高性能KNN基无铅压电陶瓷新型相界构建和压电活性机理研究

项目名称： 高性能KNN基无铅压电陶瓷新型相界构建和压电活性机理研究

项目编号： No.51272164

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 肖定全

作者单位： 四川大学

项目金额： 99万元

中文摘要： 无铅压电陶瓷是近年国际新材料研究的前沿和热点之一。本项目选择KNN基无铅压电陶瓷材料体系，紧紧围绕"新型相界构建"与"压电活性机理"两个核心内容开展研究。重点研究如下四个关键科学问题：KNN基无铅压电陶瓷相界本征特性及新型相界设计与构建；KNN基无铅压电陶瓷压电活性机理、特别是在相界附近的压电活性机理；KNN基无铅压电陶瓷在相界附近的微结构、畴结构以及这些结构与材料性能的关联；基于新型相界构建和压电活性机理研究的高性能KNN基无铅压电陶瓷组分设计与性能调控。本项目是重要、紧迫、符合"国家目标"和"国际发展趋势"的前沿和热点研究，对无铅压电陶瓷材料和器件应用有重要意义；可望获得高性能KNN基无铅压电陶瓷自主知识产权和发明专利；发表高水平SCI收录论文10篇以上；培养博士、硕士多人。研究结果将使我国无铅压电陶瓷研究继续处于国际前列，并对我国无机非金属的压电铁电学科及相关技术发展具有重要意义。

中文关键词： 无铅压电陶瓷；碱金属铌酸盐；KNN；相界；无铅压电陶瓷压电活性机理

英文摘要： The research on lead-free piezoelectric ceramics is one of the frontiers and hotspots of advanced materials researches worldwide. Selecting KNN-based lead-free piezoelectric ceramics, the present project will focus the key fundamental scientific research work on the construction of the new phase-boundaries and the mechanism of the piezoelectricity of the ceramics. The research of the project will pay special attention to the folowing 4 key scientific issues, i. e., the intrinsic characteristic of the phase-boundaries, and the design and construction of the new phase-boundaries of KNN-based lead-free piezoelectric ceramics; the mechanism of the piezoelectricity of the KNN-based ceramics, especially the mechanism of the piezoelectricity of the ceramics in the vicinity of the phase-boundaries; the microstructure and the domain structure of the KNN-based ceramics in the vicinity of the phase-boundaries, and the correlation of the characteristic of the structures with the properties of the ceramics; and the composition design and the properties control of the KNN-based ceramics with high performance based on the researches of the construction of the new phase-boundaries and the mechanism of the piezoelectricity. The research of the project is much more important, which follows the frontiers and hotspots of the advanc

英文关键词： lead-free piezoelectric ceramics；alkaline niobates；KNN；phase boundaries；mechanism of piezoelectricity