Synthesis, Permeability and Microstructure of the Optimal Nickel-Zinc Ferrites by Sol-Gel Route
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Abstract
The optimum ferrite can be obtained through free-microstructural defects where such defects are always encountered in the conventional ferrites often caused by chemical inhomogeneity. In this study, Ni-Zn ferrite was synthesized and fabricated by means of a sol-gel route. Thermal gravimetric analysis (TGA) was used to study the thermal transforma-tion of the ferrite in air. Parts of the sol-gel powder heated at elevated temperatures were characterized by X-ray dif-fraction (XRD) method and Scanning Electron Microscopy (SEM) to reveal the crystallized single-phase and the struc-ture of the obtained ferrite. Fourier transform infrared spectroscopy (FT-IR) was assisted to investigate the structure. The microstructures of the toroidal cores were obtained at two different sintering temperatures and compared with those obtained via the classic method. In addition to that, the magnetic properties were measured. The initial magnetic permeability was found to increase with the increasing of the frequency as a result of the domain wall motions and the corresponding loss was small. Therefore, a well defined polycrystalline microstructure ferrite via an easier preparation methodology as compared to the classic method is obtained.
- E. E. Sileo, R. Rotelo, and S. E. Jacobo, “Nickel-zinc ferrites prepared by the citrate precursor method,” Physica B: Condensed Matter, Vol. 320, pp. 257–260, 2002.
- H. E. Zhang, B. F. Zhang, G. F. Wang, X. H. Dong, and Y. Gao, “The structure and magnetic properties of Zn1?xNi xFe2O4 ferrite nanoparticles prepared by sol-gel auto- combustion,” Journal of Magnetism and Magnetic Materials, Vol. 312, pp. 126–130, 2007.
- J. Azadmanjiri, “Structural and electromagnetic properties of Ni-Zn ferrites prepared by sol-gel combustion method,” Materials Chemistry and Physics, Vol. 109, pp. 109–112, 2008.
- M. Yu, J. Liu, and S. Li, “Fabrication and characterization of highly ordered Ni0.5Zn0.5Fe2O4 nanowire/tube arrays by sol-gel template method,” Journal of University of Science and Technology Beijing, Vol. 14, pp. 469–472, 2007.
- S. Zahi, M. Hashim, and A. R. Daud, “Synthesis, magnetic properties and microstructure of Ni-Zn ferrite by sol–gel technique,” Journal of Magnetism and Magnetic Materials, Vol. 308, pp. 177–182, 2007.
- Y. P. Fu, C-H. Lin, and C-W. Liu, “Preparation and magnetic properties of Ni0.25Cu0.25Zn0.5 ferrite from microwave-induced combustion,” Journal of Magnetism and Magnetic Materials, Vol. 283, pp. 59–64, 2004.
- M. Jalaly, M. H. Enayati, F. Karimzadeh, and P. Kameli, “Mechanosynthesis of nanostructured magnetic Ni-Zn ferrite,” Powder Technology, Vol. 193, pp. 150–153, 2009.
- T. T. Ahmed, I. Z. Rahman, and M. A. Rahman, “Study on the properties of the copper substituted Ni-Zn ferrites,” Journal of Materials Processing Technology, Vol. 153– 154, pp. 797–80, 2004.
- A. Goldman, “Modern ferrite technology,” Van Nostrand Reinhold, New York, pp. 121–12, 1990.