KF—LiCl—SrCl2系相图研究

本文研究了KF-LiCl-SrCl_2相图,并对溶解能参数f(r)和相图中初晶化合物的面积的函数关系作了描述。     

SmCl3—PbCl2和SmCl3—PbCl2—CaCl2系相图的研究

利用DTA和X射线衍射技术研究了SmCl_3-PbCl_2二元系和SmCl_3-PbCl_2-CaCl_2三元系相图。发现SmCl_3-PbCl_2系有一个异份熔化化合物3SmCl_3 PbCl_2,体系转熔点p为465℃,42.0mol-%SmCl_3,低共熔点e是452℃,33.0mol-%SmCl_3,SmCl_3-PbCl_2-CaCl_2三元系有对应SmCl_3,PbCl_2,CaCl_2,和3SmCl_3·PbCl_2四个液相面,五条二次结晶线,一个三元低共熔点E[396℃,29.5mol-%SmCl_3,58.0mol-%PbCl_2],一个三元转熔点P[417℃,36.0mol-%SmCl_3,50.0mol-%PbCl_2),对应的两个四相平衡反应为: L=PbCl_2+CaCl_2+3SmCl_3·PbCl_2 L+SmCl_3=3SmCl_3·PbCl_2+CaCl_2     

KF—LiCl—CaCl2系相图研究

用目测变温法，差热分析法及Ｘ射线粉末法测定了ＫＦ－ＬｉＣｌ－ＣａＣｌ２系熔盐相图，发现ＫＦ在ＬｉＣｌ－ＣａＣｌ２熔盐溶液中呈负偏差，并对ＫＦ－ＬｉＣｌ－ＣａＣｌ２系相图和已经研究的ＫＦ－ＬｉＣｌ－ＢａＣｌ２及ＫＦ－ＬｉＣｌ－ＣｒＣｌ２系相图进行了讨论，发现碱土金属氟化物的初晶面积和溶解能参数之间存在一定的关系。     

EuCl3—CaCl2二元系相图

用差热分析法研究了ＥｕＣｌ３ＣａＣｌ２二元体系相图，发现该体系有一个异份熔化化合物ＥｕＣｌ３·３ＣａＣｌ２。体系转熔点为５７０℃，ＥｕＣｌ３摩尔分数４５．４％；低共熔点为５２２℃，ＥｕＣｌ３摩尔分数６６．８％。     

PrCl3—CaCl2—MgCl2三元体系相图的研究

本文借助于DTA研究了PrCl_3-CaCl_2-MgCl_2三元体系相图发现:本体系属简单低共熔型相图。体系内有对应于PrCl_3,CaCl_2和MgCl_2的三个液相面,三条二次结晶线和一个三元低共熔点E(44.8wt-％PrCl_3,31.8wt-％CaCl_2,546℃)。     

KPO3—MoO3熔盐相图

用目测变温法及差热分析法测定了KPO3－MoO3体系熔盐相图，发现该体系生成两个化合物，它们的化学计量式分别为3KPO3·MoO3和KPO3·MoO3，经X射线衍射及Raman光谱分析得到进一步证实。     

EuCl3-KCl二元系相图

利用差热分析法研究了EuCl3 KCl二元系相图 ,发现该体系有两个固液同组成化合物EuCl3 ·3KCl和2EuCl3 ·KCl,体系相变点分别为 76 5℃ ,EuCl3 2 5 %(摩尔分数 )和 5 5 5℃ ,EuCl3 6 6 .7%(摩尔分数 ) ;一个异分熔化化合物EuCl3 ·2KCl,转熔点为 5 6 4℃ ,EuCl3 42 %(摩尔分数 ) ;3个低共熔点分别为 6 5 0℃ ,EuCl3 12 %(摩尔分数 ) ,5 0 0℃ ,EuCl3 5 5 %(摩尔分数 )和 490℃ ,EuCl3 85 %(摩尔分数 )。同时探讨了相图的某些规律。     

RECl3—CaCl2—MgCl（RE：La,Ce,Pr和Nd）三无相图

优化评估了ＲＥＣｌ３－ＣａＣｌ２（ＥＥ：Ｌａ、Ｃｅ、Ｐｒ和Ｎｄ），ＲＥＣｌ３－ＭｇＣｌ２和ＣａＣｌ２－ＭｇＣｌ２九个侧边二元系相图和热力学性质，运用Ｈｉｌｌｅｒｔ不对称模型，以ＭｇＣｌ为不对称组元计算了ＲＥＣｌ３－ＣｇＣｌ２－ＭｇＣｌ２系列三元系相图，并简要讨论了不对称组元的选取原则。     

SmCl_3-CaCl_2及SmCl_3-LiCl体系相图的研究

用DTA和X射线衍射方法研究了 SmCl_3-CaCl_2及SmCl_3-LiCl二元体系相图.发现前者属于简单低共熔型,低共熔点e_1为55.8mol%SmCl_3,545℃;后者属于有化合物分解的相图类型,该异分熔点化合物为Sm_2LiCl_7,分解温度434℃,转熔点p组成为39.0mol％SmCl_3.低共熔点e_2为31.5mol％SmCl_3,395℃。     

MoO3—MoO2—H2O—H2系平衡及400—700℃Mo—O系相图

使用自行设计的受控气氛热重装置研究了ＭｏＯ３－ＭｏＯ２－Ｈ２Ｏ－Ｈ２系平衡，在ＰＨ２Ｏ／ＰＨ２从０．４１２至０．６０９，温度从４００至５３４℃范围内直接测定了反应：ＭｏＯ３＋Ｈ２＝ＭｏＯ２＋Ｈ２Ｏ（ｇ）的平衡常数与温度间的关系为１ｇＫｐ＝０．７０２－７３９．８／Ｔ。获得２９８．１５Ｋ下ＭｏＯ３标准生成焓及绝对熵分别为：－８４５．７５ｋＪ·ｍｏｌｅ＾－１及７８．１６Ｊ·Ｋ＾－１·ｍｏｌｅ＾－１．实验     

PHASE DIAGRAM OF PrCl_3-SrCl_2-CaCl_2 SYSTEM

Five fields corresponding to the primary crystallization of PrCl_3,Sr_3PrCl_9,α(SrCl_2,CaCl_2),α_1(CaCl_2,SrCl_2)and α_2(SrCl_2,CaCl_2)respectively,six univariant lines relatedto the secondary crystallization,one ternary eutectic(48.0 wt-％ PrCl_3,23.5 wt-％ SrCl_2;590℃)and ternary peritectic point(45.5 wt-％ PrCl_3,24.5 wt-％ SrCl_2;614℃)were determined by DTA.Attempts were also made to explore the rule governing thealteration in the phase diagram containing rare earth chloride,formation of compoundand its stability by means of polarization and counter-polarization.     

PHASE DIAGRAM OF TERNARY SYSTEM PrCl_2-CaCl_2-MgCl_2

Three surfaces corresponding to the primary crystallization of PrCl_3,CaCl_2 andMgCl_2 respectively,3 univariant curves related to the secondary crystallization and a ternaryeutectic(44.8 wt-% PrCl_3,31.8 wt-% CaCl_2,546℃)were found in systemPrCl_3-CaCl_2-MgCl_2 by means of DTA.A reaction occurs in this system:L=PrCl_3+CaCl_2+MgCl_2.     

DETERMINATION OF PrCl_3-NaCl-LiCl PHASE DIAGRAM

PrCl_3-NaCl-LiCl phase diagram has been constructed from the phase diagrams of itssub-binary systems and of six quasi-binary systems measured by DTA technique.It is foundthat this ternary system is composed of five liquidus surfaces,seven second crystallizationlines,two peritectic points and one eutectie point.The temperatures and compositions ofinvariant points are as follows:P_1(416℃,30.3 mol% NaCl,44.2 mol% LiCl,25.5 mol%PrCl_3);P_2(409℃,25.0 mol% NaCl,50.0 mol% LiCl,25.0 mol% PrCl_3);E(404℃,20.0mol% NaCl,55.4 mol% LiCl,24.6 mol% PrCl_3).     

DETERMINATION OF PrCl_3-NaCl-LiCl PHASE DIAGRAM

本文用差热分析法重新测定了组成PrCl_3-NaCl-LiCl三元系的三个侧边二元系相图,测定了该三元系中6个不同组成的变温截面,从而构筑了PrCl_3-NaCl-LiCl三元相图。该三元系由分别对应于PrCl_3,NaCl,2NaCl·LiCl,NaCl·LiCl和LiCl的5个液相面,7条二次结晶线,两个转熔点和一个共晶点构成。转熔点和共晶点的温度和组成分别为:P_1(416℃,30.3mol％NaCl,44.2mol％LiCl,25.5mol％PrCl_3);P_2(409℃,25.0mol％NaCl,50.0mol％LiCl,25.0mol％PrCl_3);E(404℃,20.0mol％NaCl,55.4mol％LiCl,24.6mol％PrCl_3)。二元和三元相图液相限的测量误差约为±5℃和±7℃。     

CALCULATION OF NaCl-BaCl_2-SrCl_2 PHASE DIAGRAM

The mathematical formulas are given for calculating the partial molar thermodynamic proper-ties in a ternary system from its three corresponding binary systems based on the new ternarysymmetric model presented by the authors in the foregoing paper.Applying this model toNaCl-BaCl_2-SrCl_2 system,the phase diagram of which as well as some isothermal sectionshave been calculated.The devations of temperature between the calculated and experimen-tal diagrams are less than five degrees.     

PHASE DIAGRAMS OF SYSTEMS SmCl_3-CaCl_2 AND SmCl_3-LiCl

The phase diagrams of binary systems SmCl_3-CaCl_2 and SmCl_3-LiCl were determined byDTA and X-ray diffraction analysis.The system SmCl_3-CaCl_2 is of a simple eutectic typewith eutectic point of 55.8mol-% SmCl_3 at 545℃.The system SmCl_3-LiCl is of the typewith incongruent melting phase 2SmCl_3·LiCl at peritectic point 434℃ and with eutecticpoint of 31.5 mol-% SmCl_3 at 395℃.     

Bi-Pb-Tl三元系相图

用室温、高温X射线衍射及淬火的方法,测定了Bi-Pb-Tl三元系25℃的等温截面及该体系中的相结构。     

PHASE DIAGRAM OF Bi-Pb-T1 TERNARY SYSTEM

Isothermal section at 25℃ of phase diagram and phase structure of Bi-Pb-Tl ternary systemhave been studied by means of room and high temperature X-ray diffraction and quenching.