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Journal of Materials
Volume 2016 (2016), Article ID 7518468, 7 pages
Research Article

Composites: Preparation and Magnetodielectric Properties

1Department of Physics, BVRIT Hyderabad College of Engineering for Women, Hyderabad, India
2Department of Physics, GITAM Institute of Technology, GITAM University, Visakhapatnam, India
3Department of Physics, Osmania University, Hyderabad, India

Received 27 April 2016; Accepted 22 August 2016

Academic Editor: Eric Guibal

Copyright © 2016 T. Ramesh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Cobalt ferrite (CoFe2O4) and silica (SiO2) nanopowders have been prepared by the microwave hydrothermal (M-H) method using metal nitrates as precursors of CoFe2O4 and tetraethyl orthosilicate as a precursor of SiO2. The synthesized powders were characterized by XRD and FESEM. The () (CoFe2O4) + SiO2 (where = 0%, 10%, 20%, and 30%) composites with different weight percentages have been prepared using ball mill method. The composite samples were sintered at 800°C/60 min using the microwave sintering method and then their structural and morphological studies were investigated using X-ray diffraction (XRD), Fourier transformation infrared (FTIR) spectra, and scanning electron microscopy (SEM), respectively. The effect of SiO2 content on the magnetic and electrical properties of CoFe2O4/SiO2 nanocomposites has been studied via the magnetic hysteresis loops, complex permeability, permittivity spectra, and DC resistivity measurements. The synthesized nanocomposites with adjustable grain sizes and controllable magnetic properties make the applicability of cobalt ferrite even more versatile.