The present invention relates to a thin separation membrane, comprising at least a porous anode layer, a membrane layer comprising a mixed conducting material and a porous cathode layer, wherein the anode layer and the cathode layer comprise the mixed cond...

Oxide ceramic (A), able to conduct oxygen ions and electrons, has the perovskite structure ABO3, where the B positions are partially replaced by divalent cations with a fixed oxidation state and, the new feature, contains no cobalt. Independent claims are ...