Synthesis & Characterization of 50BZT-50BCT Ferroelectric Ceramics by Combustion & Microwave Processing Routes

Abstract

50BZT-50BCT has been prepared using conventional solid state reaction route and microwave synthesis route. Calcinations were done at 1000 oC, 1100 oC and 1200 oC. Sintering was done by the two reaction routes. For conventional method the sintering was done at 1300 oC, 1350 oC and 1400 oC. For the microwave synthesis method the sintering was done at 1300 oC for 20 minutes, 30 minutes and 40 minutes. Density and porosity measurement, XRD analysis, dielectric constant and dielectric loss measurement, SEM, P-E hysteresis loop and diffusivity measurements were done. Highest density was achieved in sample conventionally sintered at 1400 oC. XRD confirmed a perovskite tetragonal structure. Dielectric measurements were done in the frequency range 1kHz to 1 MHz. It showed a diffused phase transition. Maximum dielectric constant was found at the curie temperature.