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Surface modification method of silicon carbide micropowder

A silicon carbide micropowder and surface modification technology, which is applied in the field of silicon carbide micropowder processing, can solve the problems of poor particle dispersion, poor product stability, and long production cycle, and achieve uniform coating, improved dispersion performance, and production efficiency. high effect

Active Publication Date: 2014-06-04
连云港海蓝研磨材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wet modification has disadvantages such as high energy consumption, poor particle dispersion, long production cycle, high labor intensity, and poor product stability.

Method used

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  • Surface modification method of silicon carbide micropowder

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, a kind of surface modification method of silicon carbide micropowder, its steps are as follows:

[0023] (1) Configure two modifier solutions: one is a silane coupling agent ethanol solution with a mass concentration of 5-30% obtained by mixing a silane coupling agent with ethanol;

[0024] Among them, the silane coupling agent is methyltriethoxysilane, vinyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethyl(ethyl)oxysilane, γ-(2, One or more of 3-glycidyloxy)propyltrimethoxysilane, 3-aminopropyltriethoxysilane, and γ-(methacryloyloxy)propyltrimethoxysilane;

[0025] The other is a water-soluble polymer aqueous solution with a mass concentration of 5-30% obtained by mixing a water-soluble polymer with water;

[0026] Wherein the water-soluble polymer is one or more of polyethylene glycol, polyacrylamide, polyacrylate, polyethyleneimine, carboxymethyl cellulose;

[0027] (2) Dry modification of silicon carbide micropowder: first preheat the silicon ...

Embodiment 2

[0028] Embodiment 2, in the surface modification method of the silicon carbide micropowder described in embodiment 1, the silane coupling agent described in step (1) is by the methyl triethyl ethyl that mass ratio is 1~3:1~3:1 Oxysilane, vinyltriethoxysilane and 3-aminopropyltriethoxysilane, preferably methyltriethoxysilane, vinyltriethoxysilane and 3-aminopropyltriethoxysilane The mass ratio of oxysilane is 2:2:1.

Embodiment 3

[0029] Example 3, in the surface modification method of silicon carbide micropowder described in Example 1, the silane coupling agent described in step (1) is composed of N-(β-aminoethyl with a mass ratio of 1:2~4 )-γ-aminopropyltrimethyl(ethyl)oxysilane and γ-(2,3-glycidoxy)propyltrimethoxysilane are mixed, preferably with a mass ratio of 1:3.

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Abstract

The invention relates to a surface modification method of silicon carbide micropowder. Two modifying agents are adopted to perform two-step dry modification of the silicon carbide micropowder. The surface modification method comprises steps of: preparing an ethanol solution of a silane coupling agent and an aqueous solution of water-soluble polymer, preheating the silicon carbide micropowder at 30-70 DEG C for 20-60 min, spraying the ethanol solution of the silane coupling agent in a form of mist into the silicon carbide micropowder stirred at a high speed, stirring and drying at 110-150 DEG C for 0.5-3 h, spraying the aqueous solution of the water-soluble polymer preheated to 30-80 DEG C in a form of mist into the silicon carbide micropowder stirred at a high speed, and stirring and drying at 110-150 DEG C for 0.5-3 h to obtain surface modified silicon carbide micropowder. The surface modification method aims at dry-method modification of the silicon carbide micropowder, and is capable of effectively solving the dispersibility problem of the dispersibility, and improving the uniformity and increasing the powder yield of granulation of the silicon carbide micropowder.

Description

technical field [0001] The invention relates to a method for treating silicon carbide micropowder, in particular to a method for surface modification of silicon carbide micropowder. Background technique [0002] Silicon carbide ceramics have excellent characteristics such as high temperature strength, strong oxidation resistance, good wear resistance, good thermal stability, small thermal expansion coefficient, high thermal conductivity, high hardness and chemical corrosion resistance. Therefore, it has shown its talents in many fields and has been paid more and more attention by people. For silicon carbide ceramics, the preparation of uniform and stable dispersed powder is the key to successful sintering. However, due to the small particle size and high surface energy of silicon carbide powder, it is easy to cause agglomeration and form secondary particles, which makes it difficult to exert the advantages of ultrafine powder, and ultimately affects the excellent performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/628C04B35/565
Inventor 李明涛沈春英刘宝郑海杨学根胡增涵李家茂
Owner 连云港海蓝研磨材料有限公司
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