PIMNT单晶弯曲圆盘换能器设计  

Design of PIMNT single crystal bender transducer

作　　者：张琪 张彬[1] 许伟杰[1] 童晖[1,3] ZHANG Qi;ZHANG Bin;XU Weijie;TONG Hui(Shanghai Acoustics Laboratory,Chinese Academy of Sciences,Shanghai 201815,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China)

机构地区：[1]中国科学院声学研究所东海研究站,上海201815 [2]中国科学院大学,北京100049 [3]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《声学技术》2024年第2期292-298,共7页Technical Acoustics

基　　金：国家重点研发计划项目(2022YFB3206900:2022YFB3206902-1);中国科学院声学研究所自主部署“前沿探索”项目(QYTS202113);上海市产业协同创新项目(HCXBCY-2022-034)

摘　　要：新型弛豫铁电单晶材料铌铟酸铅-铌镁酸铅-钛酸铅晶体(Pb(In_(1/2)Nb_(1/2))O_(3)-Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3),PIMNT)的压电系数是陶瓷材料的6倍以上,应变量高出压电陶瓷10倍以上,具有较高的机电耦合系数,压电性能优于传统PZT材料。文章将单晶材料应用于带空气腔的弯曲圆盘换能器中,利用ANSYS仿真软件优化换能器结构,确定换能器尺寸,设计制作PIMNT压电单晶换能器和PZT4压电陶瓷换能器,并进行了水池实验。换能器实测结果与仿真结果保持一致,单晶换能器的谐振频率为2.85 kHz,最大发送电压响应为136.3 dB。结果表明,相比于同尺寸的陶瓷换能器,将PIMNT压电单晶应用于弯曲圆盘换能器可降低谐振频率,提高发送电压响应,提升换能器的工作性能,为进一步改善单晶换能器综合性能提供参考。The relaxed ferroelectric single crystal material PIMNT is a new material with a higher electro-mechanical coupling coefficient and better piezoelectric performance than conventional PZT materials.Its piezoelectric coefficient is 6 times higher than that of ceramic materials,and its strain is more than 10 times higher than that of piezoelectric ceramics.In this paper,the PIMNT piezoelectric single crystal material is applied to the bender transducer with an air cavity,and the ANSYS simulation software is used to optimize the transducer structure and determine the transducer size.A PIMNT piezoelectric single crystal transducer and a PZT4 piezoelectric ceramic transducer are made,and the measurements are performed in the pool.The measured results of the transducers are consistent with the simulation results.The measured center frequency of the PIMNT single crystal transducer is 2.85 k Hz and the maximal transmitting voltage response can reach 136.3dB.The results show that compared with ceramic transducers of the same size,the application of PIMNT piezoelectric single crystal material to bender transducers can reduce the resonant frequency and improve the transmitting voltage response and the transducer operating performance.It provides a reference for further improving the comprehensive performance of single crystal transducer.

关 键 词：单晶 弯曲圆盘换能器 有限元法 

分 类 号：TB565.1[交通运输工程—水声工程]