High Energy Storage Density and Impedance Response of PLZT2/95/5 Antiferroelectric Ceramics.

Bi Li,Jie Luo,Qiuxiang Liu,Xingui Tang,Wenhua Li,Tianfu Zhang,Yanping Jiang

doi:10.3390/ma10020143

Abstract

(Pb0.97La0.02)(Zr0.95Ti0.05)O3 (PLZT2/95/5) ceramics were successfully prepared via a solid-state reaction route. The dielectric properties were investigated in the temperature region of 26–650 °C. The dielectric diffuse anomaly in the dielectric relaxation was found in the high temperature region of 600–650 °C with increasing the measuring frequency, which was related to the dynamic thermal process of ionized oxygen vacancies generated in the high temperature. Two phase transition points were detected during heating, which were found to coexist from 150 to 200 °C. Electric field induced ferroelectric to antiferroelectric phase transition behavior of the (Pb0.97La0.02)(Zr0.95Ti0.05)O3 ceramics was investigated in this work with an emphasis on energy storage properties. A recoverable energy-storage density of 0.83 J/cm3 and efficiency of 70% was obtained in (Pb0.97La0.02)(Zr0.95Ti0.05)O3 ceramics at 55 kV/cm. Based on these results, (Pb0.97La0.02)(Zr0.95Ti0.05)O3 ceramics with a large recoverable energy-storage density could be a potential candidate for the applications in high energy-storage density ceramic capacitors.

Highlights

Electrical capacitors display an extremely high powder density but their energy storage density needs further improvement [1,2,3,4]
These results demonstrated that the (Pb0.97 La0.02 )(Zr0.95 Ti0.05 )O3 ceramics may be quite promising candidates for dielectrics in high energy density electrical capacitors due to the reversible electric field-induced FE to AFE phase transition
PLZT2/95/5 ceramics were successfully prepared by a conventional mixed oxide solid-state reaction method

Summary

Introduction

Electrical capacitors display an extremely high powder density but their energy storage density needs further improvement [1,2,3,4]. Antiferroelectric (AFE) ceramics are promising candidates for dielectrics in high energy density electrical capacitors due to the reversible electric field-induced. The FR phase transforms into a cubic paraelectric (PC ) phase (PE) on heating above 231 ◦ C [11] This phase transition of AFE to FE can be induced by varying the temperature [12], electric field [13] or hydrostatic pressure [14]. The recoverable energy-storage density calculated from hysteresis loops reached about 0.83 J/cm and efficiency of 70% These results demonstrated that the (Pb0.97 La0.02 )(Zr0.95 Ti0.05 )O3 ceramics may be quite promising candidates for dielectrics in high energy density electrical capacitors due to the reversible electric field-induced FE to AFE phase transition

Experimental Procedure

Results and Discussion

Conclusions