Preparation and Characterization of Nanostructured Ferrite Materials by a Nitrate-Citrate Self-Combustion Sol–Gel Synthesis

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New chemical synthesis procedure for the preparation of nickel zinc doped W-type hexagonal barium ferrite and aluminium doped yttrium-iron garnet nanoparticles has been developed, using the nitrate-citrate sol-gel auto-combustion method (NCSAM). The crystalline phase attributes, microstructure, morphology, specific surface area, Curie temperature (TC), permeability, thermal behavior of the as-burnt phase and the heat treated powders were characterized using XRD, SEM, FT-IR, BET, TG-DTA and AC magnetic permeability with frequency shift. In the case of the hexaferrite, the pure W-type ferrite phase is formed during 4 hour annealing at a temperature of 1200 °C, the garnet phase is formed at a lower temperature i.e. 1000 °C. Furthermore it has been confirmed, that the AC magnetic permeabilities of the garnet materials are strongly depending on the chemical composition.

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Edited by:

P.J. Szabó, T. Réti, T. Czigány

Pages:

167-172

DOI:

10.4028/www.scientific.net/MSF.589.167

Citation:

L. Trif et al., "Preparation and Characterization of Nanostructured Ferrite Materials by a Nitrate-Citrate Self-Combustion Sol–Gel Synthesis", Materials Science Forum, Vol. 589, pp. 167-172, 2008

Online since:

June 2008

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$35.00

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