Abstract
New La/Zn substituted strontium ferrites Sr(2 −x)La x [Fe(2 − x)Zn x ]O5, (0 ≤ x ≤ 0.3) with brownmillerite- type structure are obtained and studied via X-ray phase analysis and Mössbauer spectroscopy. Depending on the conditions of synthesis, substituting Zn2+ cations can either mainly occupy tetrahedral positions in a brownmillerite structure, or be uniformly distributed between the tetrahedral and octahedral positions. It is shown that they are reversibly oxidized by atmospheric oxygen at elevated temperatures.
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Original Russian Text © K.V. Pokholok, D.S. Filimonov, M.G. Rozova, O.A. Tyablikov, 2017, published in Izvestiya Rossiiskoi Akademii Nauk, Seriya Fizicheskaya, 2017, Vol. 81, No. 7, pp. 960–965.
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Pokholok, K.V., Filimonov, D.S., Rozova, M.G. et al. Zn-substituted brownmillerite-type strontium ferrites. Bull. Russ. Acad. Sci. Phys. 81, 869–873 (2017). https://doi.org/10.3103/S1062873817070218
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DOI: https://doi.org/10.3103/S1062873817070218