The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
권호 표지

Electrical Conduction in $SrZr_{0.95}Y_{0.05}O_{2.975}$ Ceramics

  • Baek, Hyun-Deok (Department of Materials Science and Engineering, Hong-ik University, Chochiwon) ;
  • Noh, Jin-Hyo (Department of Materials Science and Engineering, Hong-ik University Chochiwon)
  • Published : 1999.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

Partial conductivities contributed by electron holes, oxygen ions, and protons were caluclated in $SrZr_{0.95}Y_{0.05}O_{2.975}$, using the reported formulae derived from the defect chemistry of HTPCs. Required parameters were obtained from the graphical analysis of total conductivity variation against partial pressure of water vapor and oxygen. Predicted overall conductivities showed a reasonable agreement with experimental measurements. The conductivity of the material showed a linear increase with square root of the water vapor pressure. This increase was due to proton conduction in an almost pure ionic conductivity. The calculation of partial conductivities at $800^{\circ}C$ resulted in an almost pure ionic conductivity at $P_{02}=10^{-10}$ atm and a predominant hole conductivity at $P_{02}=10^{-10}$ atm. Pure proton conduction was not expected at this temperature, contrary to the earlier reports. Discussions were made in relation with reported thermodynamic data and defect structure of the material. It was shown that from the total conductivity dependence on water vapor pressure, the pure ionic conductivity at low oxygen partial pressures could be separated into protonic and oxygen ionic conductivity in $ZrO_2$-based HTPCs.

Keywords

References

  1. Solid State Ionics v.77 High-temperature Proton Conductors with Perovskite-related Structures A. S. Nowick;Yang Du
  2. Solid State Ionics v.53-56 Transport Properties and Conduction Mechanism in High-temperature Protonic Conductors N. Bonanos
  3. Solid State Ionics v.97 The equilibrium between Water Vapor, Protons, and Oxygen Vacancies in Rare earth Oxides Y. Larring;T. Norby
  4. Kor. J. Ceram. v.4 no.2 Modeling of Electrical Conductivity from $σ_{tot} vs. P_{O2}^{1/4}$ Plot in wet Atmosphere for High-temperature proton-Conducting Oxides H. D. Baek
  5. Solid State Ionics v.110 Modeling of Electrical Conductivity in High-temperature Proton-conducting Oxides H. D. Beak
  6. Solid State Ionics v.78 Theoretical Behavior of Concentration Cells Based on ABO₃ Perovskite Materials with Protonic and Oxygen ion conduction J. R. Frade
  7. proc. Symposium on Electro-ceramics and Solid-state Ionics Ionic Transport Numbers from Equilibrium Conductivities E. K. Chang;A. Mehta;D. M. Smyth;H. L. Tuller(ed.);D. M. Smyth(ed.)
  8. Solid State Ionics v.35 Ionic Conductivity of Gadollinium-doped Barium Cerate Perovskites N. Bonanos;B. Ellis;K. S. Knight;M. N. Mahmood
  9. Master's Thesis Synthesis of proton conducting $SrZr_{0.95}Y_{0.05}O_{2.975}$ Powder by Citrate Gel Method Y. S. Chun
  10. Solid State Ionics v.97 On the Development of Proton Conducting Materials for Technological Applications K. D. Kreuer
  11. Solid State Ionics v.81 In Situ Measurements of the Water Uptake in Yb doped SrCeO₃ F. Krug;T. Schober;T. Springer
  12. Solid State Ionics v.70;71 Electrical Conduction in BaThO₃ with Nd₂O₃ T. Tsuji;T. Suzuki
  13. Solid State Ionics v.79 Electrical conduction in BaThO₃ with Y₂O₃ T. Tsuji;N. Miyajima;M. Ochida
  14. Solid State Ionics v.11 Relation between Proton and hole Conduction in SrCeO₃-based Electrolytes under Water-containing Atmosphere at high Temperatures H. Uchida;N. Maeda;H. Iwahara
  15. J. Electrochem. Soc. v.142 no.5 Protonic conduction Domain of Indium-doped Calcium Zirconate N. Kurita;N. Fukatsu;K. Ito;T. Ohashi
  16. Solid State Ionics v.97 The Equilibrium between Water Vapour, Protons, and Oxygen Vacancies in Rare earth Oxides Y. Larring;T. Norby
  17. Solid State Ionics v.97 A Conductivity and Thermal Gravimetric Analysis of a Y-doped SrZrO₃ Single Crystal J. Muller;K. D. Kreuer;J. Maier;S. Matsuo;M. Ishigame
  18. Thermodynamics of solids (2nd Ed.) R. A. Swalin
  19. Solid State Ionics v.86-88 Water solubility, Proton and Oxygen Diffusion in Acceptor Doped BaCeO₃: A Single Crystal Analysis K. D. Kreuer;Th. Dippel;Yu. M. Baikov;J. Maier
  20. Solid State Ionics v.91 Defect Structure SrZrO₃ J. A. Labrincha;J. R. Frade;F. M. B. Marques
  21. Solid State Ionics v.51 Protonic Conduction in SrZrO₃-based Oxides T. Yajima;H. Suzuki;T. Yogo;H. Iwahara
  22. Solid State Ionics v.91 Protonic Conduction in Calcium, Strontium and Barium Zirconates H. Iwahara;T. Yazima;T. Hibino;K. Ozaki;H. Suzuki
  23. Solid State Ionics Oxide Ion Conduction in Ytterbium-doped Strontium Cerate N. Bonanos;B. Ellis;M. N. Mahmood
  24. Unpublished work H. D. Baek
  25. Solid State Ionics v.100 Transport Properties of $BaCe_{0.95}Y_{0.05}O_3$ Mixed Conductors for Hydrogen Separation J. Guan;S. E. Dorris;U. Balachandran;M. Liu
  26. Solid State Ionics v.59 Electrical Properties of $SrCe_{0.95}Yb_{0.05}O_3$ in Hydrogen Atmospheres I. Kosacki;J. G. M. Becht;R. van Landschoot;J. Schoonman
  27. Solid State Ionics v.47 Proton Conduction in Sintered Oxides Based on CaZrO₃ T. Yazima;H. Kazeoka;T. Yogo;H. Iwahara
  28. Solid State Ionics v.82 Investigation of Proton Conduction in Yb- and Y-doped Barium Zirconates R. C. T. Slade;S. D. Flint;N. Singh