Author(s)

M. Raghasudha, D. Ravinder, P. Veerasomaiah

Department of Chemistry, Jayaprakash Narayan College of Engineering, Mahabubnagar, India.
Department of Chemistry, Osmania University, Hyderabad, India.
Department of Physics, Nizam College, Basheerbagh Osmania University, Hyderabad, India.

Co-Cr nano-ferrites, having the chemical formula CoCrxFe2-xO4 (where x = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0), were synthesized by the Citrate-gel auto combustion method. Synthesized powders were sintered at 500°C for 4 hours in an air and were characterized by XRD, SEM and EDS. XRD analysis showed cubic spinel structure of the ferrites and the crystallite sizes (D) were found in the range of 6 - 12 nm. The values of lattice parameter (a) decreased and X-ray density (dx) increased with the increase of Cr content. Scanning Electron Microscopic (SEM) studies revealed nano crystalline nature of the samples. An elemental composition of the samples was studied by Energy Dispersive Spectroscopy (EDS). The observed results can be explained on the basis of composition and crystal size.

Co-Cr Nano-Ferrites; Citrate-Gel Auto Combustion; X-Ray Diffraction; SEM; EDS

M. Raghasudha, D. Ravinder and P. Veerasomaiah, "Characterization of Chromium Substituted Cobalt Nano Ferrites Synthesized by Citrate-Gel Auto Combustion Method," Advances in Materials Physics and Chemistry, Vol. 3 No. 2, 2013, pp. 89-96. doi: 10.4236/ampc.2013.32014.