Method of detecting sound in water using piezoelectric-polymer c

Details Method of detecting sound in water using piezoelectric-polymer c Method of detecting sound in water using piezoelectric-polymer c

1988-11-15

1990-12-11

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

310337, 252 629, H04R 1700

Patent

active

049775472

ABSTRACT:
A hydrophone device is provided with a piezoelectric ceramic-polymer composite of 0-3 connectivity in which the piezoelectric filler comprises a solid solution of PBTiO.sub.3 -BiFeO.sub.3 wherein the solid solution contains 50-80 wt. % of the BiFeO.sub.3. The piezoelectric ceramic-polymer composite has large hydrostatic piezoelectric charge and voltage coefficients which are desirable in hydrophone devices.

REFERENCES:
patent: 4624796 (1986-11-01), Giniewicz et al.
IEEE 1984 Ultrasonics Symposium, vol. 1, Nov. 14-16, 1984, X-Ray and Electrical Studies of the PbTiO.sub.3 -BiFeO.sub.3 System, Soviet Physics-Crystallography, vol. 7, No. 1, Jul.-Aug. 1962.
American Ceramics Bulletin, New Horizons for Ceramics, vol. 63, No. 3, (1984).
Dielectric Properties of Solid Solutions of BiFeO.sub.3 with PB(Ti.sub.1 Zr)O.sub.3 at High Temperature and High Frequency, Robert T. Smith et al., Journal of Applied Physics, vol. 39, No. 1, Jan. 1968.

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