Title :
A new transverse piezoelectric mode 2-2 piezocomposite for underwater transducer applications
Author :
Zhang, Q.M. ; Chen, J. ; Wang, H. ; Zhao, J. ; Cross, L.E. ; Trottier, M.C.
Author_Institution :
Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
fDate :
7/1/1995 12:00:00 AM
Abstract :
In this paper, we present a new type of 2-2 piezoelectric ceramic-polymer composite operated at the transverse piezoelectric mode (TP). The new TP mode piezocomposite has exceptionally high hydrostatic piezoelectric response, high reliability, and can be made at low cost. Based on the isostrain approximation, an analytical model is developed to analyze and optimize the effective piezoelectric and the effective elastic properties of the composite. Several composites with the new structure were fabricated and tested. The calculated and experimental results show good agreement. It is shown that a TP 2-2 composite made of PZT plates in a soft polymer matrix with elastically unidirectional face plates yields an effective hydrostatic piezoelectric coefficient d/sub h/ of 6000 (pC/N) and a hydrostatic figure of merit d/sub h/g/sub h/ higher than 30000 (10/sup -15/ m/sup 2//N).<>
Keywords :
lead compounds; piezoceramics; reliability; ultrasonic transducer arrays; underwater sound; PZT; PZT plates; PbZrO3TiO3; ceramic-polymer composite; effective hydrostatic piezoelectric coefficient; elastic properties; elastically unidirectional face plates; hydrostatic figure of merit; hydrostatic piezoelectric response; isostrain approximation; piezocomposite; reliability; soft polymer matrix; transverse piezoelectric mode; underwater transducer applications; Acoustic transducers; Biomedical acoustics; Composite materials; Costs; Ferroelectric materials; Legged locomotion; Material properties; Piezoelectric materials; Piezoelectric transducers; Polymers;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
