Mixed ionic-electronic conducting (MIEC) ceramics as oxygen transport membranes (OTMs) can
provide high oxygen permeation rates at comparably low energy demands. For this purpose Ba .
Sr . Co . Fe .2O d (BSCF) shows the best performance under ideal operating conditions. Thermal
and chemical stability investigations electrical behavior s(T pO2 t) and oxygen exchange
parameter extraction by means of electrical conductivity relaxation resulted in a far better
understanding of the BSCF system.
