On the Progress of Combustion Synthesis of Si3N4 Ceramic: From Laboratory Research to Industrial Production


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The progress on the combustion synthesis of Si3N4 powders during the past decades was summarized with the emphasis on the recently developed mechano-chemically activated combustion synthesis (MACS) method. The effects of processing parameters such as the addition of diluent and ammonium salts into the green mixtures, the variation of nitrogen pressure as well as the mechanical activation treatment on the degree of Si to α-Si3N4 conversion was evaluated. The combination of mechanical activation and chemical stimulation was effective in enhancing the reactivity of Si powder reactants, which was responsible for the extension of the minimum nitrogen pressure normally required for the combustion synthesis of Si3N4. This breakthrough indicates that nitriding combustion of silicon in pressurized nitrogen could be promoted by activating the solid reactants instead of by increasing the pre-exerted nitrogen pressure. The MACS process was successfully applied to the industrial production of Si3N4 powders, the regularities for the large-scale synthesis were reported, and the as-synthesized Si3N4 powder products were systematically characterized.



Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong






J. T. Li et al., "On the Progress of Combustion Synthesis of Si3N4 Ceramic: From Laboratory Research to Industrial Production", Key Engineering Materials, Vols. 336-338, pp. 911-915, 2007

Online since:

April 2007




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