1-1-3型压电复合材料的水声换能器研究

Study on the Underwater Acoustic Transducer Based on 1-1-3 Piezoelectric Composites

应用切割灌注法制备了1-1-3型压电复合材料,并对其电学性能进行了测试。1-1-3型压电复合材料通过在压电晶柱间引入2种具有不同杨氏模量的聚合物,提高复合材料整体的机电耦合系数。经测试,其机电耦合系数达0.65。以此材料为基础制备了谐振频率为110kHz的水声换能器,并研究了匹配层对1-1-3型压电复合材料换能器性能的影响。通过对比发现,当换能器具有匹配层结构时,可产生共振效应,能有效提高换能器的发射电压响应及接收灵敏度。

The 1-1-3 piezoelectric composites are prepared by the dicing and filling method, and the electrical properties have been tested.Two kinds of polymer with different Young′s modulus have been induced into the gap between the piezoelectric crystal rods of 1-1-3 piezoelectric composites to improve the overall electromechanical coupling coefficient of the composites.The electromechanical coupling coefficient of the 1-1-3 composites is up to 0.65.Two underwater transducers with the resonant frequency of 110 kHz have been fabricated by 1-1-3 piezoelectric composites and the effect of the matching layer on the performance of 1-1-3 piezoelectric composite transducer has been studied. Through comparison,it has been found that when the transducer has a matching layer structure,a resonance effect can be generated, and the transmitting voltage response and receiving sensitivity of the transducer can be effectively improved.