本文从压电学的基本定义出发，推导出两相系0—3型连通性复合压电材料的压电应变常数表达式，进一步修正了T。
This paper deducts the piezo-constant expression of 0-3 type connectivity according to the basic definition of piezoelectricity, and amends the flaw of T.
随着极化电场的升高，PVDF压电薄膜的压电应变系数升高，介电常数升高，介电损耗降低。
The piezoelectric strain coefficient and the dielectric constant of PVDF films increased, and the dielectric loss decreased with the increasing of the polarization field.
随着极化电场的升高，PVDF压电薄膜的压电应变系数升高，介电常数升高，介电损耗降低。
The piezoelectric strain coefficient and the dielectric constant of PVDF films increased, and the dielectric loss decreased with the increasing of the polarization field.
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