Oxygen transport in Ce0. 8Gd0. 2O2− δ-based composite membranes
VV Kharton, AV Kovalevsky, AP Viskup, AL Shaula… - Solid State Ionics, 2003 - Elsevier
Gadolinia-doped ceria electrolyte Ce0. 8Gd0. 2O2− δ (CGO) and perovskite-type mixed
conductor La0. 8Sr0. 2Fe0. 8Co0. 2O3− δ (LSFC), having compatible thermal expansion
coefficients (TECs), were combined in dual-phase ceramic membranes for oxygen
separation. Oxygen permeability of both LSFC and composite LSFC/CGO membranes at
970–1220 K was found to be limited by the bulk ambipolar conductivity. LSFC exhibits a
relatively low ionic conductivity and high activation energy for ionic transport (∼ 200 kJ/mol) …
conductor La0. 8Sr0. 2Fe0. 8Co0. 2O3− δ (LSFC), having compatible thermal expansion
coefficients (TECs), were combined in dual-phase ceramic membranes for oxygen
separation. Oxygen permeability of both LSFC and composite LSFC/CGO membranes at
970–1220 K was found to be limited by the bulk ambipolar conductivity. LSFC exhibits a
relatively low ionic conductivity and high activation energy for ionic transport (∼ 200 kJ/mol) …
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