0100762 - UACH-T 20043009 RIV NL eng J - Článek v odborném periodiku
Alcala, M. D. - Criado, J. M. - Real, C. - Grygar, Tomáš - Nejezchleba, Martin - Šubrt, Jan - Petrovský, Eduard
Synthesis of nanocrystalline magnetite by mechanical alloying of iron and hematite.
[Příprava nanokrystalického magnetitu vysokoenergetickým mletím železa a hematitu.]
Journal of Materials Science. Roč. 39, č. 7 (2004), s. 2365-2370. ISSN 0022-2461. E-ISSN 1573-4803
Výzkumný záměr: CEZ:AV0Z4032918
Klíčová slova: electrochemical dissolution * gamma-FE2O3 particles * thermal-stability
Kód oboru RIV: CA - Anorganická chemie
Impakt faktor: 0.864, rok: 2004

The synthesis of magnetite has been studied by mechanical alloying in an inert atmosphere of a stoichiometric mixture of micrometric particle size iron and hematite powders. The final products have been characterised by chemical analysis, SEM, TEM, XRD, Mossbauer spectroscopy as well as specific surface and magnetic measurements. The magnetite obtained in this way exhibits a high magnetic hardness. The formation of a wustite layer on the magnetite core, because of the reaction between magnetite and iron contamination coming from the bowls and grinding balls, tends to decrease the coercive force of magnetite. The formation of this phase would be avoided by controlling the grinding time.

Magnetit byl připraven mletím mikročástic hematitu a železa a pak studován chemickou analýzou, elektronovou mikroskopií, rtg difrakcí a Mossbauerovou spektroskopií. Magnetit se vyznačoval velkou magnetickou tvrdostí a po dlouhém mletí obsahoval příměs wustitu (FeO).
Trvalý link: http://hdl.handle.net/11104/0008252