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扭转压电复合材料及其应用
引用本文:党长久,杨玉瑞,李明轩.扭转压电复合材料及其应用[J].应用声学,1997,16(2):7-13.
作者姓名:党长久  杨玉瑞  李明轩
作者单位:中国科学院声学研究所!北京,100080,中国科学院声学研究所!北京,100080,中国科学院声学研究所!北京,100080
摘    要:本文描述了轴向-切向连通的圆柱2-2型压电复合材料。用PZT/环氧树脂制作的普通2-2型压电复合材料可拼接成一种具有扭转振动的压电复合材料。这种压电复合材料和为圆柱2-2型压电复合材料的近似。本文还给出两组这种拼接型压电材料晶片的参数,用这种压电材料制作了产生扭转振动的换能器,测试了换能器的波形,频谱特性和偏振特性,指出了使用适当的高通滤波器可以抑制横波中的径向模,分析了接收波列中纵波抑制较强的原

关 键 词:压电复合材料  超声换能器  横波换能器  换能器

Torsional piezocomposite materials and their applications
Dang Chang jiu,Yang Yurui and Li Mingxuan.Torsional piezocomposite materials and their applications[J].Applied Acoustics,1997,16(2):7-13.
Authors:Dang Chang jiu  Yang Yurui and Li Mingxuan
Institution:Institute of Acoustics, Academia Sinica, Beijing 100080;Institute of Acoustics, Academia Sinica, Beijing 100080;Institute of Acoustics, Academia Sinica, Beijing 100080
Abstract:A cylindrical 2-2 piezocomposite with axial and tangential connectivity is de scribed. The torsional piezocomposite materials, which approximate the cylindrical 2-2 piezocomposites, are made by piecing together the ordinary 2-2 piezocomposite of PZT/e-poxy. Two such blocks are fabricated, and their characteristics are measured. From them, transducers with torsional modes are then built, of which the waveforms, spectra and acoustic polarization are tested. A proper high-pass filter is used to eliminate the radi al mode in the transverse waveform. The reason for the weakness of the compressional wave in the received waveform is analyzed.
Keywords:Piezocomposites  Ultrasonic transducers  Transverse wave transducers  Torsional shear modes
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