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Oxygen Stoichiometry and Phase Transitions of SrCo1– xFexO3 – δ

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Abstract

The oxygen stoichiometry of SrCo1 – x Fe x O3 – δ(0.1 ≤ x≤ 0.9) solid solutions was determined by solid-electrolyte coulometry as a function of temperature (20–1000°C) and oxygen partial pressure (1–100 Pa). The results, together with X-ray diffraction studies between 400 and 900°C, indicated a sequence of phase transitions: perovskite → brownmillerite → high-temperature perovskite. The composition stability region of the parent perovskite structure was shown to be 0.2 <x≤ 1.0. The Co-rich samples (x≤ 0.2) consisted of perovskite and hexagonal phases.

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Authors and Affiliations

  1. Institute of General and Inorganic Chemistry, Belarussian Academy of Sciences, ul. Surganova 9, Minsk, 220072, Belarus

    L. V. Kokhanovskii, V. V. Vashuk, O. P. Ol'shevskaya & O. I. Kirilenko

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  1. L. V. Kokhanovskii
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  2. V. V. Vashuk
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  3. O. P. Ol'shevskaya
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  4. O. I. Kirilenko
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Kokhanovskii, L.V., Vashuk, V.V., Ol'shevskaya, O.P. et al. Oxygen Stoichiometry and Phase Transitions of SrCo1– xFexO3 – δ. Inorganic Materials 37, 730–736 (2001). https://doi.org/10.1023/A:1017642610832

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