Characterization of PZT hollow-sphere transducers

Author

Fielding, J.T., Jr. ; Smith, D. ; Meyer, R., Jr. ; Trolier-McKinstry, Susan ; Newnham, R.E.

Author_Institution

Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA

fYear

1991

fDate

33457

Firstpage

202

Lastpage

205

Abstract

Millimeter size, hollow spheres of lead zirconate titanate have been fabricated by blowing gas through a fine-grained slurry of PZT-5. Techniques were developed for the classification of defects in green and sintered spheres. The spheres were poled radially between inner and outer electrodes. The dielectric and piezoelectric properties were characterized for poled spheres. The two principal resonances were a breathing mode near 700 KHz and a wall thickness mode near 10 MHz. Hydrostatic d_h coefficients ~1000 pC/N were measured. Pulse-echo measurements were also performed to characterize transducer performance. Potential applications for these miniature omnidirectional transducers include biomedical imaging, flow noise sensors and hydrophones

Keywords

capacitance; crystal defects; dielectric polarisation; echo; lead compounds; piezoceramics; piezoelectric transducers; sintering; 10 MHz; 700 kHz; PZT; PZT hollow-sphere transducers; PbZrO3TiO3; biomedical imaging; breathing mode; defects; dielectric properties; fine-grained slurry; flow noise sensors; green spheres; hydrophones; hydrostatic d_h coefficients; inner electrodes; lead zirconate titanate; millimeter size hollow spheres; miniature omnidirectional transducers; outer electrodes; piezoelectric properties; pulse-echo measurements; resonances; sintered spheres; transducer performance; wall thickness mode; Biomedical measurements; Biomedical transducers; Dielectric measurements; Electrodes; Performance evaluation; Piezoelectric transducers; Pulse measurements; Resonance; Slurries; Titanium compounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on

Conference_Location

University Park, PA

Print_ISBN

0-7803-1847-1

Type

conf

DOI

10.1109/ISAF.1994.522338

Filename

522338