固相法によるTazheraniteの粉末合成と導電性 Preparation of Tazheranite Powders by Solid Phase Reaction and Conductivity of Sintered Bodies

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Abstract

rights: 社団法人日本セラミックス協会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110002290089/

Ca<sub>0.20</sub>Zr<sub>0.80-<i>x</i></sub>Ti<sub><i>x</i></sub>O<sub><i>y</i></sub> composition (<i>x</i>=0.04-0.25) powders, whose phases were the tazheranite (<i>x</i>=0.04-0.10) and the calzirtite (<i>x</i>=0.20) of single phases, were prepared at 1300°C for 10h by the solid phase reaction. The range of the tazheranite composition was broadened up to <i>x</i>=0.15 by firing them at 1500°C for 4-10h. The conductivity of the sintered bodies, fabricated at 1500°C for 4h in <i>x</i>=0.04-0.15 and 10h in <i>x</i>=0.20, was measured at 400°-900°C using the complex impedance method in the air. The activation energies of the conductivity were 120-130kJ/mol, thus it is presumed that the mechanism of electric conduction was dominated by an oxygen ion conduction in the range of these temperatures. In the case of <i>x</i>=0.04-0.15 composition samples, the resistance of grain decreased with an increase of <i>x</i>, while that of grain boundary increased. With regard to the calzirtite (<i>x</i>=0.20) composition sintered body, it is made ascertained that the specific resistance took a figure up one place. The results have suggested that the elevation of conductivity is due to the increase of dissolved TiO<sub>2</sub> amount, the valence deviation of Ti, the change of grain size and the segregation of a trace amount of calzirtite phase at the grain boundaries of the tazheranite of single phase.

Journal

  • Journal of the Ceramic Society of Japan

    Journal of the Ceramic Society of Japan 100(1165), 1135-1139, 1992

    The Ceramic Society of Japan

Codes

  • NII Article ID (NAID)
    110002290089
  • NII NACSIS-CAT ID (NCID)
    AN10040326
  • Text Lang
    UNK
  • Article Type
    journal article
  • ISSN
    0914-5400
  • NDL Article ID
    3784289
  • NDL Source Classification
    PA45(無機化学・無機化学工業--セラミックス)
  • 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.
    Z17-249
  • Data Source
    NDL  NII-ELS  IR  J-STAGE 
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