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Analytical studies of ferrite nanoparticles

L. G. TOMA1,* , R. M. ION1,2

Affiliation

  1. Valahia University of Targoviste, Multidisciplinary Research Institute for Sciences and Technologies, 2 Carol I street, 130024, Targoviste, Romania
  2. ICECHIM, Analytical Department, Bucharest-060021, Romania

Abstract

Nanomaterials based on ferrites represent a very attractive area to explore. The results show that the magnetic properties were improved by using dispersed nanoparticles, as ferrites. Nanometer-sized magnetic particles hosted on network material were successfully prepared by a simple chemical process. The aim of this work was to prepare ultra fine cobalt ferrite by a wet chemical method. Ammonium oxalate and a solution of hydrazine hydrate were mixed and stirred under argon atmosphere at 80o C to provide ammonium oxalate hydrazinate. All the produced spherical beads have presented metallic particles (NiFe2O4, CuFe2O4, CoFe2O4, or MnFe2O4), either as isolated particles or agglomerates, located on their external and internal (within pores). Low temperature synthesis of such materials has been found to yield to ultra fine particles with unique and unusual particle size by means of chemical stoichiometry reaction. The energy dispersive X-ray spectroscopy (XRF) allowed the observation of submicron particles. Also, for characterization, we have used chemical analyses, X-ray diffraction (XRD), UV-Vis absorbance spectroscopy, thermal analyses TG-DTG, Mossbauer spectroscopy and electron microscopy. The analyses show the presence of a homogenous compound with characteristic properties and well crystallized spinel structure, with formula MeFe2O4 (Me = Co, Mn, Ni)..

Keywords

Composites nano materials, Spinel ferrite nano particles, Physical, chemical and structural properties of (Co, Mn, Ni)Fe2O4.

Submitted at: Sept. 7, 2010
Accepted at: Oct. 14, 2010

Citation

L. G. TOMA, R. M. ION, Analytical studies of ferrite nanoparticles, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 10, pp. 2113-2118 (2010)