The electrical properties of 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-0.3PT) single crystal/polymer 1-3 composites were simulated under different volume fraction of the piezoelectric phase. It was concluded that the composites exhibit optimal properties when the PMN-0.3PT volume fraction is around 64%. Under this volume fraction, the composites with different polymer phases were fabricated using dice-and-fill method. Experiment shows that the stiffness coefficient c, density ρ, as well as the bonding strength have great influence on the obtained properties of the composites. The composites exhibit excellent properties, with electromechanical coupling factor kt as high as 90.1%, piezoelectric d33 larger than 1000 pC/N, mechanical quality factor Qm only 10.39, and acoustic impedance Z less than 20 MRayls. The results indicate that these piezoelectric composites are promising candidates for transducer and sensor applications.
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