Stacked piezoelectric actuator and method of operation

摘要

Disclosed is a stacked piezoelectric actuator displaceable by bending comprising a plurality of piezoelectric ceramic layers stacked on one surface of a core material, and a plurality of piezoelectric ceramic layers stacked on the other surface thereof, said piezoelectric ceramic layers stacked on both surfaces being gradually decreased in thickness outwardly from said core material, or successively increased in piezoelectric constant d31 from inner layers to outer layers, or successively increased in applied voltage from inner layers to outer layers.