PbLa(Zr,Sn,Ti)O3反铁电陶瓷在脉冲电场下的极化与相变行为

在实际应用中,反铁电陶瓷常处于快速变化的脉冲电场下,而传统电滞回线测量时所施加的电场变化速率较慢,并不能真实反映反铁电陶瓷实际应用时的极化和相变行为.本研究建立了反铁电陶瓷脉冲电滞回线测试平台,研究了Pb0.94La0.04(Zr0.52Sn0.48)0.84Ti0.16]O3反铁电陶瓷在微秒级脉冲电场下的极化和相变行为.研究结果表明,反铁电陶瓷在微秒级脉冲电场下可以发生相变,但其极化强度降低,正向相变电场变高,反向相变电场变低,从而导致其储能特性发生了显著的变化.因此,低频电滞回线并不能真实反映反铁电陶瓷在脉冲电场下的性能,脉冲电滞回线对其应用具有更重要的参考价值.

Polarization and phase transition behavior of PbLa(Zr,Sn,Ti)O3 antiferroelectric ceramics under pulse electric field

In real applications,antiferroelectric(AFE)ceramics are usually subjected to a pulse electric field with fast rising or falling speed.In the measurement of hysteresis loop at low frequency,the applied electric field has a low changing rate.Thus,the obtained results cannot reveal the polarization nor phase transition of AFE ceramics in real applications.In the present work,a platform to measure the pulse hysteresis loop is developed and the polarization and phase transition of Pb0.94La0.04(Zr0.52Sn0.48)0.84 Ti0.16]O3(PLZST)AFE ceramics under pulse electric field on aμs scale are investigated.The obtained results indicate that the phase transition can be induced by pulse electric field.However,the maximum polarization decreases,the forward transition field increases and the backward one decreases,resulting in the variation of energy storage performance.Thus,the hysteresis loop at low frequency cannot reveal the performance of AFE ceramics under the action of a pulse electric field.The pulse hysteresis loop is of great significance in real applications.