Experimental determination of SAW properties of 5 standard piezoceramics

Author

Feuillard, G. ; Lethiecq, M. ; Janin, Y. ; Alemany, C. ; Jimenez, B. ; Millar, C. ; Wolny, W.

Volume

1

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

447

Abstract

Bulk elastic, piezoelectric and dielectric constants of four lead zirconate titanate piezoceramics, Pz24, Pz26, Pz27 and Pz28, and a modified lead titanate, Pz34, are measured and used to theoretically compute the effective permittivity curve of each material from which the SAW properties are deduced. In parallel, experimental measurements of the SAW properties are carried out by using a curve fitting algorithm on the real and imaginary parts of the electrical input impedance of an unapodised single electrode SAW transducer. The SAW propagation losses are also measured using a SAW delay line. A free surface wave velocity varying from 2100 m/s to 2500 m/s and a surface wave coupling coefficient k_s² between 1.5% and 4% are found. Both determination methods of SAW properties are discussed in terms of sensitivity and the potential of piezoceramics for SAW applications is examined

Keywords

acoustic materials; curve fitting; elastic constants; lead compounds; permittivity; piezoceramics; surface acoustic wave delay lines; surface acoustic wave transducers; 2100 to 2500 m/s; PZT; PbTiO₃; PbZrO3TiO3; SAW delay line; SAW propagation losses; SAW properties; bulk elastic constants; curve fitting algorithm; dielectric constants; effective permittivity curve; electrical input impedance; free surface wave velocity; piezoceramics; piezoelectric constants; surface wave coupling coefficient; unapodised single electrode SAW transducer; Curve fitting; Mechanical factors; PZT materials/devices; Permittivity; Surface acoustic wave delay lines; Surface acoustic wave materials; Surface acoustic wave transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401627

Filename

401627