Dielectric Prop
Dielectric
Properties and Magnetic Susceptibility of Mn-Zn Ferrites/Sio2 Composites
D. El Kony and S. A. Saafan
Physics Department, Faculty
of Science, Tanta University, Tanta, Egypt.
Abstract: Dielectric
properties and magnetic susceptibility were measured for four compositions of
Mn Zn ferrites ( Mn1-x Znx Fe2O4;
x = 0.8, 0.6, 0.4 and 0.2).Then composites of these ferrites with SiO2 were
prepared by mixing 25% weight of SiO2 powder with 75% weight
of each composition of the ferrite powders. The dielectric properties and
the magnetic susceptibility were measured again for the composite samples. The
results are displayed as functions of temperature and frequency for the
dielectric constant, loss tangent and AC conductivity, whereas for the magnetic
susceptibility only results at room temperature are reported. The results show
that adding silicon dioxide has significantly reduced the conductivity or in
other words increased the resistivity while the magnetic susceptibility still
have high values in the same order of magnitude. These findings may be useful
in many applications that require the reduction of eddy currents while keeping
the magnetic susceptibility in the same range.
[D. El
Kony and S. A. Saafan. Dielectric Properties and Magnetic
Susceptibility of Mn-Zn Ferrites/Sio2Composites. J Am Sci 2012;8(10):51-57].
(ISSN: 1545-1003). http://www.jofamericanscience.org. 9
Keywords: Dielectric Properties; Soft ferrites; magnetic susceptibility
