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High-efficiency transducers for acoustic diagnostics on the basis of novel anisotropic piezoelectric materials

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2 Author(s)
Shikhman, M. ; Inst. of Phys., Rostov State Univ., Russia ; Grineva, L.D.

A major source of the improvement in acoustic means of technical diagnostics is the use of high-efficiency piezoelectric materials in primary information pickups (transducers). The most optimum relation of characteristics is ensured by a new group of so called anisotropic piezoelectric materials possessing a high anisotropy of piezoelectric properties. The PbTiO3-based PCR-70 and PCR-72 piezoceramics developed by our Institute belong to this group; they are characterized by the high Kt, the high piezoelectric response (g33 >50mV·m/N), the very low mechanical quality (Qmt<10) and a practically zero value of Kp. The transducer characteristics were studied in a receiving mode during the operation on a massive plate surface. Special steps were taken to remove reverberations. The above properties of piezoelectric materials ensure the high response (1...4·109V/N), a small duration of transient processes and a high selectivity to longitudinal (normal to the operating surface) vibrations for transducers. A combination of the obtained characteristics makes the developed transducers competitive with the best known analogues

Published in:

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

Date of Conference:

7 Aug 1991