Research Article

Temperature dependents struct-optical properties of spinel type FeCr2O4 by glycine mediated combustion method

Abstract

Nanocrystalline spinel type FeCr2O4 samples were prepared by glycine mediated combustion method and the obtained samples were annealed at different temperature ranging from 300–700°C for constant interval of 6 h. The annealed FeCr2O4 samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy methods. The morphology was examined using a scanning electron microscopy (SEM) and corresponding presence of elements and homogeneous distribution were observed from EDS mapping. The XRD results reveal that the XRD diffraction peaks of the annealed FeCr2O4 were of well crystalline and correspond to the cubic crystal system. Morever, the confirmation for absence of secondary phases in the annealed samples were determined from XRD and FTIR results. The SEM result confirms the porous structure with spongy network of as-synthesized sample and after annealed, porosity content of FeCr2O4 samples were get reduced with enhance the agglomeration. EDS analysis confirms the presence of elements in the FeCr2O4 samples and corresponding homogeneous distribution of these elements were showed in EDS mapping. The crystallite size, lattice strain, lattice deformation stress and deformation energy density for annealed (300–700°C) FeCr2O4 samples were determined by three different models such as Uniform Deformation model (UDM), Uniform stress deformation model (USDM) and Uniform deformation energy density model (UDEDM) based on Williamson–Hall (W–H) plot from powder X-ray diffraction data. The results of estimated average crystallite size of annealed FeCr2O4 samples by Scherrer and W–H plot methods were compared with SEM results. It is found that the average crystallite size measured by W–H plot methods is in good agreement with Scherrer results.