PIEZOELECTRIC FILM AND LAMINATED PIEZOELECTRIC ELEMENT

An object of the present invention is to provide a piezoelectric film and a laminated piezoelectric element, in which, in a piezoelectric film including electrode layers and protective layers on both surfaces of a piezoelectric layer containing piezoelectric particles in a matrix containing a polyme...

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Bibliographische Detailangaben
1. Verfasser: MIYOSHI, Tetsu
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:An object of the present invention is to provide a piezoelectric film and a laminated piezoelectric element, in which, in a piezoelectric film including electrode layers and protective layers on both surfaces of a piezoelectric layer containing piezoelectric particles in a matrix containing a polymer material, changes in mechanical properties and electrical properties due to a humidity of an external environment can be reduced. The piezoelectric film includes a piezoelectric layer containing piezoelectric particles in a matrix containing a polymer material, electrode layers provided on both surfaces of the piezoelectric layer, and a protective layer provided on a surface of the electrode layer opposite to the piezoelectric layer, in which the protective layer has a resin substrate and at least one inorganic layer provided on the resin substrate, and a water vapor transmission rate of the piezoelectric film is 1×10−4 g/(m2×day) or less.