The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
권호 표지

Dissolution of Protons in Oxides

  • Norby, Truls (Center for Materials Science, University of Olso)
  • Published : 1998.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

The paper gives a brief introduction to protonic defects and their chemistry, thermodynamics and transport in oxides. The temperature dependence of the equilibrium concentration of protons is illustrated and compared for different acceptor-doped oxides. The difficulties of saturating as well as emptying the oxides of protons are discussed. In order to illustrate the possibility of lattice relaxation of defects, a conceptual study is made of a case where the enthalpy of dissolution of protons(water) at the cost of oxygen vacancies is assumed dependent on the concentration of vacancies. It is shown how this changes the behavior of hydration curves vs temperature and water vapour pressure. finally, a discussion is given on the water uptake in heavily oxygen deficient oxides; how water uptake may affect order-disorder in the oxygen sublattice and eventually lead to defective, disordered or ordered oxyhydroxides or hydroxides of potential interest as intermediate temperature proton conductions.

Keywords

References

  1. Rev. Chim. Miner. v.17 Protonic Conduction in Perovskite Type Oxide Solid Solutions T. Takahashi;H. Iwahara
  2. Solid State Ionics v.69 Fast High-temperature Proton Transport in Nonstoichiometric Mixed Perovskites K. C. Liang;Y. Du;A. S. Nowick
  3. Solid State Ionics v.98 High Proton Conductivity in Barium Yttrium Stanate Ba₂$YSnO_{5.5}$ P. Murugaraj;K.-D. Kreuer;T. He;T. Schober;J. Maier
  4. Chem. Mater v.8 Proton Conductivity : Materials and Applications K.-D. Kreuer
  5. Solid State Ionics v.97 Isotope Effect and Proton Hopping in High-temperature Protonic Conductors A.S. Nowick;A. V. Vaysleyb
  6. J. Chem. Phys. v.25 Hydrogen as a Donor in Zinc Oxide D. G. Thomas;J. J. Lander
  7. Solid State Ionics v.86-88 High Proton Mobility in Hydrogenated Yttrium-barium Cuprate with both Normal and Increased Oxygen Content $(H_{2m{\to}h}Ba_2YCu_3O_{6.5+m}$ m=0; 1; 2, h≤0,d≤1) Yu, M. Baikov;S. E. Nikitin
  8. Current Opinion in Solid State & Materials Science v.2 Concentration and Transport of Protons in Oxides T. Norby;Y. Larring
  9. Solid State Ionics v.97 The Equilibrium between Oxygen Vacancies, Water Vapour and Protons in Rare Earth Oxides Y. Larring;T. Norby
  10. 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
  11. J. Am. Ceram. soc. v.67 Electrical Conductivity and Defect Structure of $Y_2O_3$ as a Function of Water Vapor Pressure T. Norby;P. Kofstad
  12. Solid State Ionics v.77 Transport Number Determinations by the Concentration Cell/open-cricuit Voltage Method for Oxides with Mixed Electronic, Ionic, and Protonic Conductivity D. Sutija;T. Norby;P. Bjonbom
  13. Solid State Ionics v.91 Galvanic Cell Measurements on a Fast Proton Conducting Complex Perovskite Electrolyte Y. Du;A. S. Nowick
  14. R. Glokner;M. S. Islam;T., Norby
  15. Ber. Bunsenges. Phys. Chem. v.101 Defect Interactions in Proton Conducting Perovskite-type Oxides K. D. Kreuer;W. Munch;M. Ise;T. He;A. Fuchs;U. Traub;J. Maier
  16. Solid State Ionics v.50 Studies on Behavior and Mobility of Protons in Doped Perovskite-type Oxides:(I) In Situ Measurement of Hydrogen Concentration in $SrCe_{0.95} Yb_{0.05}O_{3-{\alpha}}$ at High Temperature T. Yajima;H. Iwahara
  17. Solid State Ionics v.82 Protonic Conduction in $Ba_2In_2O_5$ G. B. Zhang;D. M. Smyth
  18. J. Am. Ceram. Soc. v.69 Direct-current Conductivity of $Y_2O_3$ as a Function of Water Vapor Pressure T. Norby;P. Kofstad
  19. Solid State Ionics v.86-88 Ionic Conduction in Pyrochlore-type Oxides Containing Rare Earth Elements at High Temperature T. Shimura;M. Komori;H. Iwahara
  20. Solid State Ionics v.99 Phase Transition in the Oxygen and Proton Conductor $Ba_2In_2O_5$ in Humid Atmosphere Below 300℃ T. Schober;J. Friedrich;F. Krug