Fabrication and Characterization of Zn Substituted Cu-Cr Ferrites
Fabrication and Characterization of Spinel Ferrites
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This research project is aimed to fabricate and characterize zinc substituted copper chromium spinel ferrites of compositional scheme of ZnxCu1-x Cr0.5Fe1.5O4 (Where x=0, 0.2, 0.4, 0.6, 0.8) prepared by powder metallurgical methods using 99.99% commercially available ZnO, CuO, Cr2O3 and Fe2O3 as starting material. Accurately weigh powder were ball milled and calcined for 24 hours at 1100ºC. Then the calcined powders were homogenized using A-gate motor- pestle then sintered at 900oC for 10hours. Thermal, structural, morphological, elemental, magnetic, optical and dielectric properties were car...
This research project is aimed to fabricate and characterize zinc substituted copper chromium spinel ferrites of compositional scheme of ZnxCu1-x Cr0.5Fe1.5O4 (Where x=0, 0.2, 0.4, 0.6, 0.8) prepared by powder metallurgical methods using 99.99% commercially available ZnO, CuO, Cr2O3 and Fe2O3 as starting material. Accurately weigh powder were ball milled and calcined for 24 hours at 1100ºC. Then the calcined powders were homogenized using A-gate motor- pestle then sintered at 900oC for 10hours. Thermal, structural, morphological, elemental, magnetic, optical and dielectric properties were carried out using TGA-DTA, XRD, FESEM, EDS, VSM, FTIR and LCR meter respectively. TGA-DTA data provides the optimum temperature for the fabrication of spinel ferrites and later XRD micrographs reveal the formation of single phase spinel structure showing lattice parameters increases and x-ray and bulk density decreases as Zn content increases. FESEM shows the aggregated grain growth. FTIR spectra show two prominent bands in the range of 400-800 cm-1 which confirm the formation of spinel ferrites. The dielectric loss tangent and dielectric constant (_) decreases as frequency increases.
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