Thermodynamic assessment of BaO–Ln2O3 (Ln = La,Pr, Eu,Gd, Er) systems |
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| Authors: | Weiping Gong Yanzhi Liu Yun Xie Zhenting Zhao Sergey V Ushakov Alexandra Navrotsky |
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| Affiliation: | 1. Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, Huizhou, P. R. China;2. Department of Chemical and Biomolecular Engineering, Clarkson University, Potsdam, NY, USA;3. Peter A. Rock Thermochemistry Laboratory and NEAT ORU, University of California Davis, Davis, CA, USA |
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| Abstract: | Heat capacities and enthalpies of formation of BaGd2O4 were determined by high-temperature differential scanning calorimetry and high-temperature oxide melt solution calorimetry, respectively. Thermodynamic stability of BaLn2O4 compounds increases with decreasing Ln3+ ionic radius. Previously reported data on BaNd2O4 and BaSm2O4 corroborate this trend. Missing data for compounds in BaO–Ln2O3 (Ln = La, Pr, Eu, Er) systems were estimated from established relations, thermodynamic assessment was performed, and binary phase diagrams were calculated. |
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| Keywords: | BaLn2O4 BaO–Gd2O3 enthalpy of formation heat capacities phase diagram |
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