Structure and Thermo-Chemical Stability of Sr-Fe-Co-O Mixed Metal Oxides

Abstract:

SrFe_xCo_0.5O_δ (x=0.5, 0.75, 1.0, 1.25) mixed metal oxides were synthesized by the citrate method. The structure and thermo-chemical stability of the obtained SrFe_xCo_0.5O_δ powders were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD results show that the SrFe_xCo_0.5O_δ powders are composed of perovskite-type cubic structure at both room temperature and high temperature. The crystalline phases of the SrFe_xCo_0.5O_δ powders are dependent on the content of Fe and SrFe_0.5Co_0.5O₃, SrFe_0.19Co₀₈₁O_2.78 are the main crystalline phases. The powders have good thermo-chemical stability at elevated temperatures in helium, which is confirmed by an in-situ high-temperature X-ray diffraction. The SEM images show that the product of the SrFe_xCo_0.5O_δ (x=0.5, 1.0) is composed of single grain, while other two samples consist of layer structures and some open porosities.

• Periodical: Advanced Materials Research (Volume 549)
• Pages: 193-197
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.549.193
• Online since: July 2012
• Authors: Xiang Hong Huang, Jun Qiao, Qian-Feng Zhang
• Keywords: Sr-Fe-Co-O Mixed Metal Oxides, Structure, Thermo-Chemical Stability, X-Ray Diffraction (XRD)

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