超细等轴状AlN粉体的燃烧合成制备及机理研究

doi:10.11896/cldb.23120118

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Abstract Ultrafine equal-axis AlN powder has found wide application in the fields such as electronic packaging, semiconductor, etc. owing to its high sintering activity, and good fluidity and dispersibility. The preparation of equal-axis AlN powder through conventional methods nevertheless usually requires long soaking time at high temperatures, resulting in high cost and therefore limiting its application. The present work made a satisfying attempt to prepare ultrafine equal-axis AlN powder via a high-efficiency and low-cost combustion synthesis process using Al and AlN powders as raw materials, and systematically studied the effects of AlN diluent dosage and N₂ pressure on the combustion temperature and the products' phase composition and microstructure. The results showed that both the increase in AlN diluent dosage and the decrease in N₂ pressure led to the reduction of combustion temperature, which was conducive to the in-situ nitriding of Al powder to obtain ultrafine equal-axis AlN powder. By adopting an AlN dosage of 60mol% and a N₂ pressure of 0.2 MPa, the equal-axis AlN powder with an average particle size of 1.5 μm was obtained. Furthermore, the underlying occurrences during the in-situ nitriding growth of equal-axis AlN powder were revealed by the gas-releasing assisted quenching experiments.

Key words： combustion synthesis aluminum nitride powder growth mechanism

Published: 10 January 2025 Online: 2025-01-10

CLC number:

TB321

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	LI Mingxin
	WEI Zhilei
	ZHANG Biao
	ZHAO Lei
	SHI Zhongqi

Cite this article:

LI Mingxin,WEI Zhilei,ZHANG Biao, et al. Combustion Synthesis of Ultrafine Equal-axis AlN Powder and the Underlying Occurrences[J]. Materials Reports, 2025, 39(1): 23120118-5.

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https://www.mater-rep.com/EN/10.11896/cldb.23120118 OR https://www.mater-rep.com/EN/Y2025/V39/I1/23120118

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