Synthesis of Silicon Carbide Powders from Iron Tailings

摘要：

Silicon carbide powders were prepared by the carbothermal reduction method. The starting powders used were iron tailings and graphite. The XRD results showed that the main crystal phase was SiC and the main impurity was FexSiy in as-fabricated silicon carbide. The SEM results revealed that the grains of SiC-phase in as-fabricated silicon carbide were flaky-like or globular-like. It is found that the carbon addition and the reaction temperature play a key role to obtain SiC-phase, while the holding time and argon flow rate had a little effect on the yield of SiC as the excessive carbon addition are used. The optimum sintering temperature, holding time, argon flowing rate, the ratio of n(C): n(SiO2) are 1500 ℃, 8 h, 0.6 L/min, 5:1, respectively.

关键词： Iron Tailings Silicon Carbide Powders Carbothermal Reduction

作者: Xiaomeng Zhang Lihua Xu Hongshun Hao Jianying Yang Fang He

作者单位: Department of Inorganic Non-metallic Materials, University of Science and Technology Beijing,Beijing China Petroleum group, Beijing CNPC100011, P.R.China

会议类型: 国际会议

会议名称: 10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)

会议地点: 西安

会议语种:英文

页码: 237-240

在线出版日期: 2009-01-13（万方平台首次上网日期，不代表论文的发表时间）