Abstract

• Nanosized Cobalt-Zinc Aluminates with the formula Co1-xZnxAl2O4 (where x = 0.00, 0.25, 0.50, 0.75 and 1.00) were prepared by solid state reaction method by using Analytical Reagent (AR) grade CoO, ZnO and Al2O3. Structural, microstructural and vibrational characteristics of the samples were studied by XRD, SEM and FTIR spectroscopy. XRD patterns showed all characteristic peaks of the spinel structure and confirmed the phase formation indicating the absence the others impurity phases. The observed peaks perfectly matched with the crystalline phase of cubic spinel structure with the identification of satndard JCPDS. The crystallite sizes were estimated by using Debye-Scherrer’s formula to examine the nanosized aluminates materials. SEM micrographs showed that the samples were cauliflower shapes and composed of agglomerated particles with poor grain boundary. FTIR spectra indicated that the stretching vibrations of divalent cations (ν1-mode) and trivalent cations (ν2-mode) of the samples. These two modes indicated that the vibrational characteristics of Co1-xZnxAl2O4.