Abstract

Abdelhalim Elbasset^1,2*, Lamiae Mrharrab², Salaheddine Sayouri², Farid Abdi¹ and Taj-Dine Lamcharfi¹

DOI : http://dx.doi.org/10.13005/ojc/320641

A series of new type of lead-free ceramics Ba_0.095Be_0.05Ti_1-xZr_xO₃ (BBTZ_x) 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 (ZrO₂) 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’).

Ceramics Ba0.095Be0.05Ti1-xZrxO3; Dielectric; Cole-Cole diagrams (ε’’ vs ε’); Curie temperature (Tc)

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