Ferroelectric materials for electromechanical transducer applications

被引:226
作者
Cross, LE
机构
[1] Intercollege Mat. Res. Laboratory, Pennsylvania State University, University Park
关键词
sensors; actuators; piezoelectric; ferroelectric; electrostrictive; ceramic composites;
D O I
10.1016/0254-0584(95)01617-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper explores the special characteristics of ferroelectric materials which make them highly suitable for application as both sensors and actuators in electromechanical (smart) systems. The domain structure which gives the possibility to impart a polar axis in a randomly axed polycrystal ceramic is essential for piezoelectricity, but all electromechanical behavior may be traced ultimately to the electrostrictive coupling between polarization and strain fields. Topics to be discussed will include: (1) the special advantages of materials in the lead zirconate:lead titanate solid solution systems for both sensing and actuation; (2) domain and phase switching contributions to electrical, mechanical and coupled responses; (3) scaling effects in ferroics and the origins of the relaxer ferroelectric behavior of electrostrictive ceramics; (4) composite polymer:ceramic systems and the maneuverability engendered by phase connectivity control.
引用
收藏
页码:108 / 115
页数:8
相关论文
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