Structural, Electrical and Dielectric Properties of Ball-Milled Ni0.48Cuo.12Zno.4Fe2O4/ SWCNT Nanocomposites
S. E. Naina Vinodini
Department of Physics, Government City College, (A), Nayapul, Osmania University, Hyderabad, Telangana 500002, India
P. Raju
Department of Physics, Osmania University, Hyderabad, Telanana-500007, India
Receiving Date:
2017-01-18
Acceptance Date:
2017-02-12
Publication Date:
2017-03-08
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Abstract
Nanocomposites of Ni?.??Cu?.??Zn?.?Fe?O? with 1–5 wt.% SWCNTs were prepared by means of the high energy ball-milling method combined with the solid-state mixing method. Structural and electrical characteristics of the prepared nanocomposites were studied via X-ray diffraction and impedance spectroscopy methods. As revealed via XRD study, only single-phase cubic spinel ferrite phase was observed without any secondary phases; thus, it can be concluded that incorporation of SWCNTs into the ferrite matrix does not affect crystal structure of ferrite. Electrical conductivity increases in the samples with increase in content of SWCNTs due to the formation of conductive channels in the composites. Dielectric constant decreases with increasing frequency, while higher content of SWCNTs contributes to the increase in dielectric characteristics due to the presence of interfacial polarization. Enhanced electrical and dielectric properties reveal the contribution of SWCNTs into improvement of functional properties of NiCuZn ferrites.
Keywords:
NiCuZn ferrite; Single-walled carbon nanotubes (SWCNTs); Spinel ferrite; Ball milling; Nanocomposites; X-ray diffraction; Dielectric properties; AC conductivity.
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