| || Dielectric Properties of Nanostructured PZT Synthesised by Chemical Methods
Author : Gajbhiye, N. S.;Pandey, P. K.;George, Lyci;Kumar, Abhishek
Source : Defence Science Journal ; Vol:57(1) ; 2007 ; pp 61-68
Subject : 66 Chemical Technology
Keywords : PZT;Lead zirconate tiatanate;Nanostructured PZT;Smart materials;Ceramic powders;Ferroelectric ceramic materials;Perovskite structure;Memory devices;Ferroelectric materials;Perovskite phase;Perovskite
Abstract : In this study, the dielectric behaviour of smart material, lead zirconate tiatanate (PZT), which is important for wide industrial applications, has been explored. Two samples of nanostructured Pb(Zr0.52Ti0.48)O3 ceramic powders were prepared by hydroxide co-precipitation and aqueous solution method (water bath technique). The XRD pattern of the powder exhibited the presence of major tetragonal and minor rhombohedral crystalline phases indicating the mixed-phase composition, which is close to the morphotropic phase boundary (MPB). SEM analysis revealed good homogeneity of the materials. The plot of real part versus imaginary part of the complex impedance was observed nearly a semicircle, indicating that the samples are good dielectric materials, whose resistance decreases considerably with the increase of temperature. Similar to the normal ferroelectric materials, the dielectric constant (e) of PZT has been found to be increasing gradually with temperature and attains a maxima (emax). The detailed analysis for the shift in peak temperature and dielectric constant were carried out.