高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (5): 423.

• 论文 •    下一篇

NdCl3-BaCl2-NaCl三元体系相图的研究

郑朝贵, 叶于浦   

  1. 北京大学化学系
  • 收稿日期:1986-10-29 出版日期:1988-05-24 发布日期:1988-05-24
  • 通讯作者: 郑朝贵

An Investigation on the Phase Diagram of Ternary System NdCl3-BaCl2-NaCl

Zheng Chaogui, Ye Yupu   

  1. Department of Chemistry, Peking University, Beijing
  • Received:1986-10-29 Online:1988-05-24 Published:1988-05-24

摘要: 借助于DTA和X射线衍射分析方法,研究了NdCl3-BaCl2-NaCl三元体系相图,发现本体系存在对应于NdCl3、NaCl、α-BaCl2、β-BaCl2和Ba3NdCl9的5个液相面。6条二次结晶线,1个三元低共熔点E和三元转熔点P及一固相下形成的化合物。

关键词: 相图, NdCl3, NdCl3-BaCl2-NaCl三元体系

Abstract: The phase diagram of ternary system NdCl3-BaCl2-NaCl was investigated by means of DTAand X-ray diffraction analysis. It was found that there are 5 surfaces corresponding to the primary crystallization of NdCl3,α-BaCl2,β-BaCl2, NaCl and Ba3NdCl9 respectively, and 6 univariant lines related to the secondary crystallization in this system. The temperature of the ternary eutectic, composed of 74.0wt%NdCl3, 24.4wt%NaCl, 1.6wt% BaCl2, was determined to be 430℃. The temperature of the ternary peritectic, composed of 57.0wt. %NdCl3, 23.9wt% NaCl,19.1wt%BaCl2, was observed to be 508℃. Acompound, formed in the solid state, is found, and decomposed occurs at 420℃.

Key words: Phase diagram, NdCl3, Ternary system NdCl3-Bad2-NaCl

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