Aluminum silicon carbide material and preparation method thereof

A technology of aluminum silicon carbide and silicon carbide, which is applied in the field of aluminum silicon carbide materials and its preparation, can solve the problems of low thermal conductivity of aluminum silicon carbide materials, low strength of silicon carbide prefabricated parts, and difficulty in meeting electronic packaging, so as to improve the strength , Reduce the formation of silica, improve the effect of thermal conductivity

Inactive Publication Date: 2020-10-30
BYD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silicon carbide preforms prepared in this way have the defects of low strength and low thermal conductivity of aluminum silicon carbide mater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] The present invention also provides a preparation method of aluminum silicon carbide material, the preparation method comprises the following steps:

[0022] S1, the silicon carbide particles of 100 parts by weight, the metal nitrates of 1-10 parts by weight and the binder of 1-10 parts by weight are mixed to obtain a mixture;

[0023] S2, carrying out drying and molding treatment to the mixture to obtain a green body;

[0024] S3, sintering the green body to obtain a silicon carbide preform;

[0025] S4, performing aluminizing treatment on the silicon carbide preform to obtain an aluminum silicon carbide material.

[0026] In the present invention, preferably, the silicon carbide particles in the step S1 include coarse silicon carbide particles and fine silicon carbide particles; the D50 of the coarse silicon carbide particles is 90-150 μm, and the D50 of the fine silicon carbide particles is 10-20μm. Preferably, the coarse silicon carbide particles and the fine sil...

Example Embodiment

[0034] Example 1

[0035] The preparation method of the aluminum silicon carbide material of the present embodiment is:

[0036] (1) Mix 100 parts by weight of coarse silicon carbide particles (D50=146 μm) and fine silicon carbide particles (D50=16 μm) in a weight ratio of 2:1, then add 1 weight part of aluminum nitrate aqueous solution and 2 The phenolic resin ethanol solution in parts by weight is continuously mixed to obtain a mixture.

[0037] (2) Dry the mixture at 80°C for 1 hour, and after cooling to room temperature, pass it through a granulator through an 80-mesh sieve to obtain granules, wherein the humidity is controlled at 2%.

[0038] (3) Fill the pellets into a steel mold, and shape under a pressure of 18 MPa, and the molding time is 30 s to obtain a green body.

[0039](4) The green body is cured at 200°C for 4h.

[0040] (5) Sinter the solidified green body at 1200° C. for 2 hours to obtain a silicon carbide preform S01.

[0041] (6) Put the silicon carbide...

Example Embodiment

[0042] Example 2

[0043] The preparation method of the aluminum silicon carbide material in this example is the same as that in Example 1, except that 5 parts by weight of aluminum nitrate aqueous solution and 3 parts by weight of phenolic resin ethanol solution are added in step (1). The aluminum silicon carbide material S2 is also obtained.

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PUM

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Abstract

The invention relates to an aluminum silicon carbide material which comprises aluminum and a silicon carbide prefabricated part. The aluminum silicon carbide material is characterized in that the silicon carbide prefabricated part is prepared from the following raw materials in parts by weight: 100 parts of silicon carbide particles, 1 to 10 parts of metal nitrate and 1 to 10 parts of a binding agent. The raw materials of the aluminum silicon carbide material contain metal nitrate, the metal nitrate can be thermally decomposed to generate corresponding metal oxide, connection between silicon carbide particles is enhanced, the strength of a silicon carbide prefabricated part is improved, and large-scale mass production is facilitated; and metal oxide generated by pyrolysis is attached to the surfaces of the silicon carbide particles so that oxidation of part of the silicon carbide particles can be effectively inhibited, generation of silicon dioxide is reduced, and the thermal conductivity of the aluminum-silicon carbide material is improved.

Description

technical field [0001] The invention specifically relates to an aluminum silicon carbide material and a preparation method thereof. Background technique [0002] Aluminum silicon carbide (AlSiC) is the abbreviation of aluminum-based silicon carbide particle-reinforced composite materials. Aluminum silicon carbide has outstanding advantages such as cheap raw materials, high thermal conductivity, and adjustable thermal expansion coefficient. It has been more and more widely used in the field of electronic packaging. application. [0003] CN105924178A discloses raw materials for the preparation of aluminum silicon carbide materials, including coarse silicon carbide particles and fine silicon carbide particles, and an aqueous aluminum dihydrogen phosphate solution of 1 to 3% of the total mass of the two silicon carbide particles and 5% of water, thereby preparing Aluminum silicon carbide material. However, the silicon carbide preforms prepared in this way have the defects of l...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B35/622C04B41/88
CPCC04B35/565C04B35/622C04B41/5155C04B41/88C04B2235/443C04B2235/602C04B2235/9607C04B41/4523C04B41/0072
Inventor 宫清周维徐强刘辉宋山青
Owner BYD CO LTD
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