Excellent Energy Storage and Charge-discharge Performances in PbHfO3 Antiferroelectric Ceramics

摘要

Single phase PbHfO3 antiferroelectric ceramics were prepared via rolling process. It is revealed that the rolling process can reduce the grain size and increase the bulk density, which lead to the enhanced breakdown strength up to 268 kV/cm versus 219 kV/cm of samples using the conventional solid-state method. As a result, high recoverable energy density of 7.6 J/cm(3) with an efficiency of 80.8 % was achieved. Meanwhile, a large current density of 1381 A/cm(2) and an ultrahigh peak power density up to 170 MW/cm(3) were observed under 250 kV/cm. In addition, unique electrical polarization response characteristics at different electric fields and temperature-induced structural phase transitions were also investigated. The energy storage performance and charge-discharge properties of PbHfO3 were first studied in this communication and all the results indicate that PbHfO3 ceramic is a promising candidate for pulse power applications.