厚度模式下PVDF-TrFE共聚物材料常数的频散和场依赖性

ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI:10.1109/ISAF.1996.598186

S. Sherrit, J. Haysom, H. Wiederick, B. Mukherjee, M. Sayer

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引用次数: 6

摘要

一组PVDF-TrFE共聚物厚度谐振器的特性是频率和直流偏置的函数。分析了阻抗谱中的前六个共振峰，以确定复合弹性常数、压电常数和介电常数的频率色散程度。将材料常数中的色散建模为频率f的多项式，可以很好地拟合1-30 MHz频率范围内的数据。然后通过分析基波谐振作为直流偏置场的函数来测试样品的非线性。PVDF-TrFE样品的场依赖性比软PZT样品小得多。

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Frequency dispersion and field dependence in the material constants of PVDF-TrFE copolymers in the thickness mode

A set of thickness resonators of PVDF-TrFE copolymer have been characterized as a function of the frequency and DC bias. The first six resonance peaks in the impedance spectra were analyzed to determine the degree of frequency dispersion in the complex elastic, piezoelectric, and dielectric constants. Modeling the dispersion in the material constants as a polynomial in the frequency f produced an excellent fit to the data over the 1-30 MHz frequency range. The samples were then tested for non-linearity by analyzing the fundamental resonance as a function of a DC bias field. The field dependence of the PVDF-TrFE samples was much smaller than for comparable samples of a soft PZT.

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ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics

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