Abstract
Phase transformation induced by temperature of stannate-modified lead zirconate titanate ferroelectric ceramics was investigated. The chosen composition is Pb0.99Nb0.02[(Zr0.90Sn0.10)0.95Ti0.05]0.98O3 which was abbreviated as PZST85/10/5–2Nb. The low temperature rhombohedral ferroelectric (FR(LT))-high temperature rhombohedral ferroelectric (FR(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 FR(LT)-FR(HT) phase transformation. Sharp maxima of dielectric constant and piezoelectric constant d33 occur in FR(HT)-PE 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).