Influence of Temperature on Dielectric and Piezoelectric Behaviors of Stannate Modified Lead Zirconate Titanate Ceramics

Abstract

Phase transformation induced by temperature of stannate-modified lead zirconate titanate ferroelectric ceramics was investigated. The chosen composition is Pb_0.99Nb_0.02[(Zr_0.90Sn_0.10)_0.95Ti_0.05]_0.98O₃ which was abbreviated as PZST85/10/5–2Nb. The low temperature rhombohedral ferroelectric (F_R(LT))-high temperature rhombohedral ferroelectric (F_R(HT))-paraelectric phase (PE) sequence induced by temperature was observed in poled PZST85/10/5–2Nb ceramic by measuring the dielectric response, hysteresis loop and piezoelectric coefficient d₃₃. There was a relatively slight change of loss factor, hysteresis loop (remanent polarization, coercive field and area of loop) and piezoelectric constant d₃₃ during F_R(LT)-F_R(HT) phase transformation. Sharp maxima of dielectric constant and piezoelectric constant d₃₃ occur in F_R(HT)-PE phase transformation.

Keywords:

• ferroelectric ceramic
• PZST
• temperature
• phase transformation

Acknowledgments

This work was supported by the ‘Project of Two Hundred Person’ of China Academic Engineering of Physics (Grant No. 2008R0107), the National Science Foundation of China (Grant No. 410875095) and the Ministry of Sciences and Technology of China through 973-project (Grant No. 2009CB623306).