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铁电陶瓷PZT的实验本构研究
引用本文:李长青,方岱宁.铁电陶瓷PZT的实验本构研究[J].力学学报,2000,32(1):34-41.
作者姓名:李长青  方岱宁
作者单位:清华大学工程力学系,北京,100084
基金项目:国家自然科学基金!19672026
摘    要:用低频高压电源和液压加力架实验研究了力电载荷下铁电陶瓷软性PZT(P-51)的单轴应力应变关系,在不同压应力下的电滞回线和蝶曲线,实验发现随着压应力的增加。PZT的铁电特性发生很大的变化,尝试用电畴来解释PZT在不同压力电性的变化规律和退极化效应,在本实验中,我们很好的解决了测试材料高压性能中常出现的绝缘问题和电弧放电问题,获得了比较系统的实验结果。

关 键 词:非线性本构变形测量  铁电陶瓷  电机械载荷  PZT

EXPERIMENTAL STUDY ON THE CONSTITUTIVE BEHAVIOR OF A FERROELECTRIC CERAMIC
Li Changqing,Fang Daining.EXPERIMENTAL STUDY ON THE CONSTITUTIVE BEHAVIOR OF A FERROELECTRIC CERAMIC[J].chinese journal of theoretical and applied mechanics,2000,32(1):34-41.
Authors:Li Changqing  Fang Daining
Abstract:In this investigation, the mechanical-electric coupled behavior of a PZT ferroelectricceramic was experimental observed. The sample is isolated from the test frame and the high voltagearcing were prevented effectively by the setup which promotes the precision of the experimentalresults and makes the systemic experimental results available. With a high voltage amplifier and aservo-hydraulic test frame, the strain-electric-field and electric-displacement-electric-field hysteresisloops of the soft PZT ceramic at different compressive stress levels were measured, showing thatthe properties of the PZT ceramic is the function of the compressive stress. The stress-strainrelationship was also experimentally examined. We try to explain the experimental results interms of the domain-switching theory.
Keywords:nonlinear deformation measuremant  electric-mechanical loading  Ferroelectric Ceramic
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