Process for producing hydrolyzation resistant AlN powder

A technology of anti-hydrolysis and powder, which is applied in the field of material ceramics. It can solve the problems of poor stability of modified AlN powder, poor anti-hydrolysis ability of AlN powder, and powder no longer has hydrophobicity, so as to improve hydrolysis resistance and low production cost. , The effect of improving the hydrolysis resistance

Active Publication Date: 2009-08-19
NANJING UNIV OF TECH
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is: in order to solve the problems of poor hydrolysis resistance of AlN powder in high temperature and humid environment, poor stability of modified AlN powder in the process of water-based ball milling, etc., a new method for improving the hydrolysis resistance of AlN powder is proposed
This method is simple to operate, has good repeatability, and has outstanding anti-hydration effect. The modified powder is no longer hydrophobic, which effectively solves the problem that AlN is easily hydrolyzed in a humid environment.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for producing hydrolyzation resistant AlN powder
  • Process for producing hydrolyzation resistant AlN powder
  • Process for producing hydrolyzation resistant AlN powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A. With AlN powder 20g, Al(H 2 PO 4 ) 3 0.3g and H 3 PO 4 0.5g, add 20mL of absolute ethanol, ball mill for 2h, B. centrifuge the mixture after ball milling, and wash the AlN powder obtained by centrifugation with absolute ethanol 4 times;

[0025] C. Dry the washed AlN powder at 60° C. for 5 hours to obtain hydrolysis-resistant AlN powder.

[0026] Table 1 shows the change of the nitrogen content of the AlN powder before and after modification after soaking in water at 60°C for 24h. It can be seen from the table that after the modified powder is soaked in water at 60°C for 24 hours, the nitrogen content of the powder remains basically unchanged.

[0027] Table 2 shows the change of nitrogen content and pH value of the modified AlN powder in water ball milling (ball: material: water = 2:1:1) for a certain period of time. It can be seen from the table that even if the modified AlN powder is ball milled under high shear stress for a long time, the nitrogen content c...

example 2

[0034] A. AlN powder 20g, Al(H 2 PO 4 ) 3 0.3g and 0.7g of silicic acid, and added 16mL of absolute ethanol, ball milled for 4h.

[0035] B. Centrifuge the mixed solution after ball milling, and wash the AlN powder obtained by centrifugation 4 times with absolute ethanol;

[0036] C. Dry the washed AlN powder at 50° C. for 7 hours to obtain hydrolysis-resistant AlN powder.

example 3

[0038] A. AlN powder 20g, 1gAl(H 2 PO 4 ) 3 , and added 40mL of absolute ethanol, ball milled for 2h.

[0039] B. Centrifuge the mixed solution after ball milling, and wash the AlN powder obtained by centrifugation for 3 times with absolute ethanol;

[0040] C. Dry the washed AlN powder at 60° C. for 6 hours to obtain hydrolysis-resistant AlN powder.

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
thermal conductanceaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing a hydrolysis resistant AIN powder. In the method, the AIN powder is modified by esterification reaction between acid and hydroryl group and hydrolysis of the AIN powder in a humid environment is inhibited to improve hydrolysis resistance thereof. The method comprises the following steps: carrying out ball milling on AIN AI (H2PO4)3 and oxyacid in organic solution for several hours to lead hydroxide radical on surface of the AIN particles to react with acid and form a compact protective layer on the surface of the AIN particles; then washing the AIN powder for numerous times by absolute ethyl alcohol; and drying the washed AIN powder at the temperature of 50-70 DEG C, thus obtaining the hydrolysis resistant AIN powder. The modified AIN powder remains stable at the humid environment with the temperature below 80 DEG C and is free from hydrolysis reaction. The method of the invention is easy to operate with good reproducibility and outstanding anti-hydrating capacity, thus effectively solving the problem that the AIN is extremely prone to be hydrolyzed in the humid environment.

Description

technical field [0001] The invention relates to a preparation method of an anti-hydrolysis AlN powder, which improves the anti-hydrolysis performance of the AlN powder and improves the stability of the AlN powder in water-based ball milling without affecting the original performance of the AlN powder, and belongs to the technical field of material ceramics . Background technique [0002] AlN ceramics have high thermal conductivity (theoretical value is 320W·m -1 ·K -1 , the actual value can reach 100~280W·m -1 ·K -1 , which is equivalent to 5 to 10 times that of the traditional substrate material alumina), excellent insulation, high temperature resistance, corrosion resistance, and matching with the thermal expansion coefficient of silicon, etc., has become a new generation of large-scale integrated circuits, semiconductor module circuits And ideal heat dissipation and packaging materials for high-power devices. However, AlN powder is very easy to hydrolyze, which bring...

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 Applications(China)
IPC IPC(8): C04B35/581C04B35/626
Inventor 郭坚丘泰杨建李晓云沈春英冯永宝
Owner NANJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap