Perovskite-type solid solutions were found in the oxide system, La1-xPbxFeO3, where x ranged from 0.1 to 0.3. Sintering of the ceramics at temperatures above 1300K led to a cation deficiency, in the La sub-lattice, due to lead oxide evaporation. The electrical conductivity and O permeation fluxes increased with increasing x-value. The permeation fluxes through La1-xPbxFeO3 were shown to be limited by the bulk ionic conductivity.

V.V.Kharton, A.P.Viskup, E.N.Naumovich, A.A.Tonoyan, O.P.Reut: Materials Research Bulletin, 1998, 33[7], 1087-93