Citation: XUE Yun, WANG Qian, YAN Yong-De, CHEN Lang, ZHANG Mi-Lin, ZHANG Zhi-Jian. Direct Electrochemical Reduction of Sm₂O₃ and Formation of Al-Sm Alloys in LiCl-KCl-AlCl₃ Melts[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(9): 1947-1951. doi: 10.3969/j.issn.1001-4861.2013.00.282 shu

Direct Electrochemical Reduction of Sm₂O₃ and Formation of Al-Sm Alloys in LiCl-KCl-AlCl₃ Melts

1.
1 Key Discipline Laboratory of Nuclear Safety and Simulation Technology, Harbin Engineering University, Harbin 150001, China;

Received Date: 18 January 2013
Available Online: 10 May 2013
Fund Project: 国家自然基金(No.21103033,21101040,91226201) (No.21103033,21101040,91226201)黑龙江省高校青年学术骨干支持计划(No.1253G016) (No.1253G016)中国博士后科学基金特别资助 (No.2013T60344) (No.2013T60344)中央高校基本科研业务费 (No.HEUCF131502)资助项目。 (No.HEUCF131502)

Direct electrochemical reduction of Sm₂O₃ and formation of Al-Sm alloys were investigated in LiCl-KCl melts by using additive AlCl₃ at 803 K. The electrochemical behaviors of Sm₂O₃ and SmCl₃ raw material in LiCl-KCl-AlCl₃ melts were characterized by cyclic voltammetry and square wave voltammetry. Galvanostatic electrolysis was carried out to extract Sm element from LiCl-KCl-AlCl₃ melts, and the deposits were characterized by X-ray diffraction (XRD). The numbers and potential regions of the peaks obtained from the two systems are almost the same, indicating that the Sm₂O₃ is chloridized by AlCl₃ in the LiCl-KCl melt. The chronopotentiometry result indicates that the coreduction of Al and Sm occurs when the cathodic current is more negative than-139.8 mA·cm^-2. Al-Sm alloys with different phases can be obtained by adjusting the concentration of AlCl₃ and Sm₂O₃.
- samarium;aluminum;alloys;electrochemistry;LiCl-KCl melts;electrodeposition
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Direct Electrochemical Reduction of Sm₂O₃ and Formation of Al-Sm Alloys in LiCl-KCl-AlCl₃ Melts