The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Electrical Properties of Ultrafine $(CeO_2)_{0.9}(Gd_2O_3)_{0.1}$ Powders Prepared by Glycine Nitrate Process for the High Efficient Solid Oxide Fuel Cell Applications

  • Lee, Kang-Ryeol (Department of Ceramic Engineering, Myong Ji University) ;
  • Park, Sung (Department of Ceramic Engineering, Myong Ji University)
  • Published : 2001.03.01
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Abstract

Ultrafine $(CeO_2)_{0.9}(Gd_2O_3)_{0.1}$ solid solution powders synthesized by the glycine-nitrate process, with specific surface areas of $19-23\;\textrm{m}^2$/g were sintered at $1500^{\circ}C$ for various sintering times and then their electrical characteristics were investigated using AC impedance and four-point probe measurements. The electrical resistivity of the sintered $(CeO_2)_{0.9}(Gd_2O_3)_{0.1}$ bodies showed the minimum value at the sintering time of 10 hrs. The minimum total resistivity of the $(CeO_2)_{0.9}(Gd_2O_3)_{0.1}$ bodies sintered at $1500^{\circ}C$ for 10 hrs seems to result from the lowest activation energy for the electrical resistivity by the combination between the activation energies for the resistivities at the grain interior and grain boundary.

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