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Thermal studies of magnetic spinel iron oxide in solution

D. PREDOI1,* , C. M. VALSANGIACOM1

Affiliation

  1. National Institute for Physics of Materials, P.O. Box. MG 07, 077125, Bucharest-Magurele, Romania

Abstract

Small particles of iron – based magnetic spinel oxide are technologically interesting because of their magnetic properties. The synthesis from solution, generally achieved by coprecipitation, offers some advantages: simple and rapid preparation, control of particle size and composition, various possibilities to modify the particle surface state allowing to make homogeneous and stable dispersion in liquid or solid media. This work reports the thermal studies of magnetic iron spinel oxide nanoparticles. For this study, the Fe2+-Fe3+ mixture (Fe2+/Fe3+=0.5) was introduced in an alkaline solutions of which the pH was kept constant. The influence of the particles sizes on the γ→ αFe2O3 transformation is analyzed..

Keywords

Magnetic iron spinel, Iron, Maghemite nanoparticles, Coprecipitation.

Submitted at: Nov. 14, 2006
Accepted at: June 15, 2007

Citation

D. PREDOI, C. M. VALSANGIACOM, Thermal studies of magnetic spinel iron oxide in solution, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 6, pp. 1797-1799 (2007)