The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Non-Steady State Gas Permeation Measurements of $TiO_2$-Doped YSZ

  • Kobayashi, Kiyoshi (Department of Inorganic Materials, National Institute of Materials and Chemical Research) ;
  • Yamaguchi, Shu (Department of Materials Science and Engineering, Nagoya Institute of Technology Gokiso-cHo) ;
  • Iguchi, Yoshiaki (Department of Materials Science and Engineering, Nagoya Institute of Technology Gokiso-cHo)
  • Published : 2000.06.01
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Abstract

Mobilities of electrons ($\mu_p$) and holes ($\mu_p$) in 2, 5, and 10 mol% $TiO_2$-doped yttria stabilized zirconia (TD-YSZ) have been estimated by a non-steady state gas permeation method using models proposed by Weppner and Maruyama. Values of $\mu_n$ and $\mu_p$ were found to be closed to those in non-doped YSZ reported earlier. The concentration of electrons and holes were calculated from $\mu_n$ and $\mu_p$ values and the partial conductivities of electrons and holes measured by a dc-polarization method. The concentration of electrons at unit oxygen partial pressure increased with increasing $TiO_2$concentration, while the hole concentration was almost independent of $TiO_2$concentration.

Keywords

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