Physical-Chemistry Study of a New Zr-Doped Babetio3 System

Abstract

A series of new type of lead-free ceramics Ba 0.095 Be 0.05 Ti 1-x Zr x O 3 (BBTZx) were prepared using the sol-gel method. X-ray diffraction results show that all powders crystallize in a perovskite-type phase, with the diffraction peaks of the BBTZ x powders shifting toward the smaller 2θ with increasing Zr content. On the other hand secondary phases (ZrO 2 ) were not detected in the diffractograms and the results of fluorescence spectroscopy measurements showed an increase in atomic percent of zirconium and a decrease of that of titanium, showing the incorporation of Zr ions in the BBT in place of Ti ones. The phase transition from tetragonal to cubic phase (T-C) was determined with the help of a new method based on the study of the thermal behavior of Cole-Cole diagrams (ε'' vs ε').