Low Cost Preparation For SiC Nanometer Powder and Thermodynamics Research

摘要：

Low cost Silicon Carbon nanometer powder was synthesized by carbonthermal reduction method with nanometer Silicon oxide and carbon black as material. Synthesis thermodynamics of low cost SiC powder was discussed, the influence of rare-earth element La on TG-DSC was analysed. This research indicated the synthesis process had two steps. The first step formed medial production SiOg and COg. And the second step synthesized silicon carbon finally. With the 0.3 wt％ of La added, at the first step the initiatory formed temperature declined from 1526℃ to 1357℃, the heat energy needed decreased from 223J/g to 34J/g; at the second step the initiatory formed temperature declined from 1351 to 1250 ℃ ℃, the heat energy needed decreased from 693J/g to 295J/g. under the technology of 1500℃ for 120min, average powder diameter is about 100nm. Without La added, average powder diameter is about 150nm, under the technology of 1550℃ for 120min.

关键词： Silicon carbon low cost La synthesis temperature nanometer powder

作者: 张宁 龙海波 朱克武 王柳燕

作者单位: 沈阳大学科学技术研究中心,110044

会议类型: 国际会议

会议名称: 第六届中国国际纳米科技研讨会

会议地点: 成都

会议语种:英文

在线出版日期: 2007-11-19（万方平台首次上网日期，不代表论文的发表时间）