高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (7): 992.

• 研究论文 • 上一篇    下一篇

ErCl3-MCln体系相图的研究

郑朝贵, 黄受林, 王嗣强   

  1. 北京大学化学系, 北京 100871
  • 收稿日期:1992-10-05 修回日期:1993-01-30 出版日期:1993-07-24 发布日期:1993-07-24
  • 通讯作者: 郑朝贵.
  • 作者简介:第一作者:男, 53岁, 副教授.
  • 基金资助:

    国家自然科学基金

Phase Diagram of Binary Systems ErCl3-MCln (M=Li, Ca, Pb; n=1 or 2)

ZHENG Chao-Gui, HUANG Shou-Lin, WANG Si-Qiang   

  1. Department of Chemistry, Peking University, Beijing, 100871
  • Received:1992-10-05 Revised:1993-01-30 Online:1993-07-24 Published:1993-07-24

摘要: 借助于DTA与X射线衍射法研究了ErCl3-MCln(M=Li,Ca,Pb;n=1,2)二元体系相图.发现ErCl3-LiCl体系相图属固液异组成型,有一固液异组成化合物Li3ErCl6生成,且在466℃有一相转变.其无变点分别为e40.0mol(%)ErCl3(479℃)和p31.0mol(%)ErCl3(522℃);而ErCl3-CaCl2,PbCl2体系皆属简单低共熔型相图.其低共熔点e分别为:46.0mol(%)ErCl3(578℃)和38.0mol(%)ErCl3(405℃).ErCl3-PbCl2体系在固相下有一不稳定化合物PbErCl5生成,在356℃分解.同时探讨了相图的某些规律.

关键词: ErCl3, ErCl3-LiCl, ErCl3-CaCl2, ErCl3-PbCl2, 相图

Abstract: The phase diagram of binary systems ErCl3-MCln(M=Li, Ca, Pb; n=1 or 2) were investigated by means of DTAand X-ray diffraction analysis.It was found that ErCl3-LiCl system is of peritectic type with compound Li3ErCl6 and its phase transition at 466℃ as well as the invariant points e 40.0 mol(%) ErCl3(479℃) and p 31.0 mol(%) ErCl3(522℃).ErCl3-CaCl2 and ErCl3-PbCl2 systems are of the simple eutectic type with eutectic points 46.0 mol(%) ErCl3(578℃) and 38.0 mol (%) ErCl3(405℃) respectively.An unstable compound, formed in the solid state, is PbErCl5 and decomposes at 356℃.Some rules of phase diagram were explored.

Key words: ErCl3, ErCl3-LiCl, ErCl3-CaCl2, ErCl3-PbCl2, Phase diagram

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