Structural, Dielectric, and Magnetic Studies on Electrospun Magnesium Ferrite-Polyvinylidene Fluoride Core–Shell Composite Fibers
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Date
2014-07-08T06:32:38Z
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Abstract
The sub-micron (of the order of 150 nm) thick core–shell composite fibers of magnesium ferrite-polyvinylidene
fluoride are prepared by electrospinning. The loading of magnesium ferrite is varied from 1 to 10 wt%. The study results by
X-ray diffraction, scanning electron microscope, and infra-red spectroscopy indicate the formation of core–shell structure
and an enhancement in the amount of b-phase compared to a-phase in the polyvinylidene fluoride. The particle size of the
magnesium ferrite in the fiber is evaluated to be 30 nm. The low frequency dielectric studies indicate that the addition of
the magnesium ferrite increases the polarization resulting in the increase in the dielectric constant but decreases the
dielectric loss. The magnetization measurements indicate an increased value of coercivity compared to bulk due to the
nano-size of the magnesium ferrite. The microwave absorption at the ferromagnetic resonance increases with the increase
in the concentration of magnesium ferrite. The resonance field is found to vary with the loading of MFO.
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Revathi, Dinesh Kumar, Chithra Lekha, Electrospinning; Polymer composites, Dielectric properties, Structural, Dielectric, and Magnetic Studies on Electrospun Magnesium Ferrite-Polyvinylidene Fluoride Core–Shell Composite Fibers, Acta Metallurgica Sinica