Structural, optical, and dielectric Properties of Sr2+substituted Ba1-xSrx(Co1/2W1/2)O3 ceramics for wireless application

The solid solution of Ba1-xSrx(Co1/2W1/2)O3, (BSCWO), (0.0 <= x <= 0.60) ceramics has been prepared via conventional solid-state reaction route. In this work, the impact spawned by doping Sr2+ cation on the phase, dielectric, optical and morphological properties of (BSCWO), ceramics has been investigated with respect to the frequency range of 1-3 GHz. The X-ray diffraction patterns revealed that the base sample has a tetragonal structure, while Sr+2 doped samples exhibit orthorhombic structure. The appearances of the surface and grain size distribution of samples are analyzed using scanning electron microscope (SEM). The FTIR study confirms the presence of metal-oxygen bond and functional groups. The dielectric properties of the prepared samples were strongly dependent on the frequencies and as well as on concentration. The UV-visible absorption spectra results, the band gap energy (Eg) drops from 2.56 to 2.37 eV with an increasing the Sr2+ contents. The EDX (energy dispersive x-rays) spectroscopy corroborate the presence of Ba, Sr, Co, and W elements. We observed the lowest dielectric loss (tan = 0.092) and the highest dielectric constant (epsilon r = 51) at contents (x = 0.60), making it a promising option for wireless device applications.