Combustion Synthesis of α-Si3N4 Powder under Low Nitrogen Pressure

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A combustion synthesis reaction has been developed for the α-Si3N4 powder under low nitrogen pressure. Si and solid state nitrogen source were used as the reactants, and ammonium halide powders were added as a catalytic agent. These powders were mixed and pressed into a cylindrical compact and wrapped up with an ignition agent (i.e., Ti + C). The synthesis reaction was triggered by combustion of the igniting agent. The product as synthesized is composed mostly of α-phase and in the form of agglomerated fine particles (0.1-1 μm in diameter). The effects of the additives and other experimental parameters on the process were investigated and a possible reaction mechanism was also proposed.

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Periodical:

Edited by:

P. VINCENZINI

Pages:

989-993

DOI:

10.4028/www.scientific.net/AST.45.989

Citation:

C. W. Chang and S. L. Chung, "Combustion Synthesis of α-Si3N4 Powder under Low Nitrogen Pressure", Advances in Science and Technology, Vol. 45, pp. 989-993, 2006

Online since:

October 2006

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$38.00

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