论文部分内容阅读
基于反铁电陶瓷(PSZT)化学还原制备的RAINBOW驱动器是一种具有内部应力偏移，兼有还原层和氧化层，驱动位移较大的新型驱动器。实验发现反铁电陶瓷较易还原，理想还原条件为：870℃保温2～3h；与普通反铁电驱动器相比，RAINBOW驱动器能在强度较低的电场作用下发生铁电相变，得到很大的轴向位移(约190μm)；加载方式对RAINBOW的驱动性能具有决性的影响。rn“,”A new type of large-displacement actuator called RAINBOW (Reduced And Internally Biased Oxide Wafer) was fabricated by a chemical reduction of PSZT antiferroelectric ceramic. It is found that PSZT was easily reduced and the optimal conditions for producing RAINBOW samples were determined to be 870℃ for 2～3 h. The AFE-FE phase transitions occur at lower field strength in RAINBOWs compared with normal PSZT. Larger axial displacement (about 190μm) was obtained from the RAINBOWs by application of electric fields exceeding the phase switching level. The field-induced displacement of the RAINBOWs is dependent on the manner of applying the load on the samples.