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Piezoelectric and mechanical properties of fatigue resistant, self-healing PZT-ionomer composites

机译：抗疲劳，自修复PZT离聚物复合材料的压电和机械性能

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摘要

Piezoelectric ceramic-polymer composites with 0-3 connectivity were fabricated using lead zirconium titanate (PZT) powder dispersed in an ionomer (Zn ionomer) and its reference ethylene methacrylic acid copolymer (EMAA) polymer matrix. The PZT-Zn ionomer and PZT-EMAA composites were prepared by melt extrusion followed by hot pressing. The effects of poling conditions such as temperature, time and electric field on the piezoelectric properties of the composites were investigated. The experimentally observed piezoelectric charge coefficient and dielectric constant of the composites were compared with theoretical models. The results show that PZT-Zn ionomer composites have better piezoelectric properties compared to PZT-EMAA composites. The static and fatigue properties of the composites were investigated. The PZT-Zn ionomer composites were found to have excellent fatigue resistance even at strain levels of 4%. Due to the self-healing capabilities of the ionomer matrix, the loss of piezoelectric properties after high strain tensile cyclic loading could be partially recovered by thermal healing.
机译：使用分散在离聚物（Zn离聚物）中的钛酸铅锆（PZT）粉末及其参比乙烯甲基丙烯酸共聚物（EMAA）聚合物基质，制备了具有0-3连接性的压电陶瓷-聚合物复合材料。通过熔融挤出然后热压制备PZT-Zn离聚物和PZT-EMAA复合材料。研究了温度，时间和电场等极化条件对复合材料压电性能的影响。将实验观察到的复合材料的压电电荷系数和介电常数与理论模型进行比较。结果表明，与PZT-EMAA复合材料相比，PZT-Zn离聚物复合材料具有更好的压电性能。研究了复合材料的静态和疲劳性能。发现即使在应变水平为4％时，PZT-Zn离聚物复合材料也具有出色的抗疲劳性。由于离聚物基体的自我修复能力，高应变拉伸循环载荷后压电性能的损失可以通过热修复部分恢复。

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