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

Polycrystalline PbTi(1-x)(Fe0.50V0.50)(x)O-3 (0x0.12) 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.