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Preparation method of aluminum nitride powder

A technology of aluminum nitride and powder, applied in the field of preparation of inorganic non-metallic powder, can solve the problems of poor quality of aluminum nitride powder and the like

Active Publication Date: 2020-10-30
福建臻璟新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the quality of the aluminum nitride powder prepared by this invention is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of aluminum nitride powder, comprising the following steps:

[0029] Step S10, aluminum nitrate, calcium nitrate, acetylene black, polyethylene glycol are mixed, and the addition amount of acetylene black and aluminum nitrate is C / Al 2 o 3 The molar ratio of aluminum nitrate and calcium nitrate is 2.9:1, and the weight ratio of aluminum nitrate and calcium nitrate is 100:1.7, dissolved in deionized water, stirred and mixed evenly, heated to 70°C, added urea, and added dropwise while stirring. 8.5wt% ammonia solution, heated to 98°C, kept for 30 minutes, then placed in a heating furnace at 1250°C, kept for 1.5 hours under nitrogen atmosphere, to obtain the precursor;

[0030] Step S20, mechanically mixing the precursor obtained in step S10, mechanically mixing alumina balls as the ball milling medium, the weight ratio of the ball milling material to the ball milling medium is 1:5.5, and milling for 4.5 hours;

[0031] Step S30, put the mechanically...

Embodiment 2

[0035] A preparation method of aluminum nitride powder, comprising the following steps:

[0036] Step S10, aluminum nitrate, calcium nitrate, acetylene black, polyethylene glycol are mixed, and the addition amount of acetylene black and aluminum nitrate is C / Al 2 o 3 The molar ratio of aluminum nitrate and calcium nitrate is 2.6:1, and the weight ratio of aluminum nitrate and calcium nitrate is 100:0.8, and dissolved in deionized water, stirred and mixed evenly, heated to 65°C, added urea, and added dropwise while stirring. 5wt% ammonia solution, heated up to 95°C, kept for 20 minutes, then placed in a heating furnace at 1250°C, kept for 1 hour under nitrogen atmosphere, to obtain the precursor;

[0037] Step S20, mechanically mixing the precursor obtained in step S10, mechanically mixing alumina balls as the ball milling medium, the weight ratio of the ball milling material to the ball milling medium is 1:5, and milling for 3 hours;

[0038] Step S30, put the mechanically m...

Embodiment 3

[0042] A preparation method of aluminum nitride powder, comprising the following steps:

[0043]Step S10, aluminum nitrate, calcium nitrate, acetylene black, polyethylene glycol are mixed, and the addition amount of acetylene black and aluminum nitrate is C / Al 2 o 3 The molar ratio of aluminum nitrate and calcium nitrate is 3.2:1, and the weight ratio of aluminum nitrate and calcium nitrate is 100:2.6, dissolved in deionized water, stirred and mixed evenly, heated to 75°C, added urea, and added dropwise while stirring. 12wt% ammonia solution, heated to 100°C, kept for 40 minutes, then placed in a heating furnace at 1250°C, kept for 2 hours under nitrogen atmosphere, to obtain the precursor;

[0044] Step S20, mechanically mixing the precursor obtained in step S10, mechanically mixing alumina balls as the ball milling medium, the weight ratio of the ball milling material to the ball milling medium is 1:6, and milling for 6 hours;

[0045] Step S30, put the mechanically mixed ...

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Abstract

The invention discloses a preparation method of aluminum nitride powder. The preparation method comprises the following steps of: mixing aluminum nitrate, calcium nitrate, acetylene black and polyethylene glycol, dissolving in deionized water, uniformly stirring and mixing, heating to 65-75 DEG C, adding urea, dropwise adding an ammonia water solution, heating and keeping for 20-40 minutes, putting into a 1250 DEG C heating furnace, and keeping the temperature for 1-2 hours in a nitrogen atmosphere to obtain a precursor; mechanically mixing the precursor; putting the mechanically mixed precursor into a microwave high-temperature sintering furnace, and carrying out nitriding treatment to obtain carbon-containing aluminum nitride; and putting the carbon-containing aluminum nitride into a decarburization furnace for decarburization so as to obtain aluminum nitride powder. The prepared aluminum nitride powder has the characteristics of uniform particle size distribution, small particle size, high purity and low impurity oxygen content, the preparation method is simple, the preparation process is easy to operate, and the aluminum nitride powder is suitable for large-scale production andprocessing.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic non-metallic powder, in particular to a preparation method of aluminum nitride powder. Background technique [0002] Aluminum nitride powder has good thermal, electrical and mechanical properties, high thermal conductivity, low thermal expansion coefficient and matching with silicon, good insulation and dielectric properties, and strong high-temperature materials. It is used in power electronics, aerospace, It has broad application prospects in national defense and military, automobile and locomotive, communication and other industrial fields. [0003] At present, the methods for preparing aluminum nitride powder mainly include the direct nitriding method of aluminum powder, the carbon thermal reduction method of alumina, the chemical vapor deposition method, the high temperature self-propagating synthesis method and the plasma chemical synthesis method. The direct nitriding meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/072
CPCC01B21/0726C01B21/0728C01P2006/80Y02P20/10
Inventor 林伟毅刘卫平钟建智
Owner 福建臻璟新材料科技有限公司
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