Investigation of the Microstructure Features of SrCo0.8Fe0.2O3-delta Perovskite Review
Journal |
Journal of Solid State Electrochemistry
ISSN: 1432-8488 , E-ISSN: 1433-0768 |
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Output data | Year: 2012, Volume: 16, Number: 7, Pages: 2411-2418 Pages count : 8 DOI: 10.1007/s10008-012-1716-5 | ||||
Tags | Microstructural evolution; Oxygen; Stoichiometry; X ray diffraction | ||||
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Abstract:
Specific powder X-ray diffraction pattern of the as-prepared SrCo0.8Fe0.2O2.66 membrane materials, characterized by the presence of narrow intense perovskite reflections, and weak diffuse brownmillerite maxima can be described correctly as a two-phase system: cubic perovskite (78%) and “pseudocubic” brownmillerite (22%) with particle size D>100 nm and D~20 nm, respectively. On the basis of examination of the phase composition depending on oxygen stoichiometry with the help of chronopotentiometry, potential step scanning techniques, ex situ X-ray diffraction measurements and Mössbauer spectroscopy data, we propose a model of nanostructuring
of SrCo0.8Fe0.2O2.66 material. In the model, the slabs of perovskite ABO3−δ (..OOO−δ..) are coherently
jointed with brownmillerite layers A2B2O5 (..OTOT…) along the direction [010]. In order to meet the condition of
coherence, cell parameters for brownmillerite and perovskite obey the relations: aBM0cBM0√2ap and bBM04ap,
which agrees with the experimental diffraction data. The proposed model of nanostructured SrCo0.8Fe0.2O2.66 is in
agreement with the results of full profile modeling of diffraction patterns by means of the Debye equation.
Cite:
Belenkaya I.V.
, Cherepanova S.V.
, Nemudry A.P.
Investigation of the Microstructure Features of SrCo0.8Fe0.2O3-delta Perovskite
Journal of Solid State Electrochemistry. 2012. V.16. N7. P.2411-2418. DOI: 10.1007/s10008-012-1716-5 WOS Scopus РИНЦ
Investigation of the Microstructure Features of SrCo0.8Fe0.2O3-delta Perovskite
Journal of Solid State Electrochemistry. 2012. V.16. N7. P.2411-2418. DOI: 10.1007/s10008-012-1716-5 WOS Scopus РИНЦ
Files:
Full text from publisher
Dates:
Submitted: | Dec 30, 2011 |
Accepted: | Mar 5, 2012 |
Published online: | Mar 29, 2012 |
Published print: | Jul 1, 2012 |
Identifiers:
Web of science | WOS:000305474200015 |
Scopus | 2-s2.0-84866245645 |
Elibrary | 22038510 |
Chemical Abstracts | 2012:868335 |
Chemical Abstracts (print) | 158:112464 |
OpenAlex | W1983612045 |