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Kinetics of Reduction of α-Fe2O3 Nanopowder with Hydrogen under Power Mechanical Treatment in an Electromagnetic Field

  • NEW METHODS OF TREATMENT AND PRODUCTION OF MATERIALS WITH REQUIRED PROPERTIES
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Inorganic Materials: Applied Research Aims and scope

Abstract

The kinetics of reduction of α-Fe2O3 nanopowder with hydrogen in an electromagnetic field with power mechanical treatment (PMT) in a vortex layer of ferromagnetic particles rotating in the field has been investigated. The kinetic parameters are calculated under the conditions of linear heating and isothermal conditions in accordance with the Freeman–Carroll and McKewan models, respectively. It is established that the electromagnetic field reduces the rate of reduction of the α-Fe2O3 nanopowder to 19% at 400°C, and PMT in a vortex layer intensifies the reduction process up to 4 times. The properties of the starting material and reduction products are studied using the thermogravimetry, X-ray diffraction, and electron microscopy methods.

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Authors and Affiliations

  1. National University of Science and Technology MISiS, 119049, Moscow, Russia

    Yu. V. Konyukhov, V. M. Nguyen & D. I. Ryzhonkov

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  1. Yu. V. Konyukhov
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  2. V. M. Nguyen
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  3. D. I. Ryzhonkov
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Correspondence to Yu. V. Konyukhov, V. M. Nguyen or D. I. Ryzhonkov.

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Translated by O. Kadkin

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Konyukhov, Y.V., Nguyen, V.M. & Ryzhonkov, D.I. Kinetics of Reduction of α-Fe2O3 Nanopowder with Hydrogen under Power Mechanical Treatment in an Electromagnetic Field. Inorg. Mater. Appl. Res. 10, 706–712 (2019). https://doi.org/10.1134/S2075113319030171

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