The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Use of High-Temperature Gas-Tight Electrochemical

  • Park, Jong-Hee (Energy Technology Division, Argonne National Laboratory, Argonne) ;
  • Beihai Ma (Energy Technology Division, Argonne National Laboratory, Argonne) ;
  • Park, Eun-Tae (Energy Technology Division, Argonne National Laboratory, Argonne)
  • Published : 1998.06.01
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Abstract

By using a gas-tight electrochemical cell, we can perform high-temperature coulometric titration and measure electronic transport properties to determine the elecronic defect structure of metal oxides. This technique reduces the time and expense required for conventional thermogravimetric measurements. The components of the gas-tight coulometric titration cell are an oxygen sensor, Pt/yttria stabilitized zirconia(YSZ)/Pt, and an encapsulated metal oxide sample. Based on cell design, both transport and thermodynamic measurements can be performed over a wide range of oxygen partial pressure ($pO_2=10^{-35}$ to 1 atm). This paper describes the high-temperature gas-tight electrochemical cells used to determine electronic defect structures and transport properties for pure and doped-oxide systems, such as YSZ, doped and pure ceria $(Ca-CeO_2 \;and\; CeO_2)$, copper oxides and copper-oxide-based ceramic superconductors, transition metal oxides, $SrFeCo_{0.5}O_x,\; and \;BaTiO_2$.

Keywords

References

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