CAJ | 학술논문

在研制由钨青铜型压电陶瓷分立驱动器组装成特种圆环状压电驱动器中，发现组装后横向位移模圆环驱动器的位移量呈现异常的变化，它的位移量比分立器件的增加可达30%.对组成、器件制备等进行了大量实验，分析认为,分立器件在组装后处于严重的压应力中，它对逆压电效应的影响是上述结果的原因.它的主要机制是在压应力下通过90°畴重新取向或钨青铜结构中基本组元---氧八面体的畸变使自发极化偏离于原压应力方向，一旦施加电场则造成位移量的大大增加.
재연제유오청동형압전도자분립구동기조장성특충원배상압전구동기중，발현조장후횡향위이모원배구동기적위이량정현이상적변화，타적위이량비분립기건적증가가체30%.대조성、기건제비등진행료대량실험，분석인위,분립기건재조장후처우엄중적압응력중，타대역압전효응적영향시상술결과적원인.타적주요궤제시재압응력하통과90°주중신취향혹오청동결구중기본조원---양팔면체적기변사자발겁화편리우원압응력방향，일단시가전장칙조성위이량적대대증가.
Unusual increase of displacement in special ring type piezoelectric ceramic actuators with transverse mode was found, which were made from three discrete actuators using piezoelectric ceramics with tungsten bronze structure.The increasing values of displacement were as high as about 30%, as compared with the composing discrete one. The discrete actuators are in press stress according to analyses and experiments, and the unusual phenomenon is related to their stress condition. This mechanism can be described as follows: under the press stress the spontaneous polarization Ps will departure from original direction (the pressure direction), due to some 90 domains reorientation or some distortion of oxygen-octahedras in tungsten bronze structure, then as soon as electrical field E is applied, the Ps will return the original directions, that leads to the increment of strain for the ring type actuator.