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Single crystal Pb(Zn1/3Nb2/3)O3/PbTiO3 (PZN/PT) in medical ultrasonic transducers

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4 Author(s)
Lopath, P.D. ; Dept. of Bioeng., Pennsylvania State Univ., University Park, PA, USA ; Park, Seung-Eek ; Shung, K.K. ; Shrout, T.R.

Solid solutions of Pb(Zn1/3Nb2/3)O3 (PZN) and PbTiO3 (PT) have been grown in single crystal form to sizes large enough to permit the fabrication of a 5 MHz phased array. Transducer construction techniques employed differ from standard ceramic arrays. Crystallographic alignment is found to be a significant contributor to piezoelectric performance. The crystal structure and phase diagram play a major role in processing steps requiring heating such as poling and electroding. A complex composite structure is utilized to allow for efficient operation while maintaining structural integrity. The pulse-echo performance and insertion loss of this array are found to be superior to a similarly constructed PZT 5H array

Published in:

Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE  (Volume:2 )

Date of Conference:

5-8 Oct 1997