低滞后高线性的大位移压电陶瓷微结构调控及其性能研究

项目名称： 低滞后高线性的大位移压电陶瓷微结构调控及其性能研究

项目编号： No.U1330119

项目类型： 联合基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 曾江涛

作者单位： 中国科学院上海硅酸盐研究所

项目金额： 82万元

中文摘要： 低滞后、高线性及大位移压电陶瓷是自适应光学等高精度定位系统的关键材料，由于压电陶瓷的滞后、线性及位移均有不同的物理机制，且相互制约，在同一种材料中实现这三种材料特性的有机结合具有相当的难度，因此对此类材料的研究是国际上的前沿及难点课题。本项目针对这类高性能压电陶瓷开展研究，研究不同组分、晶体结构的压电陶瓷的本征及非本征压电效应；研究点缺陷、电畴组态及晶粒晶界等微结构对陶瓷压电性能及滞后的影响。通过以上的研究，从多个尺度对压电陶瓷的组分及微结构进行设计，优化三种材料参数，最终获得高性能的压电陶瓷。利用该压电陶瓷制备低滞后、高线性及大位移的多层压电驱动器，应用于国家重要工程项目。该项目的研究对于深入理解压电陶瓷多层次微结构与性能的关系，进而促进新型压电材料的开发及器件应用都有着重要的意义。

中文关键词： 压电陶瓷；低滞后；高线性；大位移；

英文摘要： Piezoelectric ceramics with low hysteresis, high linearity and large displacement are crucial for high precision positioning system such as adaptive optics. Hysteresis, linearity and displacement are originated from different mechanisms and they usually interact with each other negatively, so combination and optimization the three kinds of properties in one materials is very difficult. The research on piezoelectric ceramic with low hysteresis, high linearity and large displacement is the frontier in this field. In this project, high performance piezoelectric ceramic with low hysteresis, high linearity and large displacement are studied. The intrinsic and extrinsic piezoelectric effect in piezoelectric ceramics with different compositions and crystal structures were investigated. The effects of microstructures such as point defects, domain configuration, grain and grain boundary on the piezoelectric properties and hysteresis were also studied. High performance piezoelectric were obtained by designing composition and microstructure from different scales and optiming the three parameters. Multilayer piezoelectric actuators with low hysteresis, high linearity and large displacement were fabricated by the ceramics developed in the project, and the actuators will be used in national important project. The results of

英文关键词： piezoelectric ceramics；low hysteresis；high linearity；large displacement；