Synthesis and Characterization of Nickel and Zinc Ferrites by using Urea as a fuel
R. Deivakumaran, N.Dharuman, S.K. Suresh Babu, Dr.L. John Berchmans
Department of Nanotechnology, Karunya University, Coimbatore.
Electropyrometallurgy Division, CSIR-Central Electrochemical Research Institute, Karaikudi,India
The magnetic materials are found potential applications which include high density data storage, Targeted drug therapy, Magnetic Resonance Imaging (MRI), Power generators, Magnetic sensors etc. Among the magnetic materials, spinel ferrites (AB2O4, A=M2+,B=Fe3+) are favorites for their enhanced magnetic properties which depend on their microstructure, distribution of divalent and trivalent cation in octahedral [B], tetrahedral [A] sites respectively. Nanocrystalline spinel ferrites are capable of forming mixed spinel structures of the form (Fe1-x Mx) [M1-x Fe1+x]O4 where x is inversion degree representing the cation distribution in tetrahedral and octahedral sites respectively.
Nickel Ferrite (NiFe2O4) an inverse spinel and Zinc Ferrite (ZnFe2O4) a normal spinel structure play an important role in microwave devices, cancer therapy, sensors etc. Nanostructured NiFe2O4 and ZnFe2O4 compounds are synthesized by thermal decomposition of nitrate salts of Nickel and Zinc with varying concentrations of urea as a fuel. The particle size, phase purity, crystalline structure are studied using X-ray diffraction (XRD).The average crystalline size is determined from the XRD data using Debye-Scherrer equation. The surface morphology and elemental composition are analyzed using Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS). The Fourier Transform Infrared Spectroscopy (FTIR) studies reveals the normal and inverse spinel cubic structures which determines the magnetic properties of ferrites.