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Lanthanide halide with an alkali metal halide mixture thermodynamics of phase diagram of the system

Author: WuYue
Tutor: GongWeiPing
School: Central South University
Course: Materials Science
Keywords: Lanthanide halide with an alkali metal halide mixture system Thermodynamic Optimization Phase diagram
CLC: O613.4
Type: Master's thesis
Year: 2011
Downloads: 37
Quote: 1
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Abstract


In this paper describes the measurement of lanthanide metal halide with a mixture of alkali metal halide system phase diagram and thermodynamic data of the experimental process . CAPHLD calculated and assessed by the MBr-TbBr3 (M = Cs, Rb), MBr-CeBr3 (M = Na, Li, K, Rb, Cs) and CsBr-LaBr3 other molten salts . During the evaluation process , according to each system phase diagram and thermodynamic properties and taking into account the characteristics of the enthalpy of mixing in the liquid phase and the liquid phase of the actual existence of ionic groups , proper selection of a dual -sublattice ionic solution model , (M) P : (Br-, TbBr63-, TbBr3) Q, (M = alkali metal element , Ln = lanthanide ) describes a liquid phase and the intermediate phase MxLnyBrz (M = alkali metal , Ln = lanthanides ) . In the assessment , liquid mixing enthalpy , specific heat capacity of the intermediate phase and the transition enthalpy , and phase diagram data are used to calculate them . Finally, to obtain the phase diagram of the assessment and the Gibbs free energy of each phase . For the first time established a system in which a plurality of thermodynamic databases. By comparing the calculated thermodynamic data , phase diagram data with the experimental data and found them in good and explores the atomic radius of the alkali metal elements and lanthanides thermodynamic properties of atomic number and see the relationships and variation . The resulting thermodynamic database and the variation of thermodynamic properties of molten metal will react and metal halide lamps on the application of theoretical guidance role to play .

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CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Non-metallic elements and their compounds > The Ⅶ family of non-metallic elements ( halogens) and its compounds
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