STUDY THE EFFECT OF TEMPERATURE ON THE DIELECTRIC PROPERTIES OF BARIUM TITANTE FOR HIGH ENERGY CAPACITORS

Abstract

Barium Titanate, BaTiO3, a ferroelectric ceramic material is used as the dielectric medium in capacitors. The effect of different sintering temperatures on the ferroelectric properties was studied. BaTiO3 was synthesized through a solid-state method using Barium Carbonate BaCO3 and Titanium Oxide TiO2 as precursors. The powders were mixed in ethanol as mixing medium and zirconia balls through low energy ball milling for 24 hours. After 24 hours, the mixture was dried at 75℃ and calcined at 850℃ for two hours at a heating rate of 5℃/min. The effect of different sintering temperatures was studied. The powder obtained after calcination was sintered at 1050℃, 1100℃, and 1150℃ at the heating rate of 5/min. Characterization techniques like XRD, SEM, Raman Spectroscopy, Impedance Analyzer, and Breakdown Strength were done. The formation of the tetragonal phase was confirmed through XRD and Raman Spectroscopy. The morphology and particle size were examined through SEM. Impedance Analyzer was used to find out the dielectric constant and dielectric loss values.