Enhancing dielectric characteristics of calcium copper titanate via lattice site modification
摘要
The CaCu3Ti4O12 (CCTO) ceramics stands out as an ordered perovskite oxide with a crystalline structure of AA′3B4O12 (where A = Ca, A′ = Cu, and B = Ti) exhibiting intriguing physical properties. It exhibits a giant dielectric constant and hence attracted the attention of researchers for technological applications. Hence, in the present article, the enhancement of dielectric constant has been explored by incorporating of Sr, Zn, and Sn in the CCTO lattice. The Ca1−xSrxCu3−xZnxTi4−xSnxO12 (x = 0.000, 0.075, and 0.100) ceramics synthesized by using the solid-state reaction method and dielectric properties have been explored. The XRD patterns analysis confirms that the prepared sample belongs to a cubic structure having an Im-3 space group. The Raman scattering and FTIR spectra measurement also support the phase singularity. The compact nature of the sample was observed in the FESEM micrographs. Temperature variation dielectric characteristics have been studied from 273 to 500 K, showing increasing dielectric properties with increasing temperature. Hence, this study facilitates the exploration of giant dielectric properties of CCTO by creating chemical pressure on its lattice site and paving the way for its potential applications in energy storage and energy harvesting devices.