二重ペロブスカイト型構造を有するLa0.64(Ti0.92Nb0.08)O2.99酸化物イオン伝導体における拡散経路

八島 正知; アリ ローション; 泉 富士夫

doi:10.14853/pcersj.2007F.0.109.0

20th Fall Meeting of The Ceramic Society of Japan

Session ID : 1H05

DOI https://doi.org/10.14853/pcersj.2007F.0.109.0

Conference information

Host: The Ceramic Society of Japan

Diffusion Path of Oxide Ions in an Oxide-ion Conductor La_0.64(Ti_0.92Nb_0.08)O_2.99 with a Double Perovskite-type Structure

*Masatomo Yashima, Roushown Ali, Fujio Izumi

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Keywords: neutron diffraction, Rietveld analysis, maximum entropy method, crystal structure, ionic conductor, perovskite

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

Densities of coherent-scattering lengths derived from MEM analysis with neutron powder diffraction data reveal that oxide ions at the 4i site (P4/mmm) migrate to nearest-neighbor 4i sites along the [100] and [010] directions near the (004) planes. A two-dimensional diffusion pathways is obtained, where two-dimensionality is attributable to the layered structure of the perovskite-type La0.64(Ti0.92Nb0.08)O2.99.

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