Fabrication of asymmetric tubular mixed-conducting dense membranes by a combined spin-spraying and co-sintering process

▸ Asymmetric tubular SCFZ membrane was prepared by spin-spraying and co-sintering. ▸ Dense and crack-free SCFZ layer with a uniform thickness of 20 μm was obtained. ▸ Thin membrane layer improves the oxygen flux and decreases the permeation activation energy.