Enhanced electromechanical coupling in Pb(ZrTi)O3 piezoelectric composite via poly(vinylidene fluoride-trifluoroethylene) clamping,Polymer Composites

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Enhanced electromechanical coupling in Pb(ZrTi)O3 piezoelectric composite via poly(vinylidene fluoride-trifluoroethylene) clamping
Polymer Composites ( IF 4.8 ) Pub Date : 2024-01-31 , DOI: 10.1002/pc.28166
Jiahao Wang ₁ , Weimin Xia _{1,

2} , Rong Wang ₁ , Hong Pan ₁ , Xiaofang Zhang ₂

Affiliation

This study presents an advanced two-step hot-pressing process for fabricating the 1-3 type Pb(ZrTi)O₃/poly(vinylidene fluoride-trifluoroethylene) (PZT/P(VDF-TrFE)) piezoelectric composite sheets, demonstrating significant potential for nondestructive evaluation and information storage applications. The engineered columnar architecture within these composites induces a two-phase clamping effect, which, upon polarization, facilitates the elongation of PZT and suppresses its lateral vibrations, thus enhancing the electromechanical coupling effect as verified by COMSOL simulations. A notable dielectric constant of 2200 at 100 Hz and a coupling coefficient of 0.725 was achieved with specific geometric modifications to the PZT/P(VDF-TrFE) sheets. These findings suggest that P(VDF-TrFE) as a polymer matrix exceeds the performance of conventional epoxy matrices, offering a novel approach to designing 1-3 type piezoelectric composites.

中文翻译：

通过聚偏二氟乙烯-三氟乙烯夹紧增强 Pb(ZrTi)O3 压电复合材料的机电耦合

本研究提出了一种先进的两步热压工艺来制造1-3型Pb(ZrTi)O ₃ /聚(偏二氟乙烯-三氟乙烯)(PZT/P(VDF-TrFE))压电复合材料片，展示了巨大的潜力用于无损评估和信息存储应用。这些复合材料中的工程柱状结构会产生两相夹紧效应，在极化时，有利于 PZT 的伸长并抑制其横向振动，从而增强机电耦合效应，这一点已通过 COMSOL 模拟验证。通过对 PZT/P(VDF-TrFE) 片进行特定的几何修改，可实现 100 Hz 时 2200 的介电常数和 0.725 的耦合系数。这些发现表明，P(VDF-TrFE) 作为聚合物基体超越了传统环氧树脂基体的性能，为设计 1-3 型压电复合材料提供了一种新方法。

更新日期：2024-01-31

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