The O permeability and electrical conductivity of BaBi1-xLaxO3 perovskite-like solid solutions, where x was equal to 0, 0.2 or 0.4, were found to decrease with the La content. The O transport through dense ceramic membranes, with thicknesses ranging from 0.6 to 1.2mm, was shown to be limited both by the bulk ionic conductivity and by the surface exchange rate.

A.A.Yaremchenko, V.V.Kharton, A.P.Viskup, E.N.Naumovich, V.V.Samokhval: Materials Research Bulletin, 1998, 33[7], 1027-33