化学学报 ›› 1995, Vol. 53 ›› Issue (10): 978-984. 上一篇    下一篇

研究论文

LaCl3-KCl-LiCl三元系统相图的研究

宋秀芹;郑朝贵   

  1. 北京大学化学系
  • 发布日期:1995-10-15

An investigation on the phase diagram of ternary system LaCl3-KCl-LiCl

SONG XIUQIN;ZHENG CHAOGUI   

  • Published:1995-10-15

利用DTA研究了LaCl3-KCl-LiCl三元系统相图。发现该相图由二个赝三元相图构成。相图中有五个液相面, 七条二次结晶线, 三个三元无变点, 它们分别为低共熔点E1[W(LaCl3)=0.115, W(KCl)=0.474, W(LiCl)=0.411, 345℃],E2[W(LaCl3)=0.494, W(KCl)=0.216, W(LiCl)=0.290, 410℃]和三元转熔点P[W(LaCl3)=0.600, W(KCl)=0.108, W(LiCl)=0.292, 429℃]。

关键词: 三元体系, 氯化钾, 差热分析, 相图, 氯化锂, 氯化镧

The phase diagram of ternary system LaCl3-KCl-LiCl has been investigated by means of DTA. It was found that the ternary system consist of two pseudoternary system. There are five primary crystallization surfaces, seven secondary crystallization lines, two ternary eutectic points and a ternary peritectic point in the system LaCl3-KCl-LiCl. Three reactions occurred in the system LaCl3-KCl-LiCl are: L=KCl+LiCl+K2LaCl5 E1[0.115(W/kg.kg^-^1)LaCl3, 0.474(W/kg.kg^-^1)KCl, 0.411(W/kg.kg^-^1)LiCl, 345℃] L=K2LaCl5+KLa3Cl10+LiCl E2[0.494(W/kg.kg^-^1)LaCl3, 0.216((W/kg.kg^-^1)KCl, 0.290((W/kg.kg^-^1)LiCl, 410℃] L+LaCl3=KLa3Cl10+LiCl P[0.600((W/kg.kg^-^1)LaCl3, 0.108(W/kg.kg^-^1)KCl, 0.292(W/kg.kg^-^1)LiCl, 429℃]

Key words: TERNARY SYSTEM, POTASSIUM CHLORIDE, DIFFERENTIAL THERMAL ANALYSIS, PHASE DIAGRAM, LITHIUM CHLORIDE, LANTHANUM CHLORIDE

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