Synthesis and characterization of ferroelectric bismuthtitanate (Bi4Ti3O12)

Abstract

The Lead free, Bismuth Titanate (BIT) has been synthesized by Sol-Gel method. The synthesized samples have been subjected to the structural, morphological, hysteresis measurements. The X-Ray Diffraction studies have confirmed that Bismuth Titanate (Bi4Ti3O12) have the orthorhombic phase without any impurity peak in XRD data. The SEM studies have shown the good surface morphology with varying clusters ranging from 0.5μ to 1μ. The SEM micrograph of BIT indicates that each and every clusters appearing on the surface is comprised of large no. of crystallites. The hysteresis measurement of BIT is also done to confirm the ferroelectric property of the material. The value of Pr and Ec in hysteresis loop is affected by the externally applied field for the drawing the P-E loop. For the higher field, these values are higher as compare to the lower applied electric field (at 12KV/cm2, Pr = 0.14451μC/cm2, Ec = 5.597KV/cm and at 10KV/cm2, Pr = 0.12070μC/cm2, Ec = 4.6456 KV/cm).