Abstract
The novel Fe/Nb co-substituted SrCo1-2x(Fe,Nb)xO 3-δ (x = 0.05, 0.10) oxides have been synthesized and characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetry (TG), and scanning electron microscopy (SEM). The XRD and DSC results demonstrate that the structural stability of the Fe/Nb co-substituted samples x = 0.05, 0.10 is improved greatly compared to the sample x = 0.00. The Fe/Nb co-doping in the SrCoO3-δ oxide results in the improved structural stability of the SrCo1-2x(Fe,Nb) xO3-δ (x = 0.05, 0.10) oxides. The nonstoichiometric and sintering properties were investigated by TG and SEM, and the oxygen permeation fluxes were measured at 800-950 °C for the sample x = 0.10. The improved oxygen permeability of the ceramic SrCo1-2x(Fe,Nb) xO3-δ (x = 0.10) membrane compared to the (Ba 0.5Sr0.5)(Co0.8Fe0.2)O 3-δ and SrCo0.8Fe0.2O3-δ membranes, was observed under an air/He oxygen partial pressure gradient at 800-950 °C.
Original language | English |
---|---|
Pages (from-to) | 443-448 |
Number of pages | 6 |
Journal | Materials Science and Engineering: B |
Volume | 178 |
Issue number | 7 |
DOIs | |
State | Published - 20 Apr 2013 |
Keywords
- Crystal structure
- Oxygen permeability
- Perovskite oxides
- Sintering
- Structural stability