铋基钙钛矿无铅压电陶瓷的性能调控和物理机制研究

项目名称： 铋基钙钛矿无铅压电陶瓷的性能调控和物理机制研究

项目编号： No.10804130

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 杜红亮

作者单位： 中国人民解放军空军工程大学

项目金额： 18万元

中文摘要： 随着人类可持续发展的要求，无铅压电陶瓷成为当今铁电领域的研究热点。经过三年的研究，本研究项目取得一些具有创新性的成果：1. 提出并且发展了(K0.5Na0.5)NbO3-BiMeO3基无铅压电陶瓷，克服了纯的(K0.5Na0.5)NbO3陶瓷压电性能低的缺点；2.发展了一种新型的高温无铅弛豫铁电材料。德国学者Vladimir V. Shvartsman在Journal of the American ceramic society论文中评价该材料是制备高温电容器的优秀候选材料；3.解决了(K0.5Na0.5)NbO3基陶瓷压电性能温度稳定差的缺点，促进了(K0.5Na0.5)NbO3基无铅压电陶瓷的实用化；4. 发现了一种预测(K0.5Na0.5)NbO3基陶瓷组分具有高性能的方法，该项研究成果在第十一届国际材联亚洲材料大会（11th IUMRS International Conference in Asia）上获得优秀青年学者论文奖；5.发现了一种新型的透明无铅电光陶瓷。本研究项目解决了（K0.5Na0.5)NbO3陶瓷存在的一些关键问题，促进了无铅压电陶瓷的实用化进程。

中文关键词： 无铅压电陶瓷；铋基；性能调控；物理机制

英文摘要： With the requirements of sustainable development, lead-free piezoelectric ceramics have been become a hot topic in ferroelectric field. Then main conclusions with innovative features obtained from experimental results and analysis are as follows: (1) New (K0.5Na0.5)NbO3-BiMeO3 solid solutions were developed for achieving high piezoelectric properties. (2) (K0.5Na0.5)NbO3-based relaxor ferroelectrics can be regarded as an alternative direction for the development of high temperature lead-free relaxor ferroelectrics. Vladimir V. Shvartsman commented that (K0.5Na0.5)NbO3-based relaxor ferroelectrics is quite attractive for high-temperature capacitors in journal of the American ceramic society. (3) A good temperature stability of electrical properties was found in this project. Excellent temperature stability of electrical properties accelerates the practical applications of (K0.5Na0.5)NbO3-based ceramics. (4) The empirical relationship between compositions with the polymorphic phase transition near room temperature and the valence of A-site ions in non-KNN end member in KNN systems was found. The results won the Excellent Paper Award For Young Scientists in 11th IUMRS International Conference in Asia. (5) A new transparent lead-free electro-optic ceramics based (K0.5Na0.5)NbO3 ceramics was found in this project. This research project solved some key problems of (K0.5Na0.5)NbO3 ceramic and promoted the practical applications of (K0.5Na0.5)NbO3-based ceramics.

英文关键词： Lead-free piezoelectric ceramics; Bi-based; Control of properties; Physics mechanisms