Experimental Study and Thermodynamic Calculation of BaO-Lu2O3 Binary System

Xin Yu Ye; Qin Li; Yang Luo; Di Wu

doi:10.4028/www.scientific.net/MSF.852.443

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HomeMaterials Science ForumMaterials Science Forum Vol. 852Experimental Study and Thermodynamic Calculation...

Experimental Study and Thermodynamic Calculation of BaO-Lu₂O₃Binary System

Abstract:

Only one intermediate compound Ba₃Lu₄O₉was identified at 1373, 1573 and 1773K in the BaO-Lu₂O₃system in present work.Based on the available experimental phase diagram and relevant thermodynamic data, BaO-Lu₂O₃ binary system was optimized and calculated by using CALPHAD method. The Gibbs free energy of high temperature solution was described by an ionic two-sublattice model as (Ba²⁺,Lu³⁺)_P(O^2-)_Q. The calculated phase diagram, Gibbs energy of intermediate phase Ba₃Lu₄O₉and Gibbs energy of mixingagreewell with experimental resultswithin error limits. The study will offer theoretical basis for further research of the phosphor matrix system of BaO-Lu₂O₃-SiO₂, but also provide new idea for the phase diagram and thermodynamic research on related metallurgical slags, refractories, high-temperature superconductivity material systems.

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Materials Science Forum (Volume 852)

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443-448

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https://doi.org/10.4028/www.scientific.net/MSF.852.443

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Online since:

April 2016

Authors:

Xin Yu Ye, Qin Li, Yang Luo, Di Wu

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BaO-Lu₂O₃ Binary System, CALPHAD, Ionic Two-Sublattice Model, Thermodynamics

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