Lamb wave suppression in periodic 1-3 piezoelectric composite transducers

Author

Robertson, D. ; Hayward, G. ; Gachagan, A.

Author_Institution

Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK

Volume

2

fYear

2002

fDate

8-11 Oct. 2002

Firstpage

1181

Abstract

This paper investigates suppression of Lamb waves in piezoelectric composite transducers by matching their frequency to the even harmonics of the device thickness mode. This was done by a combination of experimental measurement on a number of transducers along with simulations using the finite element code PzFlex. Both 2-2 and 1-3 composites made from the single crystal materials pzn-4.5 % pt and pzn-8 % pt were investigated along with composites made from pzt5h ceramic. The theory is supported by means of experimental impedance analysis and laser scanning of surface displacement, with good agreement demonstrated.

Keywords

composite materials; finite element analysis; lead compounds; piezoceramics; piezoelectric transducers; surface acoustic waves; Lamb wave suppression; PZN-PT single crystal; PZT ceramic; PbTiO₃; PbZnO₃NbO₃-PbTiO₃; PzFlex code; finite element simulation; impedance analysis; laser scanning; periodic 1-3 piezoelectric composite transducer; surface displacement; thickness mode harmonic; Ceramics; Composite materials; Crystalline materials; Finite element methods; Frequency; Laser theory; Optical materials; Piezoelectric transducers; Surface emitting lasers; Surface impedance;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE

ISSN

1051-0117

Print_ISBN

0-7803-7582-3

Type

conf

DOI

10.1109/ULTSYM.2002.1192504

Filename

1192504