Institution: | a Department of General and Inorganic Chemistry, Vilnius University, Naugarduko 24, LT-2006, Vilnius, Lithuania b ICMAB-CSI, Campus UAB. 08193 Bellaterra, Barcelona, Spain c LMGP-ENSPG, INPG, UMR CNRS 5628, Saint Martin d’Hères, France d Epichem Limited, Power Road, Bromborough, Wirral, CH62 3QF, UK e Centro de Fizica Aplicada y Technologia Avanzada-UNAM A.P. 1-1010, Santiago de Queretaro, QRO. C.P. 76000, Mexico |
Abstract: | Dense ceramic mixed ionic and electronic conducting membranes have been deposited by atmospheric spray-pyrolysis technique onto porous ceramic substrates. Perovskite oxide layers, i.e. manganites La1−xSrxMnO3, ferrites La1−xSrxFe1−y(Co,Ni)yO3, gallates La1−xSrxGa1−y(Co,Ni,Fe)yO3, cobaltites La1−xSrxCoO3 and related perovskites such as lanthanum nickelate La2NiO4 layers have been prepared. The structure, morphology and composition of the layers were characterised by XRD, SEM and WDS, respectively. Density and gas tightness of the layers were studied as a function of deposition process parameters, film thickness (from 0.5 to 3 μm) and preparation procedure. The presence of cracks and defects due to thermo-mechanical stresses applied during or after the preparation process were correlated with the membrane composition and the corresponding thermal expansion coefficient differences between substrates and membranes. |