摘要
本文对稻壳合成ＳｉＣ晶须（简称ＳｉＣｗ）及ＳｉＣ颗粒（简称ＳｉＣｐ）进行了热力学分析，确定了基元反应，设计了ＳｉＣｗＶＬＳ生长的新型复合催化剂。研究表明：在稻壳合成ＳｉＣｗ的反应中，ＳｉＣｐ的生成是不可避免的；在新型复合催化剂作用下，ＳｉＣｗ的生成率可达３０％以上；ＳｉＣｗ的生长为粗糙界面生长机制，ＳｉＣｗ表面光滑。
The thermodynamics analyses of synthesizing SiC whiskers(SiC w)and SiC particle(SiC p)from rice hulls are studied,elementary reactions are determined,and a new composite catalyst for growing SiC w by VLS process is designed in this paper.The result show that the growth of SiC p can’t avoid during the reaction of synthesizing SiC w from rice hulls.With the role of the new composite catalyst,the yield percentage of SiC w can reach over 30%,the growth mechanism of the SiC w is the rough interface mechanism,and the SiC w have smooth surface with β SiC single crystals.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
1997年第1期33-39,共7页
Journal of Synthetic Crystals
基金
国家"863"计划资助
关键词
热力学
催化剂
碳化硅晶须
rice hull
SiC whisker
SiC particle
thermodynamics
catalyst
growth mechanism
