The optic and dielectric properties of CuO deposited barite pigments

Abstract

The CuO deposited barite pigments (CBP) were obtained by direct deposition method. Optic and dielectric properties of nanocomposites were investigated. Hence, the prepared pigments were structural scanning electron microscope (SEM). The optic properties of pigments were evaluated with ultraviolet–visible spectrophotometer (UV-Vis). The scanning electronic microscopy results show that barite was coated with CuO uniformly. The UV-Vis results show that CuO deposited barite pigments (CBP) have high ultraviolet shielding performance. Furthermore CuO deposited barite pigments (CBP) exhibited UV-Vis reflectance than those of pure-CuO. Furthermore, the conductivity of barite flakes increased with the coating of CuO nanoparticles. The dielectric properties of CuO deposited barite pigments were determined in the frequency range of 8.2–12.4 GHz via vector network analyzer and the electromagnetic absorption properties of nanocomposite was determined and calculated by using these dielectric values (permittivity). CuO deposited barite/epoxy nanocomposite (mass ratio is 3:10) with 2 mm thickness showed a minimum reflection loss of -9 dB at 12.25 GHz frequency. Furthermore, the conductivity of barite flakes increased with the coating of CuO nanoparticles.