Optimization of acoustic matching layers for piezocomposite transducers

Author

Lamberti, Nicola ; De Espinosa, Francisco Montero ; Perez, Nicolas ; Gomez, Hector ; Negreira, Carlos

Author_Institution

Dipt. di Ingegneria dell´´Informazione ed Ingegneria Elettrica, Salerno Univ., Italy

Volume

2

fYear

2000

fDate

36800

Firstpage

1105

Abstract

At present, lot of piezoelectric broad band ultrasonic transducers use as active material piezoelectric ceramic composites. In a typical transducer based on piezocomposites the active material is mounted on a soft backing and one matching layer is placed on the front, radiating face, with the aim to match the acoustic impedance of the medium and to enlarge the bandwidth. In this paper an optimization work is shown to demonstrate that a composite configuration can be used in the matching layer in order to improve the efficiency and the band of the transducers. An approximated two-dimensional analytical model has been used to optimize the design of a composite-structured matching layer in the case of 2-2 composites, obtaining different results for the polymer and piezoceramic composite phases

Keywords

acoustic impedance; composite materials; piezoelectric transducers; ultrasonic transducers; acoustic impedance matching layer; active material; bandwidth; design optimization; efficiency; piezoceramic composite; piezocomposite transducer; piezoelectric broadband ultrasonic transducer; piezoelectric polymer composite; soft backing layer; two-dimensional analytical model; Acoustic materials; Acoustic transducers; Analytical models; Bandwidth; Ceramics; Composite materials; Impedance; Piezoelectric materials; Piezoelectric transducers; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2000 IEEE

Conference_Location

San Juan

ISSN

1051-0117

Print_ISBN

0-7803-6365-5

Type

conf

DOI

10.1109/ULTSYM.2000.921518

Filename

921518