, Volume 40, Issue 1, pp 92-96
Date: 09 Oct 2010

Complete Set of Material Constants of 〈011〉-Poled Rhombohedral Single-Crystal 0.25Pb(In1/2Nb1/2)O3-0.47Pb(Mg1/3Nb2/3)O3-0.28PbTiO3

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The complete set of elastic, dielectric, and piezoelectric constants of a 0.25Pb(In1/2Nb1/2)O3-0.47Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 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.