Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Phase Formation and Protoniz Conduction of La(Ba)$ScO_3$ Perovskites

La(Ba)$ScO_3$계 Perovskite의 생성상 및 Proton 전도

  • Lee, Kyu-Hyoung (Department of Ceramic Engineering, Yongsei University) ;
  • Kim, Hyu-Lim (Department of Ceramic Engineering, Yongsei University) ;
  • Kim, Shin (Engineering Research Institute, Yonsei University) ;
  • Lee, Hyung-Jik (Department of Ceramic Engineering, Kangnung University) ;
  • Lee, Hong-Lim (Department of Ceramic Engineering, Yongsei University)
  • 이규형 (연세대학교 세라믹공학과) ;
  • 김혜림 (연세대학교 세라믹공학과) ;
  • 김신 (연세대학교 산업기술연구소) ;
  • 이형직 (강릉대학교 세라믹공학과) ;
  • 이홍림 (연세대학교 세라믹공학과)
  • Published : 2001.11.01
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Abstract

Phase formation and proton conduction in BaO doped LaSc $O_3$with perovskite structure were studied. L $a_{0.6}$B $a_{0.4}$Sc $O_{2.8}$, viz. 40at% $Ba^{2+}$ ion doped composition, showed a single cubic phase, while the other compositions doped less than 30 at% $Ba^{2+}$ ion showed the cubic phase and the orthorhombic one. Above $650^{\circ}C$ oxygen ion conduction was dominant in $N_2$atmosphere and below this temperature proton conduction was observed in wet atmosphere. All compositions were found to be the pure proton conductors below 30$0^{\circ}C$. The proton conductivity (bulk) of L $a_{0.6}$B $a_{0.4}$Sc $O_{2.8}$ was higher than those of any other composition.osition.ion.

Bao를 첨가한 perovskite 구조 LaSc $O_3$의 생성상과 proton 전도에 대해 연구하였다. La자리에 $Ba^{2+}$를 40 at% 첨가한 조성에서는 입방정 단일상이 생성된 반면, $Ba^{2+}$를 30 at% 이하로 첨가한 조성은 입방정과 사방정이 생성되었다. $N_2$분위기에서 $650^{\circ}C$ 이상의 온도에서는 주로 산소이온에 의한 전도를 나타내었고, 그 이하의 온도에서는 wet 분위기에서 proton 전도가 관찰되었다. 모든 조성의 물질은 30$0^{\circ}C$ 이하에서는 순수한 proton 전도체의 거동을 보였으며, proton에 의한 bulk(grain)의 전도도는 L $a_{0.6}$B $a_{0.4}$Sc $O_{2.8}$의 경우에 가장 높았다.높았다.다.

Keywords

References

  1. J. Am. Ceram. Soc. v.76 no.3 Ceramic Fuel Cells N. Q. Minh
  2. Solid State Ionics v.3;4 Proton Conduction in Sintered Oxides and it's Application to Steam Electrolysis for Hydrogen Production H. Iwahara;T. Esaka;H. Uchida;N. Maeda
  3. Solid State Ionics v.47 Proton Conduction in Sintered Oxides Based on CaZrO₃ T. Yajima;H. Kazeoka;T. Yogo;H. Iwahara
  4. Solid State Ionics v.51 Proton Conduction in SrZrO₃-based Oxide T. Yajima;H. Suzuki;T. Yogo;H. Iwahara
  5. Solid State Ionics v.120 Simultaneous Doping with La³+ and Y³+ for Ba²+ - and Ce⁴+ -sites in BaCeO₃and the Ionic Conduction G. Ma;T. Shimura;H. Iwahara
  6. Solid State Ionics v.125 Chemical Stability and Proton Conductivity of Doped BaCeO₃- BaZrO₃Solid Solutions K. H. Ryu;S. M. Haile
  7. Solid State Ionics v.77 Mechanical Relaxtion Measurements in the Proton Conductors SrCeO₃and SrZrO₃ L. Zimmermann;H. G. Bohn;W. Schilling;E. Syskakis
  8. Solid State Ionics v.136;137 Structural Properties of SrCeO₃/SrZrO₃Proton Conducting Superlattices H. Yugami;F. Iguchi;H. Naito
  9. Solid State Ionics v.117 The High Temperature Proton Conductor Ba₃$Ca_1.18$$Nb_1.82$$O_9-δ$ Electrical Conductvity H. G. Bohn;T. Schober;T. Mono;W. Schilling
  10. Solid State Ionics v.118 The High Temperature Porton Conductor Ba₃$Ca_1.18$$Nb_1.82$$O_9-δ$ Electrochemical Cell Measurements and TEM T. Schober;H. G. Bohn;T. Mono;W. Schilling
  11. Solid State Ionics v.136;137 The Mixed Perovskite Ba$Ca_(1+x)/3$$Nb_(2-x)/3$$O_3-x/2$(x=0...0.18): Proton Uptake T. Schober;J. Friedrich
  12. Energy conversion v.11 Ionic Conduction in Perovskite-type Oxide Solid Solution and its Application to the Solid Electrolyte Fuel Cell T. Takahashi;H. Iwahara
  13. J. Am. Chem. Soc. v.116 Doped LaGaO₃Perovskite Type Oxide as a New Oxide Ionic Conductor T. Ishihara;H. Matsuda;Y. Takita
  14. Solid State Ionics Protonic Conductivity in Oxides of Perovskite Family A. V. Strelkov;A. R. Kaul;Yu. D. Tretyakov;M. Balkanski(ed.);T. Takahashi(ed.);H. L. Tuller(ed.)
  15. Solid State Ionics v.130 Sr-doped LaInO₃and its Possible Application in a Single Layer SOFC H. He;X. Huang;L. Chen
  16. Solid State Ionics v.98 Electrical Conduction Behavior in ($La_0.9$$Sr_0.1$)$M^Ⅲ$$O_3-a$($M^Ⅲ$=Al, Ga, In and Lu) Perovskites K. Nomura;S. Tanase
  17. Solid State Ionics v.97 Oxygen Diffusion and Proton Conduction in $La_1-x$$Sr_x$$YO_3-δ$ E. Ruiz-Trejo;J. A. Kilner
  18. Journal of Electroceramics v.2:2 Protonic Conduction in Perovskite-type Oxide Ceramics Based on LnScO₃(Ln=La, Nd, Sm or Gd) at High Temperature H. Fujii;Y. Katayama;T. Shimura;H. Iwahara
  19. Solid State Ionics v.125 Proton and Oxide Conductivity of Doped LaScO₃ D. Lybye;N. Bonanos
  20. Solid State Ionics v.136;137 On the Complexity of Proton Conduction Phenomena K. D. Kreuer
  21. Acta Cryst. v.A32 Revised Effective Ionic Radii and Synthetic Studies of Interatomic Distances in Halides and Chacogenides R. D. Shannon
  22. J. Phys. Chem. Solids v.30 Study of Solid Electrolyte Polarization by a Complex Admittance Method J. E. Bauerle