Solid solutions of perovskite in the LaO 1.5 -BaO-ScO 1.5 -ZrO 2 system at 1600°C

Koichi Suehiro, Susumu Imashuku, Tetsuya Uda, Yoshitaro Nose, Yasuhiro Awakura

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1 Citation (Scopus)

Abstract

A partial pseudoternary phase diagram of the LaO 1.5 -BaO-ScO 1.5 system was established at 1600°C. According to the phase diagram, the solubility of barium into the cubic perovskite phase (LaScO 3 ) at 1600°C is 0.24 in a mole fraction of barium oxide (X BaO ) on the composition line where the mole fraction of scandium oxide is 0.50. Another cubic perovskite phase (BaZrO 3 ) in the BaO-ZrO 2 -ScO 1.5 system is also known. We investigated the phase relationships between the two cubic perovskites in the pseudoquaternary phase diagram of the LaO 1.5 -BaO-ScO 1.5 -ZrO 2 system. As a result, we found the existence of a wide solid solution region between the cubic perovskites at 1600°C. The region was determined by X-ray diffraction (XRD) analysis and energy dispersive X-ray (EDX) microanalysis of samples with various compositions, and established the partial pseudoquaternary phase diagram.

Original languageEnglish
Pages (from-to)2572-2579
Number of pages8
JournalJournal of Solid State Chemistry
Volume181
Issue number10
DOIs
Publication statusPublished - 2008 Jan 1
Externally publishedYes

Keywords

  • Fuel cell
  • Phase diagram
  • Solubility
  • Thermodynamics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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