Porous piezoelectric ceramic transducer for medical ultrasonic applications

Author

Matsunaka, T. ; Tabuchi, Y. ; Kasai, C. ; Tachikawa, K. ; Kyono, H. ; Ikeda, H.

Author_Institution

Aloka Co. Ltd., Tokyo, Japan

fYear

1988

fDate

2-5 Oct 1988

Firstpage

681

Abstract

Porous piezoelectric ceramic transducers appropriate for medical ultrasonic imaging have been developed. The 3-3 type piezoelectric ceramics were made by sintering a mixture of PZT (lead zinc titanate) and polymer powders at about 1300°C. Porous ceramics with a maximum pore size of 40 μm were obtained. The acoustic impedance is in the range of 10 to 18 Mrayl. The electromechanical coupling factor is 0.45-0.67, and the mechanical Q is 5-15. Using these elements, mechanical sector scanners were fabricated. They generated acoustic pulses with very short ringdown times, which resulted in improved axial spatial resolution

Keywords

biomedical ultrasonics; piezoelectric transducers; ultrasonic transducers; 1300 degC; PZT; acoustic impedance; electromechanical coupling factor; mechanical Q; mechanical sector scanners; medical ultrasonic; piezoelectric ceramic transducer; polymer powders; Acoustic transducers; Bioceramics; Biomedical imaging; Biomedical transducers; Piezoelectric transducers; Polymers; Titanium compounds; Ultrasonic imaging; Ultrasonic transducers; Zinc;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1988. Proceedings., IEEE 1988

Conference_Location

Chicago, IL

Type

conf

DOI

10.1109/ULTSYM.1988.49464

Filename

49464