Optical and dielectric properties of ZrO2-V2O5 nanocomposites by co-precipitation calcination method

Nanocrystalline ZrO2-V2O5 composites were synthesized by co-precipitation method and calcined at 500 and 700 °C. The formation of the composite material has been confirmed by X-ray diffraction analysis. The surface morphology was determined by scanning electron microscope (SEM) and transmission electron microscope (TEM) analysis. EDAX analysis confirms equal composition of zirconium and vanadium in the lattice. Optical absorption studies reveal a very low absorption in the entire visible region for the two samples calcined at different temperatures. The dielectric constant and loss of the pelletized samples have been examined at different temperatures as functions of frequency. The higher dielectric constant and phase change at room temperature of the sample calcined at 700 °C showed that higher calcination temperatures enhanced dielectric properties.