The influence of cement ages on the piezoelectric constant of the composites was analyzed.
研究了水泥水化龄期对复合材料压电性能的影响，并对其机理进行了初探。
High-power piezoelectric ceramics are desirable to combine a high mechanical quality factor(Qm) with a high piezoelectric constant(d 33) and a high planar coupling factor(Kp).
大功率压电陶瓷要求材料不但在强场下有小的介质损耗，大的机械品质因数，同时兼备一定的压电常数和机电耦合系数。
This paper is to display existence and its conditions to a surface acoustic wave propogating along surface of a half-body of piezoelectric ceramics with a rotation of constant angular velocity.
对转动半无限压电陶瓷体的表面声波给出了存在性证明及其条件。
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。
An increase in grain size increases the dielectric constant, piezoelectric coefficient and hydrostatic figures of merit, which can be explained by the Okazaki space-charge theory.
晶粒尺寸增加，多孔PZ T陶瓷的介电常数、压电系数和优值增加，并可用Okazaki空间电荷理论解释晶粒尺寸对试样介电和压电性能的影响。
Theoretical results show that the piezoelectric sensing sensitivity of PVDF film is proportional to film thickness and inversely proportional to the elasticity constant S.
理论分析表明PVDF薄膜的声学灵敏度与膜的厚度和膜的弹性刚性系数成正比。
Theoretical results show that the piezoelectric sensing sensitivity of PVDF film is proportional to film thickness and inversely proportional to the elasticity constant S.
理论分析表明PVDF薄膜的声学灵敏度与膜的厚度和膜的弹性刚性系数成正比。
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