In situ neutron diffraction study on fast oxide ion conductor LaGaO 3-based perovskite compounds

Masahiro Kajitani, Motohide Matsuda, Akinori Hoshikawa, Stefanus Harjo, Takashi Kamiyama, Toru Ishigaki, Fujio Izumi, Michihiro Miyake

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34 Citations (Scopus)

Abstract

The crystal structures of LaGaO3, LaGa0.9Mg 0.1O2.95, and La0.9Sr0.1Ga 0.9Mg0.1O2.9 have been investigated by high-temperature neutron powder diffraction in order to clarify a mechanism for high oxide ion conduction properties in LaGaO3-based compounds. Parent phase LaGaO3 crystallized in the orthorhombic (Pbnm) up to 150°C and the rhombohedral (R3c) at between 160 and 800 °C. LaGa 0.9Mg0.1O2.95 crystallized in the orthorhombic (Ibmm) up to 340°C and the rhombohedral (R3̄c) at between 350 and 800°C. On the other hand, La0.9Sr0.1Ga 0.9Mg0.1O2.9 crystallized in the monoclinic (I2/a) up to 400°C and the rhombohedral (R3̄c) at between 410 and 800°C. The correlations between the crystal structures and conduction properties of LaGaO3-based materials were discussed on the basis of the analytical results.

Original languageEnglish
Pages (from-to)4235-4243
Number of pages9
JournalChemistry of Materials
Volume17
Issue number16
DOIs
Publication statusPublished - Aug 9 2005

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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    Kajitani, M., Matsuda, M., Hoshikawa, A., Harjo, S., Kamiyama, T., Ishigaki, T., Izumi, F., & Miyake, M. (2005). In situ neutron diffraction study on fast oxide ion conductor LaGaO 3-based perovskite compounds. Chemistry of Materials, 17(16), 4235-4243. https://doi.org/10.1021/cm050597n