Determination of Diffusion Coefficients of Oxygen Vacancies in La0.58Sr0.4Co0.2Fe0.8O3-δ Perovskite Type Oxides

D. Schlehuber; Egbert Wessel; Lorenz Singheiser; T. Markus

doi:10.4028/www.scientific.net/DDF.289-292.551

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Determination of Diffusion Coefficients of Oxygen Vacancies in La_0.58Sr_0.4Co_0.2Fe_0.8O_3-δ Perovskite Type Oxides

Abstract:

One possibility to run a zero CO2-emission power plant is the oxyfuel combustion process. An efficient technology to separate oxygen from air are processes with oxygen transport membranes. It is important that these membranes have a high permeability additional to high chemical stability under power plant conditions. La0.58Sr0.4Co0.2Fe0.8O3- (LSCF) is a mixed ionic electronic conducting material (MIEC) which is considered to have good permeation properties and a high stability. In this work LSCF based membranes are investigated. Data from a TGA (Thermo-Gravimetric Analyser) have been used to determine the diffusion coefficient of oxygen vacancies in LSCF perovskite type oxides for different temperatures.