Microwave Dielectric Properties and Far‐Infrared Reflectivity Characteristics of the CaTiO3–Li(1/2)−3xSm(1/2)+xTiO3Ceramics

Abstract

Microwave dielectric properties and far‐infrared reflectivity spectra of the 0.3CaTiO3–0.7Li(1/2)−3xSm(1/2)+xTiO3 ceramics were investigated as a function of Sm3+ substitution (0.0 ≤x≤ 0.12). The dielectric constant decreased as the Sm3+ substitution increased. The Q×fvalue increased, up to a solid‐solution limit at x= 0.11, because of the change of vibration modes between the A‐site cation and the TiO6 octahedron, and then decreased because of the formation of a secondary phase (Sm2Ti2O7). On the analysis of the far‐infrared reflectivity spectra, in the 50–4000 cm−1 range, the change of the dielectric loss and dielectric constant could be explained by the intrinsic factor.