Electroacoustic conversion film and electroacoustic converter
AssigneeFUJIFILM Corporation
InventorJumpei ISHIDA
Life of this patent
Estimating the term…
Abstract
Provided are an electroacoustic conversion film and an electroacoustic converter which are capable of suppressing a decrease in piezoelectric conversion efficiency in a case of use in a high-temperature environment. The electroacoustic conversion film is an electroacoustic conversion film including a polymer-based piezoelectric composite material which contains piezoelectric particles in a matrix containing a polymer material, and electrode layers which are formed on both surfaces of the polymer-based piezoelectric composite material, in which the electroacoustic conversion film has a thermal expansion coefficient of 12 ppm/° C. to 100 ppm/° C.
Claims20
An electroacoustic conversion film comprising:
- a polymer-based piezoelectric composite material which contains piezoelectric particles in a matrix containing a polymer material;
- and
- electrode layers which are formed on both surfaces of the polymer-based piezoelectric composite material,
- wherein the electroacoustic conversion film has a thermal expansion coefficient of 12 ppm/° C. to 100 ppm/° C.
An electroacoustic converter comprising:
- an electroacoustic conversion film which includes a polymer-based piezoelectric composite material containing piezoelectric particles in a matrix containing a polymer material and electrode layers which are formed on both surfaces of the polymer-based piezoelectric composite material;
- and
- a vibration plate which is laminated on the electroacoustic conversion film,
- wherein the electroacoustic converter has a thermal expansion coefficient of 12 ppm/° C. to 100 ppm/° C.
Dependencies are inferred from the claim text.