Electroceramic Composites

本项目致力于开发一类用于传感器应用的高灵敏度的压电陶瓷聚合物复合材料。由三维连接的聚合物基质和离散的陶瓷颗粒组成的复合材料因其较大的压电电压系数、柔韧性和易于制造而特别引人注目。要获得有用的比电性能，需要较高的填充物体积分数。目前用于这种类型的复合材料的制造过程由于难以在聚合物基质中结合较高含量的陶瓷填料而受到限制。该项目将开发一种新的制备工艺，以制备具有高容量压电陶瓷(钛酸铅、钛酸铅、铌酸锌)和不同压电系数的复合材料，用于各种应用。将使用常规和电晕放电极化技术来对复合材料进行电极化。还将研究偶联剂的使用对复合材料介电和压电性能的影响。

This project deals with the development of a family of piezoelectric ceramic polymer composites with high sensitivity for sensor applications. Composites consisting of three-dimensionally connected polymer matrix loaded with discrete ceramic particles are especially interesting because of their large piezoelectric voltage coefficients, flexibility, and ease of fabrication. To achieve useful piexoelectric properties, a higher volume fraction of filler is necessary. Fabrication procedures presently used for this type of composite are limited by the difficulty in incorporating higher loading of the ceramic filler in the incorporating higher loading of the ceramic filler in the polymer matrix. This project will develop a new preparation procedure to prepare composites with a high volume of piezoelectric ceramics (lead zirconate titanate, lead titanate, lead zinc niobate) and various piezoelectric coefficients for a variety of applications. Conventional and corona discharge poling techniques will be used to electrically polarize the composites. The effect of using a coupling agent on dielectric and piezoelectric properties of composites will also be investigated.