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Solid-state synthesis of alpha-Fe and iron carbide nanoparticles by thermal treatment of amorphous Fe2O3
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SYSNO ASEP 0341011 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Solid-state synthesis of alpha-Fe and iron carbide nanoparticles by thermal treatment of amorphous Fe2O3 Author(s) Schneeweiss, Oldřich (UFM-A) RID, ORCID
Zbořil, R. (CZ)
David, Bohumil (UFM-A) RID
Heřmánek, M. (CZ)
Mašláň, M. (CZ)Number of authors 5 Source Title ISIAME 2008. - New York : Springer, 2009 / Kuzmann E. ; Lazar K. - ISBN 978-3-642-01369-0 Pages s. 167-173 Number of pages 7 s. Action International Symposium on the Industrial Applications of the Mossbauer Effect (ISIAME 2008) /7./ Event date 17.08.2008-22.08.2008 VEvent location Budapest Country HU - Hungary Event type WRD Language eng - English Country US - United States Keywords Iron oxides ; Solid-state synthesis ; Nanocrystalline powder Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA106/08/1440 GA ČR - Czech Science Foundation (CSF) 1M0512 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000273775100020 Annotation Thermal treatment of amorphous iron(III) oxide nanopowder (2–3 nm) in various atmospheres is presented as a simple route towards α-Fe and iron carbides nanoparticles. The chemical composition and size of nanoparticles can be controlled using the reaction temperature, annealing time and atmosphere (hydrogen, carbon monoxide, hydrocarbons). To monitor the structure, phase composition, size, morphology and magnetic properties of nanoparticles, XRD, Mössbauer spectroscopy, and magnetic measurements were carried out. The measurements of temperature dependence of magnetic moment yield information on the critical temperatures of magnetic and phase transformations. Application of hydrogen atmosphere results in the formation of α-Fe, while iron carbides (Fe3C) can be obtained in atmospheres of carbon monoxide or hydrocarbons. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2010
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