Abstract
Iron nanopowders ranging in particle size from 20 to 100 nm have been synthesized by reducing a 1-mm-thick iron(III) hydroxide layer in flowing hydrogen at 400°C and then passivated for 6–60 min in flowing argon containing 3% air. Our results demonstrate that the passivated iron nanopowders do not oxidize in air for six months. The iron nanoparticles have been characterized by X-ray diffraction (crystallite size evaluation), Auger electron spectroscopy, and polymolecular adsorption. The passivated iron nanoparticles have been shown to consist of a metallic core and oxide shell 2–4 nm in thickness.
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Original Russian Text © M.I. Alymov, N.M. Rubtsov, B.S. Seplyarskii, V.A. Zelenskii, A.B. Ankudinov, 2017, published in Neorganicheskie Materialy, 2017, Vol. 53, No. 9, pp. 929–933.
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Alymov, M.I., Rubtsov, N.M., Seplyarskii, B.S. et al. Preparation and characterization of iron nanoparticles protected by an oxide film. Inorg Mater 53, 911–915 (2017). https://doi.org/10.1134/S0020168517090011
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DOI: https://doi.org/10.1134/S0020168517090011