Higherature protonic conduction in LaBO3 substituted with alkaline earth elements

Naoto Kitamura, Koji Amezawa, Nobuyuki Takahashi, Jun Ichi Yamada, Teiichi Hanada, Naoya Ishida, Yasushi Idemoto

    研究成果: Article査読

    2 被引用数 (Scopus)


    Electrical conduction properties of the aragonite-type LaBO3-based materials, in which La was substituted partially by Ca, Sr and Ba, were investigated at 500925°C with conductivity and transport-number measurements. From X-ray diffraction measurements, it was confirmed that a solubility limit of Sr to the La site is between 1 and 2 mol%. When the substitution content exceeded the solubility limit, the conductivities decreased with increasing the concentration. Such a deterioration in the conductivity was considered to be resulted from an impurity-phase formation. Regardless of substitution species, the LaBO3 exhibited predominant protonic conduction by the partial substitution of the alkaline earth elements for La, and the Sr-substituted sample showed the highest conductivities. The proton transport numbers were estimated as 0.70.9 from electromotive forces of watervapor and oxygen concentration cells.

    ジャーナルJournal of the Ceramic Society of Japan
    出版ステータスPublished - 2015 4月 1

    ASJC Scopus subject areas

    • セラミックおよび複合材料
    • 化学 (全般)
    • 凝縮系物理学
    • 材料化学


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