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

Research output: Contribution to journalArticlepeer-review

1 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 languageEnglish (US)
Pages (from-to)3896-3904
Number of pages9
JournalJournal of the American Ceramic Society
Volume103
Issue number6
DOIs
StatePublished - Jun 1 2020
Externally publishedYes

Keywords

  • BaLnO
  • BaO–GdO
  • enthalpy of formation
  • heat capacities
  • phase diagram

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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