在LiCl-KCl-AlCl_3熔盐中直接电化学还原Sm_2O_3及Al-Sm合金的形成(英文)  

Direct Electrochemical Reduction of Sm_2O_3 and Formation of Al-Sm Alloys in LiCl-KCl-AlCl_3 Melts

作　　者：薛云 王倩 颜永得 陈浪 张密林 张志俭 

机构地区：[1]哈尔滨工程大学核安全与仿真技术国防重点学科实验室,哈尔滨150001 [2]哈尔滨工程大学超轻材料与表面技术教育部重点实验室,哈尔滨150001

出　　处：《无机化学学报》2013年第9期1947-1951,共5页Chinese Journal of Inorganic Chemistry

基　　金：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

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。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 vohammetry 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 AI 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.

关 键 词：钐 铝 合金 电化学 LiCl-KCl熔盐 电沉积 

分 类 号：O614.111[理学—无机化学] O614.22[理学—化学]