Shape memory piezoelectric actuator

The shape memory piezoelectric actuator can be operated using a pulsed voltage, so that small energy consumption and small voltage operation can be realized. To realize shape memory operation, the imprint electrical field was induced by treatment with a high electrical field of 3.5kV∕mm in a 150°C environment. The actuator had two stable positions that were dependent on the piezoelectric polarization and could be maintained without the use of an external electrical field. This shape memory effect indicated that the imprint electrical field contributes to other functional properties, such as a permittivity, optical refractive index, and mechanical compliance.