D0I:10.13374/j.issm1001-053x.1989.06.034 第11卷第6期 北京料技大学学报 Vol.11 No.6 1989年11月 Journal of University of Science and Technology Beijing Nov,1989 Measurement and Calculation of ReCla-LiCl (Re:La,Ce)Phase Diagrams' Qiao Zhiyu（乔芝郁)，Wang Mingsheng（王明生)， Zheng Chaog4i(郑朝贵)，◆◆Duan Shuzhen(段淑贞) ABSTRACT:In this paper the phasc diagrams of LaCl3-LiCl and CeCIs-LiCl systems have been experimentally determined and theoretically calculated.Both are simple eutectic systems.The eutectic points are at 25mol%LaCls,508C and 27mol%CeCl3,494C,respectively.The optimized phase diagrams and thermodynamical data of LaCls-LiCl and CeCls-LiCl systems with self consistency are a better basis for constructing ternary phase diagrams. KEY WORDS,phase diagram,measurement and calculation,rare earth element, ReCl3-LiCl Rare earth metals play an increasing important role in various fields of contemporary science and technology.As well known,molten salt electrolysis was widely used for the production of rare earth metals and their alloys.More- over,phase diagrams are the most important data for fused electrolytes.Dealing with the binary phase diagrams involving rare earth chlorides,not a few papers have been published.However,there is still no LaCl,-Licl phase diagram available in literature.For the CeCls-LiCl phase diagram reported very recently by Chai et al.t,just shown in Fig.2,there are not enough measured liquidus data over the CeCl3-rich side. As one of the systematic studies on the measurement and calculation of phase diagrams involving rare earth chlorides,the present work was undertaken to determining the accurate liquidus of the LaCl3-LiCl and CeCl,-LiCl binary systems as well as to optimize their phase diagrams and thermodynamic data. The Project Supported by National Natural Science Fundation of China Manuscript Received April 6,1989 .Dept.of Physical Chemistry ···Dept.of Chemistry,Peking University 598第 卷第 期 年 月 北 京 科 技 大 学 李 报 一 召 。 一 夏 ’ 、 ， 一 ，，目产 夕 乔芝郁 ， 牙 夕 ， 夕 王 明 生 ，二 尸 夕 夕 郑朝 责 ，… ， “ 段 淑 贞 一 一 一 · 写 ， ， ， · 一 一 ， ， ， 一 一 犷 一 ， 。 ， 一 ， · ， 一 一 ‘ ， · ， 一 ， 一 一 丁 《， ， 二 盆 … ， 声 DOI ：10．13374／j ．issn1001－053x．1989．06．034