LiF-SmF3-Sm2O3熔盐中Sm(Ⅲ)的电化学行为研究  

Electrochemical Behavior of Sm(Ⅲ) in LiF-SmF3-Sm2O3 Molten Salt

作　　者：张禛 张小联[1] 杨初斌[1] 方玲[1] 韩宝军[1] ZHANG Zhen;ZHANG Xiaolian;YANG Chubin;FANG Ling;HAN Baojun(Magnesium Alloy Materials Engineering Technical Research Center of Jiangxi Province,Ganzhou 341000,China)

机构地区：[1]赣南师范大学江西省镁合金工程技术研究中心,江西赣州341000

出　　处：《赣南师范大学学报》2018年第6期46-49,共4页Journal of Gannan Normal University

基　　金：国家自然科学基金项目(451063).

摘　　要：以SmF3-LiF-Sm2O3为熔盐体系,Sm2O3为原料,分别采用循环伏安法、方波伏安法、计时电位法研究钐离子在惰性钨电极和活性铜电极上的电化学行为.结果表明,在惰性钨电极上,Sm(Ⅲ)离子的还原反应是通过2步电子转移完成,其反应为准可逆反应且扩散系数为4.05×10^-5cm^2·s^-1.根据活性电极Cu上循环伏安曲线可见,电解可获得2种Sm-Cu金属间化合物,对应的电流密度分别为-0.231A·cm^-2和-0.782 A·cm^-2.The electrochemical behaviors of samarium ions on inert tungsten electrode and active copper electrode were studied by cyclic voltammetry,square wave voltammetry and chronopotentiometry in SmF3-LiF-Sm2O3 molten salt system.The results indicated that the reduction reaction of Sm(Ⅲ)ions on the inert tungsten electrode was completed by two-step electron transfer,and the reaction was quasi-reversible.The diffusion coefficient of Sm(Ⅲ)was 4.05×10^-5 cm^2·s-1 which obtained by the chronopotentiometry.There are two kinds of Sm-Cu intermetallic compounds could be obtained According to the cyclic voltammetry curve of the active electrode Cu,and the corresponding current densities were-0.231 A·cm^-2 and-0.782 A·cm^-2,respectively.

关 键 词：稀土钐 熔盐电解 电化学过程 扩散控制 

分 类 号：TF111.522[冶金工程—冶金物理化学]