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Synthesis of MnFe2O4 nanoparticles by mechano chemical reaction

P. OSMOKROVIC1,* , C. JOVALEKIC2, D. MANOJLOVIC3, M. B. PAVLOVIC1

Affiliation

  1. Faculty of Electrical Engineering, B. Kralja Aleksandra 73, Belgrade, Serbia and Montenegro
  2. Center for Multidisciplinary Studies, Kneza Višeslava 1a, Belgrade, Serbia and Montenegro
  3. Faculty of Chemistry, Studentski trg 12-16, Belgrade, Serbia and Montenegro

Abstract

The influence of long-term milling of a mixture of MnCO3 and α-Fe2O3, and of MnO2 and α-Fe2O3 powders in a planetary bal mill on the reaction synthesis of nanosized MnFe2O4 ferrites was studied. The mechano-chemical reaction leading to formation of the MnFe2O4 spinel phase was folowed by X-ray diffraction. The spinel phase was first observed after 10 h of miling and its formation was completed after 20 h in case of the MnCO3 - α-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 400oC for 4 h led to formation of the MnFe2O4 crystaline phase in case of the mixture of MnCO3 and α-Fe2O3, but in MnO2 - α-Fe2O3 case thermal treatment at temperatures of 400 oC and higher leads to formation of (Mn,Fe)2O3 and separation of Mn2O3 and Fe2O3..

Keywords

Manganese ferrite, Nanocrystalline materials, Mechano-synthesis.

Submitted at: Jan. 19, 2006
Accepted at: Jan. 26, 2006

Citation

P. OSMOKROVIC, C. JOVALEKIC, D. MANOJLOVIC, M. B. PAVLOVIC, Synthesis of MnFe2O4 nanoparticles by mechano chemical reaction, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 1, pp. 312-314 (2006)