The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Oxygen Permeability Measurement of $ZrO_2-TiO_2-YB_2O_3$ Mixed Conductor

  • Hitoshi Naito (Space Project and Research Center, National Aerospace Laboratory) ;
  • Kim, Hitoshi ishima (Graduate School of Engineering, Tohoku University) ;
  • Toru Takahashi (Graduate School of Engineering, Tohoku University) ;
  • Hiroo Yugami (Graduate School of Engineering, Tohoku University)
  • Published : 2000.06.01
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Abstract

Electrical properties of $ZrO_2-TiO_2Yb_2O_3$mixed conductor (Ti-YbSZ) were investigated. This mixed conductor can be applied as a membrane for gas separation at high temperatures. The total conductivity decreased with increasing the $TiO_2$concentration. At high temperatures, the rate of the conductivity degradation became smaller than that at low temperatures. From the oxygen partial pressure dependence of the total conductivity of Ti-YbSZ, the electronic conductivity increased with increasing $TiO_2$concentration at low oxygen partial pressures and at high temperatures. Both 15 and 20 mol% $TiO_2$doped YbSZ showed high oxygen permeability. Mixed conductors, which has high $TiO_2$concentration in YbSZ, are promising materials for using as a membrane for gas separation at high temperatures.

Keywords

References

  1. Science and Technology of Zirconia v.24 Advances in Ceramics H.Iwahara;T.Esaka;K.Takeda
  2. High Temp.High Press v.14 Production of Hydrogen by Direct Thermal Decomposition of Water with the Aid of a Semipermeable Membrane B.Cales and J.F.Baumard
  3. Science v.197 Hydrogen and Oxygen from Water E.A.Fletcher;R.L.Moen
  4. Energy v.13 A Study of the Use of Y₂O₃Doped ZrO₂ Membrane for Solar Electrothermal and Solar Thernal Separations D.J.Parks;K.L.Scholl;E.A.Fletcher
  5. Proc.of 1st Int.Symp.on Solid Oxide Fuel Cells Mixed-Conducting Oxide Electrodes for Solid Oxide Fuel Cells S.S.Liou;W.L.Worrell
  6. Denki Kagaku v.58 Effects of TiO₂Addition on Electrical Properties of Yttria-Stabilized Zirconia N.Matui
  7. Electrical Properties of ZrO₂-TiO₂-Y₂O₃System,Solid State Ionics v.53-56 H.Naito;H.Arashi
  8. Soild State Ionics v.79 Hydrogen Production from Direct Water Splitting at High Temperatures Using a ZrO₂-TiO₂-Y₂O₃Membrane H.Naito;H.Arashi
  9. JANAF Thermo-chemical Tables,3rd Ed. M.W.Chase;C.A.Davies;J.R.Downey;D.J.Frurip;R.A.McDonald;A.N.Syverud(eds.)
  10. Jpn.J.Appl.Phys. v.33 Electronic Transport Properties of ZrTiO₄at High Temperature S.Yamaguchi;K.Kobayashi;Y.Iguchi;N.Yamada;T.Kato
  11. Solid State Phys. v.3 Relations between the Concentrations of Imperfections in Crystalline Solids F.A.Kroger;H.J.Vink
  12. Sensors and Actuators B v.4 Mixed Oxides for Low-Temperature Oxygen Sensors;Phase Charcterization,Spectroscopic and Electrical Investigations of Titania-Doped Yttria-Stabilized Zirconia U.Vohrer;H.-D.Wiemhofer;W.Gopel
  13. Solid State Ionics v.53-56 Oxygen Permeability in ZrO₂-TiO₂-Y₂O₃System H.Arashi;H.Naito
  14. Solid Electrolytes,Topics in Applied Physics v.21 L.Heyne
  15. Metal-lurgical Transactions B v.9B Oxygen Permeability of Calcia-Stabilized Zirconia at Low Oxygen Partial Pressures M.Iwase;T.Mori