Title :
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
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;
Conference_Titel :
Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE
Print_ISBN :
0-7803-7582-3
DOI :
10.1109/ULTSYM.2002.1192504
