Doping Effect on Crystal Structure of Fast Oxide Ion Conductor LaGaO3-Based Perovskite Compounds

Masahiro Kajitani; Motohide Matsuda; Akinori Hoshikawa; Takashi Kamiyama; Fujio Izumi; Michihiro Miyake

doi:10.4028/www.scientific.net/KEM.320.227

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Doping Effect on Crystal Structure of Fast Oxide Ion Conductor LaGaO₃-Based Perovskite Compounds

Abstract:

Doping effects of Sr and/or Mg on the crystal structures of LaGaO3 perovskites were investigated. The doping with Mg into Ga-site in LaGaO3 led to structural change from the orthorhombic primitive lattice (Pbnm) to the orthorhombic body-centered lattice (Ibmm) at room temperature. The orthorhombic cell (Ibmm) of LaGa0.9Mg0.1O2.95 changed to the monoclinic (I2/a) by doping with Sr into La site. Neutron powder diffraction analyses revealed that these compounds had GaO6 octahedral tilt. The GaO6 octahedral tilt angles were reduced with doping with Sr and/or Mg.

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Key Engineering Materials (Volume 320)

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227-230

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.320.227

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Online since:

September 2006

Authors:

Masahiro Kajitani, Motohide Matsuda, Akinori Hoshikawa, Takashi Kamiyama, Fujio Izumi, Michihiro Miyake

Keywords:

Doping Effect, Lanthanum Gallate, Neutron Diffraction, Oxide Ion Conductors, Perovskite

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