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

Abstract:

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.

• Periodical: Materials Science Forum (Volume 589)
• Pages: 167-172
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.589.167
• Online since: June 2008
• Authors: László Trif, Nikoletta Molnár-Vörös, Gyula Tolnai, István E. Sajó, Sándor Mészáros, Erika Kálmán
• Keywords: Ceramic, Garnet, Hexaferrite, Nanoparticle, Self-Combustion, Sol-Gel (SG)

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