Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of aluminium nitride powder

A technology of aluminum nitride and powder, applied in the field of preparation of aluminum nitride powder, can solve the problem of uneven mixing of powder and carbon black or graphite powder, low activity of carbon black or graphite powder, and aluminum nitride powder. The problems such as the decline of body mass can achieve the effect of good powder application performance, low production cost and uniform grain size.

Inactive Publication Date: 2013-10-09
SHANDONG UNIV OF TECH
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that Al 2 o 3 The powder and carbon black or graphite powder are mixed unevenly and the activity of carbon black or graphite powder is low, so that Al 2 o 3 The reduction is incomplete and becomes an impurity in the product
In addition, the carbon black or graphite powder remaining in the aluminum nitride powder has low activity, and a higher temperature (greater than 600°C) is required for decarburization to make C generate carbon monoxide or carbon dioxide in an oxidizing atmosphere and remove it. The higher the temperature, the powder The higher the oxygen content in the body, the lower the quality of the aluminum nitride powder

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Raw material preparation:

[0022] Step 1: Mix 0.1 μm alumina powder and phenolic resin in a mixer with a weight ratio of 5:0.5, solidify at a temperature of 80°C, and then pulverize in a powder mill to form an average Raw material powder 1 with a particle size of 10 μm.

[0023] The second step: the above-mentioned raw material powder 1 and phenolic resin are mixed uniformly in a mixer mill at a weight ratio of 5:1, solidified at a temperature of 50 ° C, and then pulverized in a powder mill to make an average particle size of 20μm raw material powder 2.

[0024] The third step: the above-mentioned raw material powder 2 and phenolic resin are mixed uniformly in a mixer mill at a ratio of 5:2 by weight, solidified at a temperature of 40° C., and then pulverized in a powder mill to make an average particle size of 50μm raw material powder3.

[0025] 2. Aluminum nitride powder synthesis:

[0026] The above-mentioned raw material powder 3 was compacted under a pressu...

Embodiment 2

[0031] 1. Raw material preparation:

[0032] Step 1: Mix 1.5 μm alumina powder and phenolic resin in a mixer with a weight ratio of 5:0.75, solidify at a temperature of 90°C, and then pulverize in a powder mill to make a particle size Raw material powder 1 of 15 μm.

[0033] The second step: mix the above-mentioned raw material powder 1 and phenolic resin with a weight ratio of 5:1.5 in a mixer mill, solidify at a temperature of 75 ° C, and then pulverize in a powder mill to make a raw material with a particle size of 35 μm Powder 2.

[0034] The third step: mix the above-mentioned raw material powder 2 and phenolic resin in a mixing mill with a weight ratio of 5:2.5, solidify at a temperature of 60°C, and then pulverize in a powder mill to make a raw material with a particle size of 75 μm Powder3.

[0035] 2. Aluminum nitride powder synthesis:

[0036] The above-mentioned raw material powder 3 was compacted under a pressure of 1.5 MPa, and then fired at a temperature of 1...

Embodiment 3

[0041] 1. Raw material preparation:

[0042] The first step: Mix 3 μm alumina powder and phenolic resin in a mixer with a weight ratio of 5:1, solidify at a temperature of 100°C, and then pulverize in a powder mill to make a particle size of Raw material powder 1 of 20 μm.

[0043] Step 2: Mix the above-mentioned raw material powder 1 and phenolic resin in a mixing mill at a weight ratio of 5:2, solidify at a temperature of 100°C, and then pulverize in a powder mill to make a raw material with a particle size of 50 μm Powder 2.

[0044] Step 3: Mix the above-mentioned raw material powder 2 and phenolic resin in a mixing mill at a weight ratio of 5:3, solidify at a temperature of 80°C, and then pulverize in a powder mill to make a raw material with a particle size of 100 μm Powder3.

[0045] 2. Aluminum nitride powder synthesis:

[0046] The above-mentioned raw material powder 3 was compacted under a pressure of 3 MPa, and then fired in a nitrogen atmosphere at a temperatur...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of aluminium nitride powder, comprising the following steps: burdening, mixing, solidifying, preparing powder, pressing for forming, sintering, decarbonising and pulverizing. The preparation method is characterized in that phenolic resins and the aluminium oxide powder of which the granularity is 0.1-3mu m are mixed to obtain pug; solidifying at the temperature of 40-100DEG C; preparing powder; pressing into a block body; at the temperature of 1300-2000DEG C, sintering under the nitrogen atmosphere to obtain the aluminium nitride block body; and smashing after decarburization to obtain the aluminium nitride powder. The preparation method has the characteristics of simple technology, high aluminium nitride powder purity and low cost and is superfine.

Description

technical field [0001] The invention relates to a method for preparing aluminum nitride powder, which belongs to the technical field of ceramic powder preparation. Background technique [0002] At present, aluminum nitride powder is mainly composed of Al 2 o 3 Prepared by carbothermal reduction method, the reaction equation is: [0003] Al 2 o 3 +3C=Al 2 o 3 +3CO↑ [0004] The above reaction process belongs to the solid-solid reaction type, and the reaction process is controlled by the diffusion of substances. The disadvantage of this method is that Al 2 o 3 The powder and carbon black or graphite powder are mixed unevenly and the activity of carbon black or graphite powder is low, so that Al 2 o 3 The reduction is incomplete and becomes an impurity of the product. In addition, the carbon black or graphite powder remaining in the aluminum nitride powder has low activity, and a higher temperature (greater than 600°C) is required for decarburization to make C gener...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/581C04B35/626
Inventor 唐竹兴许珂洲赵霞
Owner SHANDONG UNIV OF TECH