Articles
  • Electrical properties of sintered bodies composed of monophase cubic spinel structure Mn(1.5-0.5x)Co(1+0.5x)Ni0.5O4(0≤X≤1) 
  • Yoshiaki Abea, Takeshi Meguro*, Takashi Yokoyamab, Takaaki Morita, Junichi Tatami and Katsutoshi Komeya
  • Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan a Technol Seven Co., Ltd., 1-3-13 Kamoi, Midori-ku, Yokohama 226-0003, Japan b Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
Abstract
The relationship between the cation distributions and electrical properties of sintered bodies composed of monophase spineltype oxides expressed by Mn(1.5-0.5X)Co(1+0.5X)Ni0.5O4 (0.00≤X≤1.00) was investigated. In particular, Nv/n (Nv is state density, n is carrier concentration) calculated from the Seebeck coefficient and c/(1-c) (c is fraction of available sites) derived from the estimated cation distribution were compared. The composition dependences of Nv/n and c/(1-c) were found to have almost the same tendency. As a result, the estimation of the cation distributions was considered to be valid.

Keywords: Mn-Co-Ni spinel-type oxide, Electrical conductivity, Cation distribution, Seebeck coefficient, Thermistor

This Article

  • 2003; 4(3): 140-144

    Published on Sep 30, 2003

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