铁电陶瓷PZT的实验本构研究  

EXPERIMENTAL STUDY ON THE CONSTITUTIVEBEHAVIOR OF A FERROELECTRIC CERAMIC

作　　者：李长青[1] 方岱宁[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《力学学报》2000年第1期34-41,共8页Chinese Journal of Theoretical and Applied Mechanics

基　　金：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形曲线．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在不同压应力下铁电性的变化规律和退极化效应．在本实验中，我们很好地解决了在测试材料高电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．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.

关 键 词：非线性本构变形测量 铁电陶瓷 电机械载荷 PZT 

分 类 号：TM221[一般工业技术—材料科学与工程]