Abstract
X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and Mössbauer spectroscopy have been used to investigate the structural phase transformations of SrCo0.5Fe0.5O3 − δ-based mixed-oxide nanocomposites containing fine iron oxide particles. The nanocomposites have been prepared using sol-gel and mechanochemical processes. The addition of iron(III) oxide sol to SrCo0.5Fe0.5O3 − δ xerogel is shown to enhance the thermal stability of the resultant cubic perovskite phase. The stabilization is due to partial shielding of the perovskite surface with a thin Fe2O3 layer, which hinders cobalt diffusion to the surface, preventing Co3O4 formation.
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Original Russian Text © M.I. Ivanovskaya, D.A. Kotikov, V.V. Pan’kov, V.V. Zyryanov, 2009, published in Neorganicheskie Materialy, 2009, Vol. 45, No. 8, pp. 981–986.
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Ivanovskaya, M.I., Kotikov, D.A., Pan’kov, V.V. et al. Structure of SrCo0.5Fe0.5O3 − δ-based composites prepared by sol-gel and mechanochemical processes. Inorg Mater 45, 910–915 (2009). https://doi.org/10.1134/S0020168509080160
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DOI: https://doi.org/10.1134/S0020168509080160