Beam-Mode Piezoelectric Properties of Ternary Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 Single Crystals for Medical Linear Array Applications

In this work, the dielectric and beam-mode piezoelectric properties of ternary 0.35Pb(In1/2Nb1/2)O-3-0.35Pb(Mg1/3Nb2/3)O-3-0.30PbTiO(3) (PIMNT35/35/30) piezoelectric single crystals were investigated. The Curie temperature (T (C)) and rhombohedral-to-tetragonal phase-transition temperature (T (rt)) are 187A degrees C and 127A degrees C, about 30A degrees C higher than those of PMNT crystals. The beam-mode coupling coefficient k (33) (w) was found to be 90.3%. Furthermore, 3.5-MHz linear arrays based on PIMNT35/35/30 crystals and Pb(Zr1-x Ti (x) )O-3 ceramic (PZT-5H) were simulated using PiezoCAD software. The results indicate that the sensitivity and -6 dB bandwidth of a PIMNT35/35/30 transducer would be approximately 4 dB and 20% higher, respectively, compared with a traditional PZT transducer.