Synthesis, characterization of Sr-Gd nanocomposites doped with zirconium possessing electrical and optical properties

Abstract

We report here, a set of newly synthesized perovskite oxide nanomaterials that has been prepared through co precipitation method. Primary objective is synthesis of strontium-gadolinium nanocomposites doped with appropriate different concentrations of zirconium and investigation of their various electrical and optical properties. The composite materials were prepared by co precipitation method with general composition of Sr0.5 Gd0.3 (ZrO2) x moles, thus obtained hybrid nanomaterials were calcinated, characterized by XRD, FT-IR, UV-Vis spectroscopy and SEM. Here we have doped ZrO2 to Strontium-Gadolinium perovskite hybrid nanooxide multicomponent pure isolated material with different concentrations (1-5 molar %). The dielectric constants of the pelletalized samples have been examined at room temperature. The precursor material for the synthesis is strontium carbonate and gadolinium chloride which were reduced in presence of surfactant triethanol amine (TEA). The aqueous mixture of reddish brown coloured hybrid metal hydroxides are filtered, washed with ethanol-water mixture (1:9 volume) to remove any impurities present with the precipitate, the precipitate is dried at 50-100°C, further heat treated at 650-750°C and obtained pure nanocomposite. Scanning electron microscopic studies revealed that the doped ZrO2 grain size was 30-50nm in diameter and it’s over layer is 90% optically transparent. XRD pattern demonstrated the formation of tetragonal zirconia and dopant addition considerably does not affect the crystal structure. Higher dielectric constants were obtained with larger grain size of the hybrid nanocomposites.