Thermodynamic assessment of BaO–Ln2O3 (Ln = La, Pr, Eu, Gd, Er) systems

Weiping Gong; Yanzhi Liu; Yun Xie; Zhenting Zhao; Sergey V. Ushakov; Alexandra Navrotsky

doi:10.1111/jace.17060

Thermodynamic assessment of BaO–Ln₂O₃ (Ln = La, Pr, Eu, Gd, Er) systems

Weiping Gong, Yanzhi Liu, Yun Xie, Zhenting Zhao, Sergey V. Ushakov, Alexandra Navrotsky

Molecular Sciences, School of (SMS)

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

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.

Original language	English (US)
Pages (from-to)	3896-3904
Number of pages	9
Journal	Journal of the American Ceramic Society
Volume	103
Issue number	6
DOIs	https://doi.org/10.1111/jace.17060
State	Published - Jun 1 2020

Keywords

BaLnO
BaO–GdO
enthalpy of formation
heat capacities
phase diagram

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1111/jace.17060

Cite this

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title = "Thermodynamic assessment of BaO–Ln2O3 (Ln = La, Pr, Eu, Gd, Er) systems",

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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author = "Weiping Gong and Yanzhi Liu and Yun Xie and Zhenting Zhao and Ushakov, {Sergey V.} and Alexandra Navrotsky",

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T1 - Thermodynamic assessment of BaO–Ln2O3 (Ln = La, Pr, Eu, Gd, Er) systems

AU - Gong, Weiping

AU - Liu, Yanzhi

AU - Xie, Yun

AU - Zhao, Zhenting

AU - Ushakov, Sergey V.

AU - Navrotsky, Alexandra

PY - 2020/6/1

Y1 - 2020/6/1

N2 - 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.

AB - 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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KW - BaO–GdO

KW - enthalpy of formation

KW - heat capacities

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