摘要
研究了Cymbal换能器的形状参数对位移放大作用的影响,以及Cymbal的谐振特性、迟滞系数、响应时间、有效机电耦合系数。通过优化端帽形状参数和制作工艺改善了Cymbal的位移放大作用和频率谐振等特性。其直流电场下位移放大作用是PZT-5的38倍,交流电场下达60倍。等效压电系数达22550 pm/V,谐振频率从28.54~58.53 kHz,响应时间为17~35μs。
The influences of different structure parameters on Cymbal transducers displacement amplification, resonance characteristics, hysteresis , fastest response time have been investigated. They showed more than 38 times amplification over the uncapped ceramic alone under the direct current （DC） mode. And under the alternating current （AC） mode, the Cymbals showed much larger peak-to-peak displacement than DC displacement. Effective pie- zoelectric charge coefficient of the Cymbal reached to 22 550 pm/V . The Cymbals also showed the first resonance frequency from 28.54 kHz to 58.53 kHz and faster resonance time about 17 μs to 35 μs.
出处
《压电与声光》
CSCD
北大核心
2007年第3期273-275,共3页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(No.59973015)
关键词
CYMBAL
位移放大
谐振特性
有效机电耦合系数
Cymbal
displacement amplification
resonance characteristics
effective electromechanical coefficient
