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In this paper, Study of temperature dependent dialectical properties of one system ceramics like BNT-BZ. Lead-free BNT-BZ ceramics were successfully prepared using the conventional mixed-oxide method. The samples were sintered for 2 hrs at temperatures lower than 1,000°C. The density of the BNT-BZ samples was at least 95% of the theoretical values. The scanning electron microscopy micrographs showed that small grains were embedded between large grains, causing a relatively wide grain size distribution. The density and grain size increased with increasing Zr concentration. A peak shift in X-ray diffraction patterns as well as the disappearance of several hkl reflections indicated some significant crystal-structure changes in these materials. Preliminary crystal-structure analysis indicated the existence of phase transition from a rhombohedral to an orthorhombic structure. The dielectric and ferroelectric properties were also found to correlate well with the observed phase transition.

Study of Temperature Dependent Dialectical Properties of One System Ceramics using BNT-BZ