This study proposes a new model that couples the piezoelectric and electrostrictive behavior to minimize the polarization power of composite polymer. The development of this model is capable to predict the energy harvesting abilities of an electrostrictive composite. To improve the dielectric permittivity of electrostrictive polymer, the particles of PZT have been incorporated in order to increase the conversion efficiency of the composite. Dielectric characterization tests showed an increase in dielectric permittivity by a factor of 4.5 compared to pure polymer. Experimental measurements of harvested power validate the analytical model and demonstrate a good correlation between the two data. An equivalent of an electrical scheme has been developed, which allows modeling the two behaviors. The harvested power density under low frequency at 2% of strain can reach 0.30 μW/cm³ for 33% of PZT without the polarization field, including the conversion efficiency becomes higher. The energy harvester property of this material composite has excellent potential for several self‐powered applications such as wireless sensor networks and the internet of things.

中文翻译：

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通过压电效应通过新方法改善电致伸缩复合材料的能量转换：建模和实验

这项研究提出了一个新的模型，该模型耦合了压电和电致伸缩行为，以最小化复合聚合物的极化功率。该模型的开发能够预测电致伸缩复合材料的能量收集能力。为了提高电致伸缩聚合物的介电常数，已掺入PZT颗粒以提高复合材料的转化效率。介电特性测试表明，与纯聚合物相比，介电常数提高了4.5倍。采集的功率的实验测量值验证了分析模型，并证明了这两个数据之间的良好相关性。已经开发出等效的电气方案，该方案可以对两种行为进行建模。对于没有极化场的33％的PZT，0.30μW/ cm ³包括转换效率变得更高。这种材料复合材料的能量收集器特性对于无线传感器网络和物联网等几种自供电应用具有极好的潜力。