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T. F. MARINCA1,* , I. CHICINAŞ1, O. ISNARD2, B. V. NEAMȚU1
The nanocrystalline/nanosized magnetite – Fe3O4 particles have been obtained by heat treatment mixture of hematite - α-Fe2O3 and elemental Fe stoichiometric mixture and subsequent mechanical milling procedure. The powder has been investigated by X-ray diffraction, laser particle size analysis and magnetic studies. The mean crystallite size of the Fe3O4 rapidly decrease by increasing the milling time. After 5 minutes it is about 14 nm. Prolonged milling times lead to the oxidation of magnetite into hematite. The particles size presents a rapid decrease in the first stage of milling, up to 3 minutes of milling. The specific surface and the number of nanometric particles increase also in the first stage of milling. The magnetisation decreases for milling times longer than 15 minutes and tends to become unsaturated..
Magnetite, Iron oxide, Nanocrystalline, Mechanical milling, Nanoparticles.
T. F. MARINCA, I. CHICINAŞ, O. ISNARD, B. V. NEAMȚU, Nanocrystalline/nanosized Fe3O4 particles obtained by heat treatment and mechanical milling, Optoelectronics and Advanced Materials - Rapid Communications, 9, 5-6, May-June 2015, pp.730-733 (2015).
Submitted at: Oct. 31, 2014
Accepted at: May 7, 2015
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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