具有大位移驱动能力的RAINBOW压电陶瓷研究进展

Study Progress of RAINBOW Piezoelectric Ceramics for Large Displacement Actuators

RAINBOW(ReducedAndInternallyBiasedOxideWafer)压电陶瓷具有内部应力偏移 ,兼有还原层和未还原化层 ,并有特殊的拱形结构。在电场作用下 ,可以产生很高的轴向位移 ,能承受比一般压电陶瓷更大的应力载荷 ,是一种具有广阔应用前景的驱动材料。本文综述了RAINBOW压电陶瓷的力学分析方法、还原机制、微观组织结构、驱动特性 ,并指出了RAINBOW压电陶瓷的发展趋势。

RAINBOW (Reduced And Internally Biased Oxide Wafer)piezoelectric ceramics are a new type of stress-biased,unreduced-reduced composite ceramics,which have a special arc structure. They can output ultra-high axial displacement under applied electric field and have enhanced load-bearing capability,which means that they are excellent actuating materials.In this article their mechanics analysis,reduction mechanism,microstructures and the actuating properties were discussed in detail.And their directions for further study were also offered.