The chlorination of La_2O_3 by MgCl_2 in the LiCl-NaCl melts  

作　　者：王英财 李梅 韩伟 刘垚臣 刘斌 颜永得 张密林 

机构地区：[1]Key Laboratory of Superlight Materials and Surface Technology,Ministry of Education, College of Materials Science and Chemical Engineering,Harbin Engineering University

出　　处：《Nuclear Science and Techniques》2015年第1期108-112,共5页核技术（英文）

基　　金：Supported by Key Laboratory of Superlight Materials and Surface Technology,Ministry of Education;the National Natural Science foundation of China(Nos.21271054 and 21173060);the Major Research plan of the National Natural Science Foundation of China(Nos.91326113 and91226201);the Fundamental Research funds for the Central Universities(No.HEUCF201403001)

摘　　要：The chlorination of rare earth oxides by MgCl2 was investigated in the molten chlorides. To reduce the solvent salt volatility, the LiCl-NaCl mixture was selected as a solvent by comparing the mass loss of the Li ClNaCl with LiCl-KCl melts after the addition of MgCl2 in the temperature range of 873 K to 1073 K. The dissolution behavior of La2O3 was investigated in the LiCl-NaCl-MgCl2 melts by XRD measurements and ICP-AES analysis of the melts, which indicated that La2O3 was chlorinated by Mg Cl2 to produce La Cl3. The reduction peak of La(Ⅲ) in the LiCl-Na Cl-MgCl2-La2O3 melts was observed from cyclic voltammogram and square wave voltammogram. The Mg-La alloy obtained by galvanostatic electrolysis in the LiCl-NaCl-MgCl2-La2O3 melts was characterized by XRD and SEM-EDS, indicating that the Mg-La alloy consisted of Mg and La2Mg17 phases.The chlorination of rare earth oxides by MgCl2 was investigated in the molten chlorides. To reduce the solvent salt volatility, the LiCl-NaCl mixture was selected as a solvent by comparing the mass loss of the LiCl- NaCl with LiCl-KCl melts after the addition of MgCl2 in the temperature range of 873 K to 1073 K. The dissolution behavior of La203 was investigated in the LiCl-NaCl-MgCl2 melts by XRD measurements and ICP-AES analysis of the melts, which indicated that La2O3 was chlorinated by MgCl2 to produce LaCl3. The reduction peak of La（III） in the LiCl-NaCl-MgCl2-La2O3 melts was observed from cyclic voltammogram and square wave voltammogram. The Mg-La alloy obtained by galvanostatic electrolysis in the LiCl-NaCl-MgCl2- La2O3 melts was characterized by XRD and SEM-EDS, indicating that the Mg-La alloy consisted of Mg and LazMg17 phases.

关 键 词：氯化锂 氯化镁 氧化镧 氯化钠 融化 ICP-AES分析 SEM-EDS NACL 

分 类 号：TQ133.3[化学工程—无机化工]