NdCl_3-BaCl_2-LiCl三元体系相图的研究  

An Investigation on Phase Diagram of Ternary System NdCl_3-BaCl_2-LiCl

作　　者：郑朝贵[1] 靳军[1] 叶于浦[1] 

机构地区：[1]北京大学化学系

出　　处：《化学学报》1989年第7期678-682,共5页Acta Chimica Sinica

摘　　要：研究熔盐体系的各种物理化学性质及电解制备金属，相图是非常必要的。由于稀土元素，分离提纯及实验时测定相图的困难，至今只能见到某些稀土氯化物的二元相图，而含稀土的三元氯化物体系相图的报道甚少。NdCl20-BaCl2-LiCl三元体系相图尚未见到文献报道。本文测定了该三元体系的相图。The phase diagram of ternary system NdCl_3-BaCl_2-LiCl has been investigated by means of DTA and X-ray diffraction analysis. It was found that there are 5 surfaces corresponding to the primary crystallization of NdCl_3, α-BaCl_2, β-BaCl_2, LiCl and Ba_3NdCl_9 respeotively, and 6 univariant lines related to the secondary crystallization in this system. The two reactions occured in this system are: L+β-BaCl_2 = Ba_3NdCl_9+LiCl P[54.5 (wt%) NdCl_3, 20.0 (wt%) BaCl_2, 25.5 (wt%) LiCl; 485°C] L=Ba_3NdCl_9+LiCl+NdCl_3 E[68.5 (wt%) NdCL_3, 2.2 (wt%) BaCl_2, 29.3 (wt%) LiCl; 438°C] A compound, formed in the solid state, was found. The temperature of decomposition occures at 427°C.

关 键 词：氯化钕 氯化锂 三元相图 熔盐体会 氯化钡 

分 类 号：O642.42[理学—物理化学]