Title :
Characteristics of Lamb waves in piezoelectric ceramics
Author :
Teston, F. ; Feuillard, G. ; Certon, D. ; Janin, Y. ; Tessier, L. ; Lethiecq, M.
Author_Institution :
LUSSI, GIP Ultrasons, Tour, France
Abstract :
The concept of effective permittivity of a plate is used to calculate the Lamb wave eigenfrequencies. Phase and group velocities as well as the electromechanical coupling coefficient for various electrical boundary conditions are calculated as a function of thickness to wavelength ratio. The theoretical analysis is experimentally verified by measuring the resonant frequencies of Lamb wave delay lines fabricated on Pz27 and Pz34 commercial ceramics
Keywords :
permittivity; piezoceramics; surface acoustic wave delay lines; surface acoustic waves; Lamb wave characteristics; Lamb wave delay lines; Lamb wave eigenfrequencies; effective permittivity; electrical boundary conditions; electromechanical coupling coefficient; group velocities; phase velocities; piezoelectric ceramics; plate; resonant frequencies; thickness to wavelength ratio; vibrating modes; Ceramics; Delay lines; Frequency measurement; Metallization; Permittivity; Piezoelectric materials; Resonant frequency; Surface acoustic waves; Testing; Wavelength measurement;
Conference_Titel :
Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-4153-8
DOI :
10.1109/ULTSYM.1997.663040
