Laminated piezoelectric element

Abstract

Provided is a laminated piezoelectric element capable of suppressing heat generation while maintaining satisfactory piezoelectric characteristics. The laminated piezoelectric element is a laminated piezoelectric element including a piezoelectric film, in which the laminated piezoelectric element is obtained by laminating a plurality of layers of piezoelectric films each including a piezoelectric layer containing a polymer-based piezoelectric composite material that contains piezoelectric particles in a matrix containing a polymer material, and electrode layers formed on both surfaces of the piezoelectric layer, and in a case where a value obtained by dividing a capacitive reactance Xc of the piezoelectric film at a frequency of 1 kHz by an equivalent series resistance ESR is set to 1, a value XE20 obtained by dividing the capacitive reactance Xc at a frequency of 20 kHz by the equivalent series resistance ESR is in a range of 0.6 to 1.5.

Dependencies are inferred from the claim text.