Composites of lead zirconate titanate particles in an epoxy matrix are prepared in the form of 0–3 and quasi 1–3 with different ceramic volume contents from 10% to 50%. Two different processing routes are tested. Firstly a conventional dielectrophoretic structuring is used to induce a chain-like particle configuration, followed by curing the matrix and poling at a high temperature and under a high voltage. Secondly a simultaneous combination of dielectrophoresis and poling is applied at room temperature while the polymer is in the liquid state followed by subsequent curing. This new processing route is practiced in an uncured thermoset system while the polymer matrix still possess a relatively high electrical conductivity. Composites with different degrees of alignment are produced by altering the magnitude of the applied electric field. A significant improvement in piezoelectric properties of quasi 1–3 composites can be achieved by a combination of dielectrophoretic alignment of the ceramic particles and poling process. It has been observed that the degree of structuring as well as the functional properties of the in-situ structured and poled composites enhance significantly compared to those of the conventionally manufactured structured composites. Improving the alignment quality enhances the piezoelectric properties of the particulate composites.

中文翻译：

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压电颗粒复合材料的原位极化和结构化

锆钛酸铅颗粒在环氧树脂基体中的复合材料以 0-3 和准 1-3 的形式制备，陶瓷体积含量从 10% 到 50%。测试了两种不同的加工路线。首先使用传统的介电泳结构来诱导链状粒子配置，然后在高温和高压下固化基质和极化。其次，当聚合物处于液态时，在室温下同时应用介电泳和极化的组合，然后进行后续固化。这种新的加工路线是在未固化的热固性体系中实施的，而聚合物基体仍然具有相对较高的导电性。具有不同排列度的复合材料是通过改变外加电场的大小来生产的。通过将陶瓷颗粒的介电泳排列和极化过程相结合，可以显着提高准 1-3 复合材料的压电性能。已经观察到，与传统制造的结构化复合材料相比，原位结构化和极化复合材料的结构化程度和功能特性显着提高。提高排列质量可增强颗粒复合材料的压电性能。已经观察到，与传统制造的结构化复合材料相比，原位结构化和极化复合材料的结构化程度和功能特性显着提高。提高排列质量可增强颗粒复合材料的压电性能。已经观察到，与传统制造的结构化复合材料相比，原位结构化和极化复合材料的结构化程度和功能特性显着提高。提高排列质量可增强颗粒复合材料的压电性能。