Development and excitation performance of lead free electronic material: Eu and Fe doped Bi0.5Na0.5TiO3 for filter application

Abstract

The polycrystalline samples with chemical formula Bi0.49Na0.49Eu0.02Ti0.98Fe0.02O3 (BENFTO-2 abbreviated ahead), Bi0.48Na0.48Eu0.04Ti0.96Fe0.04O3 (BENFTO-4 abbreviated ahead) and Bi0.47Na0.47Eu0.06Ti0.94Fe0.06O3 (BENFTO-6 abbreviated ahead) have been processed using a mixed oxide method. The refinement of XRD data suggests that all prepared materials exhibit tetragonal crystal system with perovskite structure. The surface morphology denotes a high density of grain growth without any cracks. This finding can contribute to grain and grain boundary associated with resistive and capacitive characteristics. The impedance and modulus are performed at various temperatures and frequencies in order to discern the relaxation as well conduction mechanism in these samples. The non-Debye dielectric relaxation is confirmed by the complex impedance formalism in all the composition. The activation energies are estimated from the AC conductivity versus inverse temperature according to the Arrhenius equation. The excitation of materials is investigated by application of a generated electric waveform. The application of series RC filter highlights Eu and Fe doped Bi0.5Na0.5TiO3 as a base for device engineering.