Investigation on crystal structure and oxide ionic conduction path of LaGaO3-based oxide by in situ TOF neutron diffraction

N. Kitamura, T. Sugiyama, Y. Idemoto, T. Itoh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

We focused on La0.8Sr0.2Ga0.8Mg 0.2O3-δ (LSGM) and La0.8Sr 0.2Ga0.8Mg0.115Co0.085O 3-δ (LSGMC) with the perovskite structure as an electrolyte for solid oxide fuel cell, and investigated their crystal structures at elevated temperature by Rietveld technique using their neutron diffractions. As a result, it was indicated that the materials had a single phase of an orthorhombic structure (S. G.; Pnma) at the temperature range from 680 to 1073 K, regardless of the substituent cation species. Anisotropics of atomic displacement parameters of the oxygens, however, were supposed to be different between LSGM and LSGMC. Such a difference in the oxygen's behavior suggests different oxide-ion migration routes among the materials, and this may be one of the reasons why LSGMC shows higher oxide-ion conductivity than LSGM.

Original languageEnglish
Title of host publicationECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages1737-1743
Number of pages7
Edition2 PART 2
DOIs
Publication statusPublished - 1 Dec 2009
Event11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria
Duration: 4 Oct 20099 Oct 2009

Publication series

NameECS Transactions
Number2 PART 2
Volume25
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
CountryAustria
CityVienna
Period4/10/099/10/09

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Kitamura, N., Sugiyama, T., Idemoto, Y., & Itoh, T. (2009). Investigation on crystal structure and oxide ionic conduction path of LaGaO3-based oxide by in situ TOF neutron diffraction. In ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI) (2 PART 2 ed., pp. 1737-1743). (ECS Transactions; Vol. 25, No. 2 PART 2). https://doi.org/10.1149/1.3205713