TITLE:
The Influence of Cu on the Dielectric Properties of NiZnFe2O4 Synthesized by Solid State Reaction Method
AUTHORS:
Sozie Y. Ali, Omer I. Eid, Mohamed A. Siddig
KEYWORDS:
Conductivity, Dielectric, Impedance, Polarization, Resistivity, XRD, UV-Vis
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.8 No.9,
September
11,
2020
ABSTRACT: The phase pure Copper Ferrite, Zinc Ferrite, and Nickel Ferrite were prepared from oxides of Ni, Cu, Zn, and Fe using traditional ceramic method. X-ray diffraction data were collected and the formation of the spinal phase structure was found. The lattice parameter was found to be 8.441 Å for ZnFe2O4, 8.35 Å for NiFe2O4, and 8.349 Å for CuFe2O4. The Ni0.4Zn0.6Fe2O4 ferrite was sintered at three different temperatures: namely 1100°C, 1200°C, and 1300°C and similar temperature control was applied to Cu0.2Ni0.2Zn0.4Fe2O4 ferrite group. The energy band gap was calculated for Ni0.4Zn0.6Fe2O4 and Cu0.2Ni0.2Zn0.4Fe2O4 and was found to be 3.657 eV and 4.889 eV, respectively. The dielectric properties were investigated over a wide range using impedance spectroscopy and were found to decrease with the increase of frequency. Similar behavior was observed with the sintering temperature. In the same manner, the electric conductivity was found to decrease with the increase of frequency and sintering temperature as well. On the other hand, the electric resistivity was found to increase with both frequency and the sintering temperature.