Synthesis of MnFe2O4 nanoparticles by mechano chemical reaction

The influence of long-term milling of a mixture of MnCO3 and a-Fe2O3, and of MnO2 and a-Fe2O3 powders in a planetary ball mill on the reaction synthesis of nanosized MnFe2O4 ferrites was studied. The mechano-chemical reaction leading to formation of the MnFe2O4 spinel phase was followed by X-ray dif...

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Bibliographic Details
Published in:Journal of Optoelectronics and Advanced Materials 2006-02, Vol.8 (1), p.312-314
Main Authors: Osmokrovic, P, Jovalekic, C, Manojlovic, D, Pavlovic, M B
Format: Article
Language:English
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Summary:The influence of long-term milling of a mixture of MnCO3 and a-Fe2O3, and of MnO2 and a-Fe2O3 powders in a planetary ball mill on the reaction synthesis of nanosized MnFe2O4 ferrites was studied. The mechano-chemical reaction leading to formation of the MnFe2O4 spinel phase was followed by X-ray diffraction. The spinel phase was first observed after 10 h of milling and its formation was completed after 20 h in case of the MnCO3 - a-Fe2O3 mixture. The synthesized MnFe2O4 ferrite has a nanocrystalline structure with a crystallite size of about 28 nm. The thermal treatment of the as-milled powder at 400 deg C for 4 h led to formation of the MnFe2O4 crystalline phase in case of the mixture of MnCO3 and a-Fe2O3, but in MnO2 - a-Fe2O3 case thermal treatment at temperatures of 400 deg C and higher leads to formation of (Mn,Fe)2O3 and separation of Mn2O3 and Fe2O3.
ISSN:1454-4164