Fabrication of one-dimensional rod-like alpha-SiAlON powders in large scales by combustion synthesis


alpha-SiAlON powders consisting of one-dimensional rod-like microcrystals were prepared by combustion synthesis in large scales. No obvious negative effect on reaction products was noticed by the increase of sample size, and alpha-SiAlON was synthesized as predominant phase in all the samples, even in CS-CL with the weight of 1000 g. These results showed good repeatability of combustion synthesis and its great potential in industrial production of alpha-SiAlON powders in large quantities. According to the phase composition of intermediate product, the reaction procedurein combustion synthesis of Ca alpha-SWON was proposed. At the same time, the strong influence of different starting compositions on the grain morphology of Yb alpha-SiAlON products was explained with the consideration of reaction temperature and grain growth character. (C) 2007 Elsevier B.V. All rights reserved.



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Chemistry; Materials Science; Metallurgy & Metallurgical Engineering


Liu, GH; Pereira, C; Chen, KX; Zhou, HP; Ning, XS; Ferreira, JMF

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