Aluminum nitride powder, method for producing the same and use thereof
A manufacturing method and aluminum nitride technology are applied in the fields of aluminum nitride powder and its manufacture and use to achieve the effect of reducing energy
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[0072] Example 1
[0073] Use as figure 1 In the gas phase reaction apparatus shown, the reactor 2 is heated by the heating belt 1 and maintained at 500° C., and ammonia is introduced through the supply pipe 4 while being adjusted by the flow regulator 3 in the lower part of the reactor 2. At the same time, while being adjusted by the flow meter 5, triethylaluminum accompanied by nitrogen is introduced through the supply pipe 6. The flow rate was adjusted by the flow rate regulators 3 and 5 so that the residence time of the reaction gas in the heating zone (reaction zone) was 2 seconds. Also, the molar ratio of ammonia / triethylaluminum is 20.
[0074] The aluminum nitride powder generated in the reaction zone is carried out together with the unreacted gas through the upper part of the reactor 2, and is separated from the gas by the filter 7, and then is collected in the collector 8. The collected aluminum nitride powder was put into a stone mill tube, and heat treatment was perfor...
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[0077] Example 2
[0078] After being pulverized by a ball mill, add Y to 100 parts by weight of aluminum nitride. 2 O 3 3 parts by weight Y 2 O 3 The aluminum nitride powder was sintered in the same manner as in Example 1 except for the sintering aid. The density of the sintered body is 3.29g / cm 3 , Is the theoretical density (add Y 2 O 3 The latter correction value) is 99.4%, and the thermal conductivity is 110W / m·k.
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[0079] Example 3
[0080] Except that the heat treatment temperature is 1400° C., and the spherical medium to be ground and crushed is zirconia pellets of 0.5 mmφ, the other is the same as in Example 2 to synthesize aluminum nitride powder. The specific surface area of the heat-treated powder is 8.2m 2 / g, the specific surface area after crushing is 33m 2 / g, the primary particle diameter obtained by this conversion is 0.056 μm. In addition, the particle size of the secondary particles was 0.5 μm. Thus, the degree of agglutination was 8.9. The density of the obtained sintered body is 3.25g / cm 3 , Is 98.2% of the theoretical density. In addition, the thermal conductivity is 113 W / m·k.
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