Specific Features of the Structural State of Iron Ions in Iron-Containing Composites Irradiated by Fast Electrons |
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Authors: | Marakin O A |
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Institution: | (1) Department of Physics, Technical University of Cluj-Napoca, 400641 Cluj-Napoca, Romania;(2) National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj-Napoca, Romania |
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Abstract: | The present paper analyzes the valence-coordination state of iron atoms in polymer composite materials fabricated from polystyrene and iron-ore concentrates – magnetite and hematite – upon exposure to fast electrons with energy of 6.2 MeV and fluence of 1018 electrons/cm2. Changes in the phase content and valence-coordination and magnetic states of iron atoms are established. After irradiation, the hematite phase is transformed into the magnetite phase with a predominance of Fe3+ ions with FeO4] coordination, and the magnetite phase forms the wüstite-type (FeO) phase in which Fe2+ ions are arranged in FeO6] coordination. |
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