Determination of oxygen permeation kinetics in a ceramic membrane with the composition SrFe Co{sub 0.5}O{sub 3.25{minus}{delta}}
The oxygen permeation through an oxide membrane with bulk composition SrFeCo{sub 0.5}O{sub 3.25{minus}{delta}} has been measured as a function of both oxygen partial pressure and temperature. The results of the pressure dependence of the permeation indicate that the oxygen transport in this membrane is dependent primarily on the bulk diffusion rate. Although the permeation experiments were carried out at temperatures within, or very close to, the range where SrFeCo{sub 0.5}O{sub 3.25{minus}{delta}} is stable as a pure single phase, the membrane was found to consist of SrFe{sub 1.5{minus}x}Co{sub x}O{sub 3.25{minus}{delta}} (x = {approximately}0.42) together with fractions of Sr(Co,Fe)O{sub 3{minus}{delta}} perovskite and Co-Fe oxide that formed as stable phases during densification of the membrane at high temperature (1,090 C). These additional phases persisted in the membrane during the permeation measurements.
- Research Organization:
- Univ. of Houston, TX (US)
- Sponsoring Organization:
- Texas Center for Superconductivity, University of Houston; Welch Foundation; National Science Foundation; US Department of Energy
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 20019151
- Country of Publication:
- United States
- Language:
- English
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