Design and analysis of a broadband class VII flextensional transducer with the third-generation crystal, Mn:PIN-PMN-PT

Abstract

For designing flextensional transducers (FTs), driving material is an important innovation direction to improve performance. The third-generation single crystal: manganese-modified Pb(In 1/2 Nb 1/2 )O 3 -Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (Mn:PIN-PMN-PT) has superior piezoelectric and electromechanical properties. However, up to date, Mn:PIN-PMN-PT single crystals applied to practical FTs haven’t been reported in the literature. In this paper, a broadband class VII FT based on [001] C poled Mn:PIN-PMN-PT is proposed. To fully utilize the excellent properties of Mn:PIN-PMN-PT, the structural parameters of the transducer were designed and optimized using the finite element method (FEM). Prototypes were fabricated and measured. Compared with the PZT-4 class VII FT, the bandwidth of the Mn:PIN-PMN-PT FT increased by 27.8%, and the transmitting voltage response (TVR) was 6.3 dB higher. This work verifies that Mn:PIN-PMN-PT single crystals have great potential as the driving material for broadband high-power FTs. • This paper proposes a broadband class VII flextensional transducer based on Mn:PIN-PMN-PT single crystals. • We fully utilize the high piezoelectric and electromechanical properties of the third-generation crystal, Mn:PIN-PMN-PT. • The acoustic performance of the Mn:PIN-PMN-PT flextensional transducer is significantly improved. • Mn:PIN-PMN-PT has great potential as the driving material for broadband high-power flextensional transducers.