Influence of Zr4+substitution on structural, optical and dielectric behavior of SrSn1-xZrxO3 (0.0 x 0.6) sintered ceramics

The paper studies the new compositions of SrSn1-xZrxO3 (0.0 <= x <= 0.6) sintered ceramics prepared by mixed oxide route. A detailed analysis is conducted to determine how Zr4+ doping affects the structure, microstructure, optical, and dielectric properties of the base sample. The XRD pattern revealed that the base sample shows the cubic structure along with the space group (Pbnm). The lower angle shift (200) and drop in peak intensity were attributed to Zr4+ greater ionic radius in conjunction with its smaller ionic radius. The intensity of the peak was reduced due to doping, but the structure of the crystal did not change. Images from scanning electron microscopy (SEM) showed the decreasing porosity and increasing grain size with increasing Zr4+ contents has been reported. A variety of broad, weak, and strong bands were present in the FTIR spectra, suggesting the presence of many functional groups connected. Additional evidence for the existence of metal-oxygen vibrations and the identification of other active infrared modes was supplied by the FT-IR analysis. The red color at about 683.28 nm was detected in all of the samples revealed by photoluminescence (PL) spectroscopy. An impedance analyzer was used to measure the dielectric properties of the synthesized samples. It has been discovered that the dissipation factor or tangent loss decreases with increasing frequency and Zr4+ contents. The overall obtained results modified due to the addition of Zr4+ contents which affected the structural, microstructural and dielectric properties of the ceramic samples which may be helpful for the designing of dielectric resonator antenna.