• Publications
  • Influence
Importance of the surface exchange kinetics as rate limiting step in oxygen permeation through mixed-conducting oxides
Attention is drawn to the possible involvement of the surface exchange kinetics in limiting the rate of oxygen permeation through mixed-conducting oxide ceramics. A theoretical approach is providedExpand
  • 394
  • 5
  • PDF
Influence of order-disorder transitions on oxygen permeability through selected nonstoichiometric perovskite-type oxides
New results on the oxygen permeability of perovskite-type oxides SrCo0.8B'0.2O3−σ (with B'=Cr, Fe, Co and Cu) and La0.6Sr0.4CoO3−δ are presented. The occurrence of order-disorder transitions atExpand
  • 285
  • 4
  • PDF
High-temperature coulometric titration of La1-xSrxCoO3-δ : Evidence for the effect of electronic band structure on nonstoichiometry behavior
The equilibrium oxygen chemical potential and the partial energy and entropy of O2in perovskites La1−xSrxCoO3−δwere measured as a function ofδandxby high-temperature oxygen coulometric titration. AnExpand
  • 80
  • 3
  • PDF
Structural instability of cubic perovskite BaxSr1 − xCo1 − yFeyO3 − δ
Cubic perovskites BaxSr1 − xCo0.8Fe0.2O3 − δ (BSCF) are among the most promising oxygen permeable membrane materials and high-performance cathode materials for intermediate temperature solid oxideExpand
  • 313
  • 2
Reactor Flush Time Correction in Relaxation Experiments
The present paper deals with the analysis of experimental data from conductivity relaxation experiments. It is shown that evaluation of the chemical diffusion and surface transfer coefficients forExpand
  • 95
  • 2
Oxygen transport through La1 − xSrxFeO3 − δ membranes II. Permeation in air/CO, CO2 gradients
Oxygen permeation measurements were performed on dense La1 − xSrxFeO3 − δ (x = 0.1-0.4) membranes in large oxygen activity gradients, i.e. air/CO, CO2, in the temperature range 1173–1323 K, yieldingExpand
  • 152
  • 1
Ion and mixed conducting oxides as catalysts
This paper gives a survey of the catalytic properties of solid oxides which display oxygen ion or mixed (i.e. ionic + electronic) conductivity. Particular consideration is given to theExpand
  • 158
  • 1
  • PDF
Chemical diffusion and oxygen surface transfer of La1-xSrxCoO3-δ studied with electrical conductivity relaxation
The chemical diffusion coefficient and oxygen-transfer coefficients of selected compositions in the series $La_1-xSr_xCoO_3-delta$ were studied using the conductivity relaxation technique.Expand
  • 79
  • 1
Phase transformation and oxygen equilibration kinetics of pure and Zr-doped Ba0.5Sr0.5Co0.8Fe0.2O3−δ perovskite oxide probed by electrical conductivity relaxation
Electrical conductivity relaxation is used for monitoring the cubic-to-hexagonal phase transition in the perovskite-type oxide Ba0.5Sr0.5Co0.8Fe0.2O3−δ. After in situ annealing at 1173 K, at whichExpand
  • 62
  • 1
Oxygen transport through La1-xSrxFeO3-(delta) membranes. I. Permeation in air/He gradients
Oxygen permeation measurements in air/He gradients were performed on dense La1 ? xSrxFeO3 ? ? membranes in the composition range x = 0.1?0.4 and temperature range 1123?1323 K. Pretreatment of theExpand
  • 181
  • 1