Enhancement of the Optical and Dielectric Properties at Low Frequency of (Sr 1-x Ca x ) 5 Ti 4 O 13 , (0 ≤ x ≤ 0.06) Structure Ceramics.

Low loss Ruddlesden-Popper (RP) series, i.e., (Sr 1-x Ca x ) 5 Ti 4 O 13 , 0.0 ≤ x ≤ 0.06, has been synthesized by a mixed oxide route. In this work, the substitution of Ca 2+ cation in Sr 5 Ti 4 O 13 sintered ceramics was chosen to enhance the structural, optical, and dielectric properties of the product. It was found that the Ca 2+ content has significant effects on enhancing the dielectric properties as compared to Mn and glass additions. It was observed that the relative density, band gap energy, and dielectric loss (tangent loss) increase while relative permittivity decreases along with Ca 2+ content. High relative density (96.7%), low porosity, and high band gap energy (2.241 eV) values were obtained in (Sr 1-x Ca x ) 5 Ti 4 O 13 , 0.0 ≤ x ≤ 0.06 sintered ceramics. These results will play a key role in the application of dielectric resonators.