稻壳合成β-SiC晶须的工艺及机理研究

Study on the Growth Technology and Mechanism of β-SiC Whisker Synthesized from Rice Hulls

本文对稻壳合成β－ＳｉＣ晶须的工艺条件进行了研究，结果表明：温度、硅碳比对ＳｉＣ晶须转化率有较大影响，Ａｒ气流量的影响较小，在最佳工艺条件下，生成物中ＳｉＣ晶须含量可达３０％以上。并从理论上探讨了ＳｉＣ晶须的生长机理。

Technological conditions for synthesis of β-SiC whiskers from rice hulls are studied in this paper. The experimental results have shown that the temperature and the ratio of Si to C have greater effect on the conversion rate of SiC whiskers, and Ar gas flow has less effect. Under the best technological conditions, the SiC whisker mass content can reach 30% or more. Besides, the growth mechanism of SiC whiskers is presented.