Perovskite-related ZrO2-doped SrCo0.4Fe0.6O3-delta membrane for oxygen permeation

A typical perovskite La0.2Sr0.8Co0.2Fe0.8O3-delta (LSCF) membrane and a nov el perovskite-related ZrO2-doped SrCo0.4Fe0.6O3-delta (SCFZ) membrane were successfully prepared. The sintered membranes were characterized by an in-s itu high-temperature X-ray diffraction, scanning electron microscopy and en ergy dispersive spectroscopy. Oxygen permeabilities of the two dense membra nes were measured in the temperature range of 923 to 1,173 K under a fixed oxygen partial pressure gradient. The results of the oxygen permeation expe riment and high-temperature X-ra diffraction in argon atmosphere indicate t hat the perovskite-related SCFZ membrane has higher oxygen fluxes and is st able than that of the LSCF membrane at elevated temperatures and reduced ox ygen partial pressures.