压电单晶弯张换能器研究  

Analysis of a single crystal piezoelectric flextensional transducer

作　　者：陈思 蓝宇 顾郑强 

机构地区：[1]哈尔滨工程大学水声技术实验室,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2010年第9期1167-1171,共5页Journal of Harbin Engineering University

基　　金：水声技术实验室基金资助项目(9140C2008020705)

摘　　要：为了进一步了解弛豫铁电单晶材料的特性,研究了单晶换能器的性能,利用有限元软件ANSYS对PMNT驱动的Ⅳ型弯张换能器进行了分析.设计并制作了一个PMNT弯张换能器,测量得到其谐振频率为1.7 kHz,最大发送电压响应为132 dB;制作了相同尺寸的PZT-4弯张换能器,并与PMNT弯张换能器进行了比较.与PZT-4弯张换能器相比,PMNT弯张换能器的谐振频率低17%,谐振时的电导值大5倍,获得的发送电压响应高5 dB.A novel relaxor ferroelectric single crystal,made of lead magnesium niobate-lead titanate（PMNT）,was found to exhibit excellent piezoelectric properties.This single crystal transducer was studied to learn more about the characteristics of relaxor ferroelectric single crystals.A class Ⅳ flextensional transducer driven by PMNT was studied using the finite element software ANSYS.A PMNT flextensional transducer was designed and produced.According to measurements,its maximum transmitting voltage response reached 132 dB with its resonance frequency at 1.7 kHz.For comparison,a PZT-4 flextensional transducer with the same dimensions was produced.The PMNT flextensional transducer produced a 17% lower resonance frequency,5 times more conductance,and a 5 dB higher transmitting voltage response than the PZT-4 flextensional transducer of the same dimensions.

关 键 词：弛豫铁电单晶 PMNT 弯张换能器 有限元法 

分 类 号：TB565[交通运输工程—水声工程]