Structure, dielectric, and optical properties of PbTi(1−x)(V0.50Fe0.50)xO3 perovskite ceramics

Abstract

Polycrystalline PbTi(1−x)(Fe0.50V0.50)xO3 (0 ≤ x ≤ 0.12) ceramics have been prepared using a modified sol–gel route via conventional sintering method. Rietveld refinement of all samples XRD data are carried out with tetragonal P4mm space group. Structural analysis is revealed to decrease the tetragonality (c/a) from 1.064 (for x = 0) to 1.039 (for x = 0.12) with increasing composition. An electronic structural study perceived that the hybridizations between Pb (6s)–O (2p)–Ti (3d) orbitals are weakened with increasing substitution. Average grain size is influenced by the substituent effectively. The phase-transition temperature is found to decrease with increasing composition. The impedance study confirms that the conductivity of the samples is increased as a function of substitution and temperature. Absorption spectra have revealed the decrease of bandgap with increasing substitution. Hence, transition V and Fe ions are played an important role in modifying the relative density, conductivity, and bandgap of the PbTiO3 ceramic materials. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.