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Research Progress of the Synthesis of High Purity Silicon Nitride

ZHENG Yu;ZHANG Wei-ru;PENG Zhen-zhen;WANG Teng-fei;LI Bin;ZOU Jing-liang;ZHANG Zhe;Beijing Sinoma Synthetic Crystals Co.Ltd.;  
Silicon nitride ceramic is one of the best structural ceramics material. High purity,stable performance and low cost silicon nitride powder is the key factor of property and application of silicon nitride ceramics. This paper summarizes several kinds of preparation methods of silicon nitride powder which are commonly used currently,like nitriding of silicon,carbothermal reduction,self-propagating high temperature synthesis. The mechanisms and characteristics of these methods are analyzed and compared. The future development of silicon nitride powder is also discussed in this paper.
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