“…In Figure 1 an oxide membrane is schematically divided into the bulk oxide and the adjacent interfaces, emphasizing both solid state diffusion and surface electrochemical reactions in the mass transport of the oxygen species. Among the limited experimental studies on oxygen permeation through fast ionic conductors, almost all studies focused on the oxygen permeation through relatively thick (> 500 pm) stabilized zirconia films which are essentially ionic conductors (Alcock and Chan, 1972;Palguev et al, 1972;Fouletier et al, 1976;Dou et al, 1985;Park and Blumenthal, 1989;Bouwmeester et al, 1992). In these studies, most researchers considered only the oxygen transport through the bulk oxide.…”