The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Partial Conductivity of YSZ Doped with 10 mol% $TiO_2$

  • Kobayashi, Kiyoshi (Department of Material Science and Engineering, Nagoya Institute of Technology) ;
  • Kai, Yukiharu (Department of Material Science and Engineering, Nagoya Institute of Technology) ;
  • Yamaguchi, Shu (Department of Material Science and Engineering, Nagoya Institute of Technology) ;
  • Kawashima, Tsuyoshi (Fundamental Technology Research Laboratory, Tokyo Gas Co., Ltd) ;
  • Iguchi, Yoshiaki (Department of Material Science and Engineering, Nagoya Institute of Technology)
  • Published : 1998.06.01
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Abstract

Using Hebb-Wagner's asymmetric cell, partial conductivities of holes and electrons in yttria stabilized zirconia doped with 10 mol% TiO2 have been estimated by a dc polarization measurement. The current interrruption method and ac impedance measurements have been also made to evaluate the ionic conductivity and to examine the consistency of the partial conductivities. Partial conductivities of electrons(σn) and holes (σp) were found to be pro-peortional to -1/4 and 1/4 power of partial pressure of oxygen gas, respectively, except for σn at reducing conditions. In comparison with 5 mol% doped YSZ, σn was found to increase with the increase of TiO2 concentration, but σp stayed at almost a constant value.

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References

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