钛酸钡与铌酸钾钠无铅压电陶瓷研究进展

Research Progress of Barium Titanate and Potassium Sodium Niobate Lead-Free Piezoelectric Ceramics

钛酸钡(BaTiO_(3))和铌酸钾钠(K_(0.5)Na_(0.5)NbO_(3))压电陶瓷因具有环境友好、电学性能良好、居里温度较好等优势而成为国际高新技术材料研究的前沿热点,有望替代部分铅基压电陶瓷应用于国防、航空航天、通信等领域的电子器件中。本文综述了BaTiO_(3)和K_(0.5)Na_(0.5)NbO_(3)压电陶瓷材料的最新研究进展,从构造相界调控压电性能、BaTiO_(3)基压电陶瓷的材料体系设计、K_(0.5)Na_(0.5)NbO_(3)基压电陶瓷的热稳定性及改善、压电陶瓷的新型成型及烧结工艺等方面进行客观分析和总结,并展望了两种材料的未来发展趋势,为开发高性能无铅压电陶瓷提供参考。

Barium titanate(BaTiO_(3))and potassium sodium niobate(K_(0.5) Na_(0.5) NbO_(3))piezoelectric ceramics have become the forefront of international high-tech materials research due to their environmental friendliness,excellent electrical properties and proper curie temperature,and were expected to replace some lead-based piezoelectric ceramics in electronic devices in the fields of national defense,aerospace and communications,etc.In this paper,the latest research progress of BaTiO_(3) and K_(0.5) Na_(0.5) NbO_(3) piezoelectric ceramic materials was reviewed,the aspect of constructing phase boundary to regulate the piezoelectric performance,designing the material system of BaTiO_(3)-based piezoelectric ceramics,the thermal stability and improvement of K_(0.5) Na_(0.5) NbO_(3)-based piezoelectric ceramics and the new molding and sintering process of piezoelectric ceramics were analyzed and summarized objectively.Finally,future development trend of the two kinds of materials was discussed,and a reference for the development of high-performance lead-free piezoelectric ceramics was provided.