Property matrices of [011]-poled rhombohedral Pb(Zn1/3Nb2/3)O3–(4.5-7)%PbTiO3 single crystals

摘要

This paper reports the elastic, piezoelectric and dielectric properties of [011]-poled flux grown Pb(Zn_1/3Nb_2/3)O₃-xPbTiO₃ (x = 0.0475, 0.055 and 0.065) single crystals of rhombohedral phase measured using the resonance technique at room temperature. The [011]-poled PZN-PT single crystals exhibit excellent transverse and shear properties with reasonable phase transformation properties (k₃₂ ≥ 0.90, k₁₅ ≈ 0.92, d₃₂ ≈ –(2400-3200) pC/N, d₁₅ ≈ 4800 pC/N, T_RO ≈ 90-104 °C for PZN-6.5%PT and k₃₂ ≥ 0.90, k₁₅ ≈ 0.89, d₃₂ ≈ –(1850-2400) pC/N, d₁₅ ≈ 4200 pC/N, T_RO ≈ 105-115 °C for PZN-5.5%PT). These unique piezoelectric properties of [011]-poled PZN-PT crystals, together with the property matrices provided in this work, can be used advantageously to design high-performance single crystal transducers of transverse or shear activation/sensing modes to suit various application needs.