Complete Set of Material Constants of <011>-Poled Rhombohedral Single-Crystal 0.25Pb(In_(1/2)Nb_(1/2))O_(3)-0.47Pb(Mg_(1/3)Nb_(2/3))O_(3)-0.28PbTiO_(3)

摘要

The complete set of elastic, dielectric, and piezoelectric constants of a 0.25Pb(In_(1/2)Nb_(1/2))O_(3)-0.47Pb(Mg_(1/3)Nb_(2/3))O_(3)-0.28PbTiO_(3) ternary relaxor ferroelectric single crystal after <011> poling was determined by ultrasonic and resonance methods. It exhibited a rhombohedral structure as determined by powder x-ray diffraction (XRD) and x-ray fluorescence (XRF) analysis. The electromechanical coupling factor k_(15) and piezoelectric coefficient d_(15) for shear mode are 0.93 pC/N and 2658 pC/N, and k_(32) and d_(32) for transverse mode are 0.91 pC/N and -1337 pC/N, respectively. More importantly, the rhombohedral to orthorhombic phase-transition temperature is much higher than that of PZN-0.07PT or PMN-0.29PT.