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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Influence of mobile 90 degrees domains on the complex elastic modulus of PZT ceramics
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Influence of mobile 90 degrees domains on the complex elastic modulus of PZT ceramics

机译：90度移动畴对PZT陶瓷复弹性模量的影响

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Measurements of the complex elastic Young's modulus of PZT ceramics as a function of the frequency of a triangular switching electric field and of an ac dynamic mechanical stress were performed. The results show that the electrostrictive character of the ceramics provides a complex elastic Young's modulus, which depends on the 90 degrees domains reorientation velocity which, in turn, is driven by the low-frequency switching electric field. This dependence has a relaxational character with a tau = 30 s relaxation time. For a given frequency of the switching electric field, the behaviour of Young's modulus as a function of the frequency of the mechanical stress is quite similar to that corresponding to point defects that are pinning the ferroelectric 90 degrees immobile domain walls: it is relaxational with a relaxation time tau = 0.04 s. [References: 21]
机译：进行了PZT陶瓷的复弹性杨氏模量随三角开关电场频率和ac动态机械应力的变化的测量。结果表明，陶瓷的电致伸缩特性提供了复杂的弹性杨氏模量，这取决于90度畴的重新定向速度，而定向速度又是由低频开关电场驱动的。这种依赖性具有tau = 30 s松弛时间的松弛特性。对于给定的开关电场频率，杨氏模量作为机械应力频率的函数的行为与对应于钉扎铁电90度固定磁畴壁的点缺陷的行为十分相似：弛豫时间tau = 0.04 s。 [参考：21]

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