Degradation of electrical conductivity in lanthanum silicate oxyapatite

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

    研究成果: Conference contribution

    1 被引用数 (Scopus)

    抄録

    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.

    本文言語English
    ホスト出版物のタイトルSolid Oxide Fuel Cells 14, SOFC 2015
    出版社Electrochemical Society Inc.
    ページ523-527
    ページ数5
    68
    1
    ISBN(電子版)9781607685395
    DOI
    出版ステータスPublished - 2015 1 1
    イベント14th 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
    継続期間: 2015 7 262015 7 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
    国/地域United Kingdom
    CityGlasgow
    Period15/7/2615/7/31

    ASJC Scopus subject areas

    • 工学(全般)

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