Polymer-based piezoelectric composite material, piezoelectric film, piezoelectric speaker, and flexible display

Abstract

The present invention provides a polymer-based piezoelectric composite material from which a piezoelectric film capable of outputting a higher sound pressure is obtained in a case of using a piezoelectric speaker, a piezoelectric film formed of the polymer-based piezoelectric composite material, and a piezoelectric speaker and a flexible display which are formed of the piezoelectric film. The polymer-based piezoelectric composite material of the present invention is a polymer-based piezoelectric composite material including a polymer matrix which contains a polymer having a unit represented by Formula (1), and at least one unit selected from the group consisting of, a unit represented by Formula (2-1), a unit represented by Formula (2-2), and a unit represented by Formula (2-3), and piezoelectric particles. (MOx/2)  Formula (1) (R1SiO3/2)  Formula (2-1) (R22SiO2/2)  Formula (2-2) (R33SiO1/2)  Formula (2-3)

Dependencies are inferred from the claim text.