Calorimetric and thermal analysis investigations of the MF-LaF3 mixtures (M = alkali metal)

A systematic thermodynamic investigation of the LiF-LaF3, NaF-LaF3, KF-LaF3, RbF-LaF3, and CsF-LaF3 molten salt systems is reported in the present work. Enthalpy of mixing was measured by direct high temperature calorimetry at temperatures ranging 1046-1183 K. Equilibrium phase diagrams were determi...

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Bibliographic Details
Published inJournal of phase equilibria Vol. 18; no. 1; pp. 6 - 20
Main Authors ABDOUN, F, GAUNE-ESCARD, M, HATEM, G
Format Journal Article
LanguageEnglish
Published Materials Park, OH American Society for Metals 01.02.1997
Subjects
Applied sciences
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Phase diagrams of other materials
Physics
Phase diagrams
DSC
Fluorine
Mixing heat
Alkali metals
Ternary systems
Molten salts
Phase equilibria
Thermodynamic analysis
Lanthanum
Experimental study
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Summary:A systematic thermodynamic investigation of the LiF-LaF3, NaF-LaF3, KF-LaF3, RbF-LaF3, and CsF-LaF3 molten salt systems is reported in the present work. Enthalpy of mixing was measured by direct high temperature calorimetry at temperatures ranging 1046-1183 K. Equilibrium phase diagrams were determined by DSC. The same DSC technique was also used to measure the heat capacity and the enthalpies of transition and of fusion for the RbLaF4 and Cs3LaF6 stoichiometric compounds and for some NaF-LaF3 mixtures. Finally, interactions in the melts were discussed in terms of the Hoch-Arpshofen model. (Author)
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1054-9714
1544-1032
DOI:10.1007/BF02646755