Finite element modeling of transduction materials with application to piezoelectric hollow sphere transducers

Author

Hladky-Hennion, A.C. ; Bossut, R. ; Alkoy, S. ; Lopath, P. ; Newnham, R.E.

Author_Institution

ISEN, IEMN, Lille, France

fYear

1998

fDate

27-29 May 1998

Firstpage

709

Lastpage

714

Abstract

Spherically focused transducers were prepared from miniature thin-wall lead zirconate titanate hollow spheres (BBs). The spheres were prepared from slurries of soft PZT powders using a coaxial nozzle process, and have diameters ranging from 1 to 6 mm and wall thicknesses from 12 to 150 μm. The two main vibration modes, the radial and wall thickness modes, were observed near MHz and 30-40 MHz, respectively. Focused transducers were prepared by machining sections of the hollow spheres. The transducers were characterized in the pulse echo mode and with the help of finite element analysis (FEA). The ATILA code has been adapted to take into account a coupled solid-piezoelectric problem in the time analysis. The results obtained from experiments were confirmed by FEA

Keywords

biomedical ultrasonics; electron device manufacture; finite element analysis; lead compounds; materials preparation; piezoceramics; piezoelectric transducers; time-domain analysis; ultrasonic transducers; 1 MHz; 1 to 6 mm; 12 to 150 mum; 30 to 40 MHz; ATILA code; FEA; PZT; PbZrO3TiO3; US transducers; biomedical application; coaxial nozzle; finite element analysis; finite element modeling; focused transducers; miniature thin-wall hollow spheres; piezoelectric hollow sphere transducers; pulse echo mode; radial and wall thickness modes; slurries; soft PZT powders; spherically focused transducers; time analysis; transduction materials; vibration modes; wall thickness modes; Acoustic transducers; Ceramics; Finite element methods; Focusing; Frequency; Machining; Piezoelectric materials; Piezoelectric transducers; Shape; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 1998. Proceedings of the 1998 IEEE International

Conference_Location

Pasadena, CA

ISSN

1075-6787

Print_ISBN

0-7803-4373-5

Type

conf

DOI

10.1109/FREQ.1998.717978

Filename

717978