Reduction behaviour of rice husk ash for preparation of high purity silicon
Reduction behaviour of rice husk ash for preparation of high purity silicon
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DOI：
10.1179/000844311x13117643274677
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发表时间：
2011-10-01
影响因子：
0.9
通讯作者：
McLean, A.
中科院分区：
文献类型：
--
作者：
Larbi, K. K.;Barati, M.;McLean, A.
以镁为还原剂，对稻壳灰白炭黑还原制备高纯硅进行了研究。制备镁含量变化超过化学计量要求0-25重量%的复合镁-RHA粒料，并在流动氩气下在600-900 ℃的温度范围内加热。通过差热分析和温度曲线记录发现，RHA二氧化硅与镁的反应在类似于575 ℃下被触发。还原产物的定量X射线衍射分析表明，球团的初始镁含量和还原停留温度对硅的产率有显着影响。在该研究中，在900 ° C的还原温度下具有超过化学计量量的5重量%镁的装料给出最大硅产率。
The reduction of rice husk ash (RHA) silica for the preparation of high purity silicon was studied using magnesium as the reducing agent. Composite magnesium-RHA pellets with magnesium content varying 0-25 wt-% in excess of stoichiometry requirement were made and heated in the temperature range of 600-900 degrees C under flowing argon. It was found through differential thermal analysis and temperature profile recording that the reaction of RHA silica with magnesium was triggered at similar to 575 degrees C. Quantitative X-ray diffraction analyses of the reduction products showed that both initial magnesium content of the pellets and the reduction dwell temperature had a significant influence on the yield of silicon. In this study, a charge with 5 wt-% magnesium in excess of the stoichiometric amount at a reduction temperature of 900 degrees C gave a maximum silicon yield.