熔盐电解制备Mg-Ce中间合金电化学过程研究  

Study on the Electrochemical Process of Mg-Ce Intermediate Alloys Prepared by Molten Salt Electrolysis

作　　者：宋智涛 赵佳 路贵民[1,2] SONG Zhitao;ZHAO Jia;LU Guimin(National Engineering Research Center for Integrated Utilization of Salt Lake Resources,East China University of Science and Technology,Shanghai 200237,China;Joint International Laboratory for Potassium and Lithium Strategic Resources,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学盐湖资源综合利用国家工程研究中心,上海200237 [2]华东理工大学钾锂战略资源国际联合实验室,上海200237

出　　处：《有色金属（冶炼部分）》2024年第3期108-114,共7页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(U21A20323)。

摘　　要：通过循环伏安法(CV)、方波伏安法(SWV)和开路计时电位法(OCP)研究了温度为973 K时KCl-NaCl-CeCl_(3)-MgCl_(2)四元熔盐体系中Mg(Ⅱ)和Ce(Ⅲ)在钨电极上的电化学行为以及合金化过程。根据电化学分析的结果,以钨丝为工作电极,石墨棒为辅助电极,于-2.1 V(vs.Ag AgCl)恒电位电解12 h制取Mg-Ce合金。通过X射线衍射(XRD)、扫描电镜(SEM)和能谱仪(EDS)对电解所得合金的组成以及元素分布进行表征,结果表明合金的基底相为Mg_(17)Ce_(2),第二相为Mg_(3) Ce。The electrochemical behaviors of Mg(Ⅱ)and Ce(Ⅲ)as well as the alloying process of Mg(Ⅱ)and Ce(Ⅲ)on tungsten electrodes in the molten salt system of KCl-NaCl-CeCl_(3)-MgCl_(2) at 973 K have been investigated by cyclic voltammetry(CV),square-wave voltammetry(SWV),and open-circuit chrono-potentiostatic(OCP)methods.Based on the results of electrochemical analysis,the Mg-Ce alloys were prepared by electrolysis at a constant potential of-2.1 V(vs.Ag AgCl)for 12 h using a tungsten wire as the working electrode and a graphite rod as the auxiliary electrode.The composition and elemental distribution of the electrolytically obtained alloys were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM)and energy spectrometry(EDS),which showed that the basal phase of the alloys was Mg_(17)Ce_(2) and the second phase was Mg_(3) Ce.

关 键 词：镁铈合金 电化学共沉积 KCl-NaCl熔盐 金属间化合物 

分 类 号：TG146.22[一般工业技术—材料科学与工程]