The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Partial Conductivities, Nonstoichiometry and Defect Structure of a New Cathode Candidate $Y_{1-x}Ca_xFeO_{3-\delta}$

  • Kim, Chan-Soo (Solid State Ionics Research Laboratory, School of Materials Science and Engineering, Seoul National University) ;
  • Yoo, Han-Ill (Solid State Ionics Research Laboratory, School of Materials Science and Engineering, Seoul National University)
  • Published : 1998.06.01
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Abstract

The total electrical conductivity, ionic conductivity, and nonstoichimetry of a new cathode material $Y_{1-x}Ca_xFeO_{3-\delta}$ (x=0.1) were measured as functions of temperature ($900\leqT/^{\circ}C\leq1100$) and oxygen partial pressure $(10^{-6}\leqPo_2/atm\leq0.21$). Isothermal variations of these properties with $Po_2$ support that the majority type of ionic defects are anti-Frenkel disorder which, however, has seldom been considered for perovskite-based oxides. The results are discussed in comparison with those reported on similar oxides.

Keywords

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