高等学校化学学报

高等学校化学学报 ›› 1983, Vol. 4 ›› Issue (4): 395.

• 论文 •    下一篇

NaCl-CaCl2-SrCl2三元相图的测定

莫雯静, 武世民, 乔芝郁, 朱元凯   

  1. 北京钢铁学院物理化学系
  • 收稿日期:1981-09-26 出版日期:1983-08-24 发布日期:1983-08-24

MEASUREMENT OF THE PHASE DIAGRAM OF MOLTEN SALT SYSTEM NaCl-CaCl2-SrCl2

Mo Wenjing, Wu Shimin, Qiao Zhiyu, Zhu Yuankai   

  1. Dept. of Physical Chemistry, Beijing University of Iron andSteel Technology, Beijing
  • Received:1981-09-26 Online:1983-08-24 Published:1983-08-24

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摘要： 本文以NaCl-CaCl2-SrCl2三元计算相图作为“预知图形”,采用高灵敏度的微型差热分析仪,测定该三元相图是三元低共晶体系,其低共晶点E的组成(百分摩尔)为NaCl41.9％,CaCl240.0％,SrCl218.1％,温度为744K。

Abstract: In this paper, the phase diagram of molten salt system NaCl-CaCl2-SrCl2 has been determined by MDTA with high sensitivity, using the calculated phase diagram as a prior one. Especially, it is considered that supercooling of salts affects the accuracy of measurement.This ternary system contains an eutectic point at 41.9 mol% NaCl,40.0 mol%CaCl2, 18.1 mol%SrCl2, 744K. In the liquidus surface for saturation with the CaCl2-SrCl2 solid solution unvariant line starts at 823K, and the liquid composition is 24.8 mol%NaCl, 50.1 mol%CaCl2,25.1 mol%SrCl2.This phase diagram is important for the practice of sodium electrolysis. It may furnish an example in judging the reliability of a thermody-namic model that has been applied for calculation of the phase diagrams of charge-asymmetric ternary molten salt systems.

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