Aluminum nitride powder and preparation method thereof

An aluminum nitride and powder technology, applied in the field of aluminum nitride powder and its preparation, can solve the problems of unsatisfactory anti-hydrolysis and anti-oxidation properties, large particle size of aluminum nitride and high energy consumption, and achieve excellent hydrolysis resistance. and antioxidant properties, uniform particle size distribution, and low energy consumption

Active Publication Date: 2021-06-04
HEBEI LIFU CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of aluminum nitride powder and its preparation method, to solve the problems of large particle size and energy consumption of aluminum nitride prepared in the prior art High and unsatisfactory resistance to hydrolysis and oxidation

Method used

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  • Aluminum nitride powder and preparation method thereof
  • Aluminum nitride powder and preparation method thereof
  • Aluminum nitride powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 150g of alumina powder and 1.76kg of monocrystalline sugar C at the same time 6 (H 2 O) 6 . The two were added to 3.3kg of distilled water and mixed thoroughly. Put the stirred reaction raw materials into the tray, and set the heating temperature and holding time curve. The heating temperature of the first section is set at 90° C., and the holding time is 18 hours. The heating temperature of the second stage is 125° C., and the holding time is 4 hours. The heating temperature of the third section is 170°C, and the holding time is 17h. The heating temperature of the fourth section is 190°C, and the holding time is 17h. The heating temperature in the fifth section is 210°C, and the holding time is 17h. The heat-treated raw materials are put into a reaction furnace for sintering, and the atmosphere is 20% hydrogen and 80% nitrogen. The gas flow rate is 4m 3 / h. After 17 hours, the reaction temperature rose to 1250°C, and the reaction temperature was maintai...

Embodiment 2～6

[0042] Change the mass ratio K1 of hydrochloric acid and ethylene terephthalate (see Table 1 for details), and other process operations are the same as in Example 1, and the hydrolysis resistance of the obtained product is tested, and the results are shown in Table 1.

[0043] Table 1:

[0044]

[0045] It can be concluded from Table 1 that compared with the reference patent CN200610085434.1, the present invention effectively improves the hydrolysis resistance of aluminum nitride powder.

Embodiment 7～12

[0047] Replace ethylene glycol terephthalate with ethyl acetate, change the mass ratio K1 of hydrochloric acid and ethyl acetate simultaneously (see Table 2 for details), other technological operations are the same as embodiment 1, test the hydrolysis resistance of gained product, result See Table 2.

[0048] Table 2:

[0049]

[0050] It can be seen from Table 2 that the present invention can effectively improve the hydrolysis resistance of aluminum nitride powder. Comparing Table 1 and Table 2, it can be seen that when the composition of the mixed solution is hydrochloric acid and ethylene terephthalate, and K1=0.5, the hydrolysis resistance of the aluminum nitride powder obtained is the best.

[0051] The aluminum nitride powder prepared in Example 1 and Example 10, the aluminum nitride powder prepared in Reference Example 1, and the control sample (aluminum nitride sample that has not been impregnated with a mixed solution in the present invention) are subjected to an ...

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Abstract

The invention provides aluminum nitride powder and a preparation method thereof. The preparation method comprises the following steps: taking monocrystal sugar as a carbon source, preparing aluminum nitride through a carbon thermal reduction method, and then carrying out dipping treatment through a mixed solution of hydrochloric acid and ethylene glycol terephthalate or ethyl acetate to obtain the surface-modified aluminum nitride powder. The aluminum nitride powder provided by the invention has excellent hydrolysis resistance and corrosion resistance, and the prepared powder can be processed under aqueous phase and non-aqueous phase conditions to further prepare an aluminum nitride material. The preparation method of the aluminum nitride powder provided by the invention has the characteristics of simple and environment-friendly preparation process, low energy consumption, uniform granularity, easiness in reaction and the like.

Description

technical field [0001] The invention relates to the technical field of aluminum nitride materials, in particular to an aluminum nitride powder and a preparation method thereof. Background technique [0002] Since aluminum nitride was first synthesized in 1862, due to its superior comprehensive performance, many countries in the world have carried out a lot of research, development and application of it. The application fields of aluminum nitride ceramics are very wide. In addition to being an ideal electronic insulating substrate and high-power LED packaging material in the electronics industry, the application in the field of ships and marine engineering has also attracted increasing attention. For example, aluminum nitride ceramics can be used as heat exchanger materials for marine gas turbines and heat-resistant parts of internal combustion engines. Aluminum nitride nanopowders can be used as lubricating oil additives to improve the friction and wear of friction parts and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/072
CPCC01B21/0726C01B21/0728Y02P20/10
Inventor 杨志平王旭郭静李璇璇刘学千赵金鑫王大伟
Owner HEBEI LIFU CHEM TECH
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