Domain engineering and full matrix material constants of the [111]c-poled 0.63Pb(Mg1/3Nb2/3)-0.37PbTiO3 single crystal

摘要: Domain engineering was performed on the [111]c-oriented tetragonal ferroelectric 0.63Pb(Mg1/3Nb2/3)-0.37PbTiO3 (PMN-0.37PT) single crystal in order to achieve better piezoelectric properties. Influences of poling electric field (EP), temperature, and time electromechanical properties were investigated. The dielectric constants increase with increasing EP. In addition, response increases but saturates after 10 min at 30 °C or 20 150 under EP = 2 kV mm−1. strain coefficient d33 can be improved from 407 pC N−1 poled 706 near TC, which is 27.9% higher than highest value reported before (d33 551.9 N−1). enhancement results domain structure redistribution occurring paraelectric phase transition temperature because potential barrier substantially lowered so that polarization switching becomes easier. Therefore, more walls appear beneficial for response. Under optimized conditions, a complete set dielectric, elastic, measured [111]c-poled PMN-0.37PT using combined resonance ultrasonic method (CRUM). Both longitudinal N−1) shear (d15 875 are outstanding due wall motions.