Relationship between anion and cation nonstoichiometries and valence state of titanium in perovskite-type oxynitrides LaTiO_2N

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Author(s)

    • Mashima Ryota MASHIMA Ryota
    • Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima
    • Yamada Mayu [他] YAMADA Mayu
    • Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima
    • IKEUCHI Kaoru
    • Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima
    • MURAI Kei-ichiro
    • Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima
    • MORIGA Toshihiro
    • Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima

Abstract

Three series of (La,Sr)TiO<sub>2</sub>N compounds, with either anion nonstoichiometry LaTiO<sub>2+<i>x</i></sub>N<sub>1-<i>x</i></sub>, cation nonstoichiometry La<sub>1-<i>x</i></sub> Ti<sub>1+<i>x</i></sub>O<sub>2</sub>N or an La<sub>1-<i>x</i></sub>Sr<sub><i>x</i></sub>TiO<sub>2</sub>N series, have been prepared in order to clarify, by XPS spectroscopy, the influence of composition on the valence state of titanium. Though the substitution of lanthanum by strontium was effective in the enhancement of reflectivity in the longer wavelength region above the absorption edge, the valence state of titanium did not change in either the La<sub>1-<i>x</i></sub>Ti<sub>1+<i>x</i></sub>O<sub>2</sub>N or the La<sub>1-<i>x</i></sub>Sr<sub><i>x</i></sub>TiO<sub>2</sub>N series. However, it was found that the increase of oxygen content in the LaTiO<sub>2+<i>x</i></sub>N<sub>1-<i>x</i></sub> series causes oxidation of the titanium.

Journal

  • Journal of the Ceramic Society of Japan

    Journal of the Ceramic Society of Japan 117(1361), 76-81, 2009-01-01

    The Ceramic Society of Japan

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Codes

  • NII Article ID (NAID)
    110007026744
  • NII NACSIS-CAT ID (NCID)
    AA12229489
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    18820743
  • NDL Article ID
    9751741
  • NDL Source Classification
    ZP9(科学技術--化学・化学工業--無機化学・無機化学工業--セラミックス・窯業)
  • NDL Call No.
    Z78-A504
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE 
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