Synthesis and characterizations of (Bi0.5Na0.5)TiO3- LiNbO3 ceramic system

Abstract

Lead free (1-x)(Bi0.5Na0.5)TiO3–xLiNbO3 ceramics were prepared by solid state reaction route taking five different compositions with x = 0.02, 0.04, 0.06,0.08 and 0.10. From XRD pattern it is confirmed that the BNT-LN single phases were formed at different LiNbO3 doping. The RAMAN pattern shows roughness or irregularity due to the data taken at high resolution. From morphological study by SEM it is found that the grains were well developed and have the dense structure. Also the grain shape changes from granular to platted with increase in concentration of LINbO3. From UV-VIS SPECTROSCOPY it is observed that the band gap increases with increase in LiNbO3 concentration. The PE-LOOP analysis shows that the remnant polarization (Pr) and coercive field (Ec) values increase with increase in concentration. The dielectric study shows that the dielectric constant increases with increase in temperature also the broadening of the peaks is observed with increase in concentration