Propagation of Lamb waves in 1-3 piezocomposite bordered by liquids

Author

Teston, F. ; Feuillard, G. ; Lethiecq, M.

Author_Institution

EIVL, GIP Ultrasons/LUSSI, Blois, France

Volume

2

fYear

1999

fDate

1999

Firstpage

1066

Abstract

This paper deals with the effect of liquid loading on the propagation of Lamb waves in a piezocomposite plate. In these materials, the first symmetric mode exhibits a very low phase velocity and a strong electromechanical coupling factor compared to conventional materials (quartz, lithium niobate or ceramics). First, the theoretical dispersion curves are calculated and experimentally verified. Then, the influence of the viscosity and the adiabatic compressibility modulus of the liquid on the frequency and the attenuation of the S₀ mode is studied. The frequency and attenuation variations have been measured when the plate is loaded by a glycerol solution, and are found to be in fair agreement with theoretical calculations. The results indicate that the S₀ mode is suitable for liquid phase sensor applications

Keywords

filled polymers; frequency response; piezoceramics; surface acoustic wave sensors; surface acoustic waves; 1-3 piezocomposite plate; Lamb wave propagation; adiabatic compressibility modulus; attenuation variations; dispersion curves; first symmetric mode; frequency response; frequency variations; glycerol solution; liquid loading effect; liquid phase sensor applications; strong electromechanical coupling; transfer function; very low phase velocity; viscosity influence; Attenuation; Boundary conditions; Ceramics; Dielectric constant; Frequency; Liquids; Lithium niobate; Permittivity; Testing; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European

Conference_Location

Besancon

ISSN

1075-6787

Print_ISBN

0-7803-5400-1

Type

conf

DOI

10.1109/FREQ.1999.841489

Filename

841489