Synthesizing Silicon Nitride Whiskers by Solvothermal and Carbothermal Methods

摘要：

　　Xerogel was prepared by the sol-gel method using ethyl ester orthosilicate,alcohol,carbamide and glucose with various contents as raw materials.The precursor powders were obtained after xerogel was solvothermally treated at 220℃ for 2.5 h.IR analyses showed that the Si-O-Si and Si-O-NH2 bond are obtained in the precursors.XRD analyses indicated that the powders prepared by the solvothermal method are amorphous.Si3N4 powders are produced by heat-treating the precursors at 1400 ℃ in N2.It was proved that the synthesized powders are α-Si3N4 whiskers.With the increase of the glucose contents and the heat-treating temperature,the crystallization of Si3N4 is obviously improved.

关键词： Silicon nitride Solvoethermal method Carbothermal method Whiskers

作者: Guoqiang Tan Hongyan Miao Huijun Ren Zhiwei Yu Jia Li Huiqin Li

作者单位: School of Materials Science and Engineering,Shaanxi University of Science and Technology,Xian 710021,Shaanxi,the Peoples Republic of China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 868-870

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）