective layer on top. The protective layer usually adopts a layer of insulating layer or a layer of insulating layer and a layer of wear-resistant layer. Usually, both the insulating layer and the wear-resistant layer are materials with low thermal conductivity. During the heating process of the heating resistor, the heat generated by the heating resistor is transferred to the printing medium t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/52C04B35/565C04B35/622C04B35/626
CPCC04B35/565C04B35/52C04B35/622C04B35/62695
Inventor 姚力军边逸军潘杰王学泽杨慧珍
Owner KONFOONG MATERIALS INTERNATIONAL CO LTD
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