1994
DOI: 10.1557/proc-369-383
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Oxygen Permeation Studies of SrCo0.8Fe0.2O3-δ

Abstract: Oxygen permeation fluxes through dense SrCo0.80Fe0.20O3-5 discs have been measured in the temperature range of 620-920 °C under various oxygen partial pressure gradients. The permeation results are compared with the previous measurements. Below 800 *C, the apparent activation energy for the overall permeation is 22±4 kcal/mol. The permeation results are discussed in light of the phase diagram of SrCo0.80Fe0.2003-8. Based on experiments in which the membrane thickness is varied, we propose that the surface exch… Show more

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“…Sr(Co,Fe)O 3 materials possess the highest specific permeability (about 10 -7 mol.cm -1 .s -1 ) but are unstable [21], due to a perovskite to brownmillerite phase change. The stability of LaCoO 3 is also insufficient, as reported in [19,20], and shown in Fig.2.…”
Section: Permeability and Chemical Stability Requi-rementsmentioning
confidence: 99%
“…Sr(Co,Fe)O 3 materials possess the highest specific permeability (about 10 -7 mol.cm -1 .s -1 ) but are unstable [21], due to a perovskite to brownmillerite phase change. The stability of LaCoO 3 is also insufficient, as reported in [19,20], and shown in Fig.2.…”
Section: Permeability and Chemical Stability Requi-rementsmentioning
confidence: 99%