Degradation of electrical conductivity in lanthanum silicate oxyapatite

T. Ishiyama, H. Maruyama, H. Kishimoto, K. D. Bagarinao, T. Horita, K. Yamaji, Atsushi Yamazaki

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

    1 Citation (Scopus)

    Abstract

    Degradation of electrical conductivity in lanthanum silicate oxyapatite (La9.33+xSi6O26+1.5x) was observed at 600∼1000°C. Small particles were detected on the surface of pellets after electrical conductivity measurements for 100∼201 h. These particles were identified as La2SiO5 phase using micro-Raman spectroscopy. Lanthanum content in the oxyapatite phase is strongly related to its conductivity, because the excess oxygen is incorporated by charge compensation according to excess lanthanum composition. This study suggests that the decrease in electrical conductivity may be attributed to reduction in electrical charge carriers as a result of the phase degradation of La2SiO5 phase from oxyapatite phase.

    Original languageEnglish
    Title of host publicationSolid Oxide Fuel Cells 14, SOFC 2015
    PublisherElectrochemical Society Inc.
    Pages523-527
    Number of pages5
    Volume68
    Edition1
    ISBN (Electronic)9781607685395
    DOIs
    Publication statusPublished - 2015 Jan 1
    Event14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage - Glasgow, United Kingdom
    Duration: 2015 Jul 262015 Jul 31

    Other

    Other14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
    CountryUnited Kingdom
    CityGlasgow
    Period15/7/2615/7/31

    ASJC Scopus subject areas

    • Engineering(all)

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  • Cite this

    Ishiyama, T., Maruyama, H., Kishimoto, H., Bagarinao, K. D., Horita, T., Yamaji, K., & Yamazaki, A. (2015). Degradation of electrical conductivity in lanthanum silicate oxyapatite. In Solid Oxide Fuel Cells 14, SOFC 2015 (1 ed., Vol. 68, pp. 523-527). Electrochemical Society Inc.. https://doi.org/10.1149/06801.0523ecst