Phase interaction and oxygen transport in La0.8Sr0.2Fe0.8Co0.2O3–(La0.9Sr0.1)0.98Ga0.8Mg0.2O3 composites

Design and experimental investigation of oxide ceramic dual-phase membranes

“…The composite powder for pressing dual-phase membrane disks was usually prepared by mixing two as-synthesized powders [34][35][36][37]42,[45][46][47][48]. In previous research, we found that dual-phase membranes derived from the one-pot method show higher oxygen permeability than those derived from mixing two as-synthesized powders [40], and other researchers have also verified our findings [49].…”

“…Zirconia reacts easily with perovskite oxides to produce zirconates and pyrochlores when they are sintered together at elevated temperatures, and the resulting new compounds, with poor ionic and electronic conductivity, block the transport of ions and electrons. Elements in electronic conducting perovskite oxides easily diffuse into the La 1−x Sr x Ga 1−y Mg y O 3−ı lattice and produce a new perovskite oxide, which usually has normal stability and permeability [42]. Therefore, these two ionic conductors are unsuitable unless a compatible electronic conductor is used.…”

Oxygen reduction at thin dense La0.52Sr0.48Co0.18Fe0.82O3–δ electrodes

“…The density at room temperature has been linearly interpolated from the values obtained at various strontium contents [18][19][20]. The density at 600°C was calculated by taking into account the linear expansion between room temperature to the final temperature [20].…”

“…The electrochemical rate constants K fb , K bb , K fs and K bs are dependant of the electrode potential. For reactions where the B sites are involved (see reactions (19) and (20) for instance), it is believed that the rate constants are identical regardless of the involved redox couple (Co Á Co Co x Co or Co x Co Co 0 Co ). In order to numerically implement the bulk diffusion of oxygen vacancies in the model, the thickness, d, of the LSCF film has been segmented in m compartments of equal length, l (see Fig.…”

Methane Partial Oxidation Using A (La0.6Sr0.4)(Ga0.8Mg0.05Co0.15)O3–δ Membrane

“…Stability can also be improved by co-doping the material with less reducible ions, e.g., Zr 4+ and Ga 3+ . The gallate materials, such as (La,Sr)(Ga,Fe)O 3 [8,[23][24][25][26], appear to be especially promising regarding their stability.…”