Direct Synthesis of High Purity Silicon Wires by Electrorefining in Molten KF-NaF Eutectic  

KF-NaF熔盐中电解精炼制备高纯硅线

作　　者：邹祥宇[1] 谢宏伟[1] 翟玉春[1] 郎晓川[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819

出　　处：《Chinese Journal of Chemical Physics》2013年第1期88-94,I0004,共8页化学物理学报（英文）

摘　　要：The electrochemical synthesis silicon wires by electrorefining metallurgical grade silicon in thermally dried and pre-electrolyzed molten KF-NaF eutectic were studied at temperatures 800-900 ℃ using cyclic voltammetry and ac impedance. One oxidation peak at -0.14 V could be attributed to the reaction of Si to Si4＋. A cathodic peak occurred at -0.56 V in the cyclic voltammogram and one response semicircle in the ac impedance spectrum was observed, supporting a one-step electrochemical reduction process of Si4＋-→Si. The electrochemical reaction of silicon was controlled by the diffusion process. The purity of electrorefined silicon wires was up to 99.999% by ICP-MS analysis.

关 键 词：Silicon wire ELECTROREFINING Cyclic voltammetry ac impedance 

分 类 号：O[理学]