Application of Electromagnetic Induction Method in Preparation of SiC/Si3N4 Composite Powder from Polysilicon Waste

摘要：

　　SiC/Si3N4 composite powders were synthesized by electromagnetic induction heating in nitrogen atmosphere with polysilicon waste as main raw material and ammonium chloride(NH4Cl)as additive.The effects of ammonium chloride addition amount and heating time on SiC/Si3N4 composite powders were studied.Results showed that the main phase of polysilicon waste consisted of Si and SiC,which could react with nitrogen at high temperature to form powders mainly composed of α-Si3N4,β-Si3N4 and SiC.With the increase of NH4Cl,the fibrous α-Si3N4 in the synthetic products increased.And the Si3N4 in the composite powders also increased with the rise of heating time,this was mainly because prolonging heating time can effectively promote the nitridation of silicon powder.A new method of electromagnetic induction heating is proposed to prepare the SiC/Si3N4 composites with heating cheap polysilicon waste and NH4Cl,which provided an economically attractive production route.

关键词： SiC/Si3N4 composite powder polysilicon waste NH4Cl Electromagnetic induction heating

作者: SUN Qiaoyang HOU Xinghui LIU Zhaoyang JIN Endong YUAN Lei YU Jingkun

作者单位: Northeastern University,Shenyang 110819,China

会议类型: 国际会议

会议名称: Conference on Refractories International 2018, CRI2018)(2018国际耐火材料学术会议)

会议地点: 杭州

会议语种:英文

页码: 1-5

在线出版日期: 2018-10-17（万方平台首次上网日期，不代表论文的发表时间）