摘要
针对钛酸铋钠(Bi0.5Na0.5TiO3)基无铅压电铁电材料,提出了新型的ABO3型A位多重复合无铅压电陶瓷体系[(Bi1-x-yLax)Na1-y]0.5BayTiO3;利用传统陶瓷工艺和电子陶瓷公司生产中使用的原料,制备了该体系陶瓷;研究了该陶瓷的压电性质与微观结构。研究结果表明,该体系陶瓷具有单相钙钛矿结构;其压电常数d33可达183 pC/N,其机电耦合系数kp可达0.355;适量La3+对Bi3+的取代改善了压电性能;在1 175℃,2 h的烧结条件下,能够获得致密的[(Bi1-x-yLax)Na1-y]0.5BayTiO3陶瓷;La3+的引入抑制了晶粒的生长,高La含量的陶瓷晶粒较小。
New [(Bi1-x-yLax)Na1-y]0.5BayTiO3 lead-free piezoelectric ceramics were developed based on the design of the multiple complex in the A-site of ABO3-type Bi0.5Na0.5TiO3 ferroelectrics, and the ceramics were prepared by the conventional ceramic sintering technique. Piezoelectric properties,dielectric properties and microstructures of [(Bi1-x-yLax)Na1-y]0.5BayTiO3 lead-free piezoelectric ceramics were also studied. The measurements of piezoelectric properties reveal that this systems provides a high piezoelectric performance: d33=183pC/N,kp=0.355. The ceramics were well sintered at 1175℃ for 2 hours. La3+ suppresses the growing up of grains, and the size of those grains of the ceramics with high La3+ concentration is smaller than that with low La3+ concentration.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2004年第11期1-3,共3页
Electronic Components And Materials
基金
国家自然科学基金重大国际合作项目(50410179)
面上项目(59972020)
国家高技术研究发展计划资助项目(2001-AA325060)
教育部博士点基金资助项目(20030610035)
关键词
电子技术
钛酸铋钠
无铅压电陶瓷
压电性质
微观结构
electronic technology
[(Bi1-x-yLax)Na1-y]0.5BayTiO3
lead-free piezoelectric ceramics
piezoelectric properties
microstructure
