在LiCl-KCl-AlCl3熔盐中直接电化学还原Sm2O3及Al-Sm合金的形成

引用本文: 薛云, 王倩, 颜永得, 陈浪, 张密林, 张志俭. 在LiCl-KCl-AlCl₃熔盐中直接电化学还原Sm₂O₃及Al-Sm合金的形成[J]. 无机化学学报, 2013, 29(9): 1947-1951. doi: 10.3969/j.issn.1001-4861.2013.00.282 shu

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

在LiCl-KCl-AlCl₃熔盐中直接电化学还原Sm₂O₃及Al-Sm合金的形成

薛云 ^1, ,
王倩 ^2, ,
颜永得 ^1,2, ,
陈浪 ^2, ,
张密林 ^2, ,
张志俭 ^1,

基金项目:
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)

摘要: 在803 K LiCl-KCl熔盐中,研究了通过添加助剂AlCl₃直接电化学还原Sm₂O₃和Al-Sm合金的形成。以SmCl₃为原料作为参照,采用循环伏安和方波伏安方法,研究了Sm₂O₃在LiCl-KCl-AlCl₃熔盐体系中的电化学行为。通过对比发现在两个体系中,峰的数量和位置基本一致,这说明在LiCl-KCl熔盐中,加入AlCl₃之后,可以将Sm₂O₃有效氯化。计时电位结果表明,当阴极电流比-139.8 mA·cm^-2更负时,Al和Sm共同还原。为了提取Sm,采用恒电流从LiCl-KCl-AlCl₃-Sm₂O₃熔盐中电解得到Al-Sm合金样品,并进行XRD表征,结果表明可以通过调节AlCl₃和Sm₂O₃的浓度得到不同相的Al-Sm合金。

关键词:

钐;铝;合金;电化学;LiCl-KCl熔盐;电沉积

English

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
Fund Project:
国家自然基金(No.21103033,21101040,91226201)

黑龙江省高校青年学术骨干支持计划(No.1253G016)

中国博士后科学基金特别资助 (No.2013T60344)

中央高校基本科研业务费 (No.HEUCF131502)资助项目。

Abstract: 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.

Key words:

samarium;aluminum;alloys;electrochemistry;LiCl-KCl melts;electrodeposition

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在LiCl-KCl-AlCl₃熔盐中直接电化学还原Sm₂O₃及Al-Sm合金的形成

English

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

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