Abstract
When operating high‐power electromechanical devices, the performance is often limited by self‐heating within the active material. This is especially true in high‐power, broadband underwater projectors using the piezoelectric single crystal Pb(Mg1/3Nb2/3O3–PbTiO3 (PMN‐PT). Although PMN‐PT crystals show an excellent piezoelectric response (d33 > 1500 pC/N) and high‐coupling coefficient (k33 > 0.90), device performance is limited by the high‐mechanical losses (QM < 100) and low‐temperature phase transformation (TRT = 95 °C). This work describes the material property enhancements of two compositional modifications and compares the performance of these crystals in high‐power, broadband transducers. One such modification is the addition of Pb(In1/2Nb1/2O3 (PIN) or PbZrO3 (PZ) to the binary PMN‐PT composition. The greater thermal stability of ternary PIN‐PMN‐PT and PZ‐PMN‐PT crystals is shown by comparing the dielectric permittivity, piezoelectric coefficient, and coupling coefficient to unmodified PMN‐PT as a f...
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