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化学学报
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化学学报 ›› 1989, Vol. 47 ›› Issue (1): 14-18. 上一篇    下一篇

研究论文

NdCl3-LiCl及NdCl3-LiCl-NaCl体系相图的研究

张翊凤;郑朝贵;叶子浦   

  1. 东北工学院化学系;北京大学化学系
  • 发布日期:1989-01-15

An investigation on phase diagram of systems NdCl3-LiCl and NdCl3-LiCl-NaCl

ZHANG YIFENG;ZHENG CHAOGUI;YE ZIPU   

  • Published:1989-01-15

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利用DTA和X射线结构分析研究了NdCl3-LiCl二元体系相图和NdCl3-LiCl-NaCl三元体系液相限. 发现NdCl3-LiCl体系相图属于简单低共熔型, 低共熔点e3为28.5(wt%)LiCl, 452℃. 在低共熔温度以下有一固相下生成的介稳化合物, 在443℃分解, 组成为2NdCl3.LiCl. 经长时间退火, 该化合物消失. NdCl3-LiCl-NaCl体系有对应NdCl3、LiCl、NaCl、2NaCl.LiCl、NaCl.LiCl的五个液相面, 七条两次结晶线, 一个三元低共熔点E[69.0(wt%)NdCl3, 13.5(wt%)NaCl, 374℃], 两个三元转熔点P1[69.5(wt%)NdCl3, 14.5(wt%)NaCl, 380℃], P2[70.0(wt%)NdCl3,15.5(wt%)NaCl, 385℃].

关键词: 二元体系, 氯化物, Ｘ射线衍射分析, 三元体系, 锂化合物, 氯化钠, 差热分析, 熔盐, 氯化钕, 相图

DTA and x-ray anal. methods were used to study the title systems. Phase diagrams are constructed. The NaCl3-LiCl system is eutectic, with eutectic point at 28.5 wt.% LiCl and 452? A metastable compound, LiNd2Cl4, is formed on the solid state and decomps. >443? In the ternary system NdCl3-LiCl-NaCl, the eutectic composition is 69.0 (wt.%) NdCl3, 13.5 NaCl, at 374? Two ternary peritectics are observed, at 380 and 385? resp., containing (wt.%) 69.5 and 70.0 NdCl3 and 14.5 and 15.5 NaCl, resp.

Key words: BINARY SYSTEM, CHLORIDE, X-RAY DIFFRACTION ANALYSIS, TERNARY SYSTEM, LITHIUM COMPOUNDS, SODIUM CHLORIDE, DIFFERENTIAL THERMAL ANALYSIS, FUSED SALTS, NEODYMIUM CHLORINE, PHASE DIAGRAM

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