Abstract
A pure ferrite and epoxy samples as well as the epoxy/ferrite composites
with different 20 wt.%, 30 wt.%, 40 wt.%, and 50 wt.% weight ferrite
contents have been prepared by the chemical co-precipitation method.
AC-conductivity and dielectric properties such as the dielectric
constant and dielectric loss of the prepared samples have been studied.
The obtained results showed that the samples had a semiconductor
behavior. The dielectric constant of the composites has been calculated
theoretically using several models. For the composite sample that
contains 20 wt.% of ferrites, these models give satisfactory
compliance, while for the composite samples with a higher percentage of
nanofillers, more than 30 wt.% theoretical results do not coincide with
experimental data. The investigated polymer has very low conductivity,
so this type of polymer can be useful for high-frequency applications,
which can reduce the losses caused by eddy current. Thus, the prepared
samples are promising materials for practical use as elements of
microwave devices.
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