Preparation of Non-Stoichiometric Nd<SUB>1−x</SUB>MnO<SUB>3−y</SUB> by Coprecipitation Method

  • Uehara Motoki
    National Institute for Research in Inorganic Materials
  • Nagai Takuro
    Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
  • Yamazaki Atsushi
    Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
  • Takahashi Koichiro
    National Institute for Research in Inorganic Materials
  • Tsutsumi Sadao
    Institute of Earth Science, School of Education, Waseda University

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Other Title
  • Preparation of Non-Stoichiometric Nd1−xMnO3−y by Coprecipitation Method

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Abstract

The coprecipitate of carbonates was obtained by titrating an ammonium carbonate solution into an hydrochloric solution of MnO2 and Nd2O3 . The non-stoichiometric perovskite-type oxide, Nd1−xMnO3−y was synthesized by firing the coprecipitate in air without flowing. For the products of Nd1&minusxMnO3−y prepared at 1100 °C, the single phase showing the stable y/x value 1.5 was obtained in the x = 0.05 to 0.20 region, and a by-product Mn3O4 was appeared in x = 0.25.

Journal

  • Chemistry Letters

    Chemistry Letters 28 (6), 463-464, 1999

    The Chemical Society of Japan

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