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

Abstract:

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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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Periodical:

Edited by:

Keiichi Katayama, Kazumi Kato, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki

Pages:

227-230

DOI:

10.4028/www.scientific.net/KEM.320.227

Citation:

M. Kajitani et al., "Doping Effect on Crystal Structure of Fast Oxide Ion Conductor LaGaO3-Based Perovskite Compounds", Key Engineering Materials, Vol. 320, pp. 227-230, 2006

Online since:

September 2006

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$35.00

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