Patent ID: 8575823

Claim:
A laminated piezoelectric material comprising a four-layered piezoelectric material and electrode layers for applying a voltage to each layer of the four-layered piezoelectric material, wherein each piezoelectric material of the four-layered piezoelectric material comprises an inorganic piezoelectric material as a principal component and has a remanent polarization in a thickness direction, and the layer of the four-layered piezoelectric material is laminated so that, a direction of an electric field counters to a direction of the remanent polarization in only one of the piezoelectric material of the four-layered piezoelectric material and the direction of the electric field coincides with the direction of the remanent polarization in other three layers, or the direction of the electric field coincides with the direction of the remanent polarization in only one of the piezoelectric material of the four-layered piezoelectric material and the direction of the electric field counters to the direction of the remanent polarization in other three layers, when the voltage is applied to each piezoelectric material of the four-layered piezoelectric material via the electrode layers.