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1. WO2020196807 - PIEZOELECTRIC FILM, LAMINATED PIEZOELECTRIC ELEMENT, AND ELECTROACOUSTIC TRANSDUCER

Publication Number WO/2020/196807
Publication Date 01.10.2020
International Application No. PCT/JP2020/013902
International Filing Date 27.03.2020
IPC
H04R 17/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
17Piezo-electric transducers; Electrostrictive transducers
H01L 41/083 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
41Piezo-electric devices in general; Electrostrictive devices in general; Magnetostrictive devices in general; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
08Piezo-electric or electrostrictive elements
083having a stacked or multilayer structure
H01L 41/09 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
41Piezo-electric devices in general; Electrostrictive devices in general; Magnetostrictive devices in general; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
08Piezo-electric or electrostrictive elements
09with electrical input and mechanical output
H01L 41/18 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
41Piezo-electric devices in general; Electrostrictive devices in general; Magnetostrictive devices in general; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
16Selection of materials
18for piezo-electric or electrostrictive elements
H01L 41/257 2013.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
41Piezo-electric devices in general; Electrostrictive devices in general; Magnetostrictive devices in general; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
22Processes or apparatus specially adapted for the assembly, manufacture or treatment of piezo-electric or electrostrictive devices or of parts thereof
253Treating devices or parts thereof to modify a piezo-electric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning
257by polarising
Applicants
  • 富士フイルム株式会社 FUJIFILM CORPORATION [JP]/[JP]
Inventors
  • 三好 哲 MIYOSHI Tetsu
Agents
  • 伊東 秀明 ITOH Hideaki
  • 三橋 史生 MITSUHASHI Fumio
Priority Data
2019-06235928.03.2019JP
2019-15268423.08.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) PIEZOELECTRIC FILM, LAMINATED PIEZOELECTRIC ELEMENT, AND ELECTROACOUSTIC TRANSDUCER
(FR) FILM PIÉZOÉLECTRIQUE, ÉLÉMENT PIÉZOÉLECTRIQUE STRATIFIÉ, ET TRANSDUCTEUR ÉLECTROACOUSTIQUE
(JA) 圧電フィルム、積層圧電素子および電気音響変換器
Abstract
(EN)
The present invention addresses the problem of providing: a piezoelectric film that has superior flexibility under below-freezing environments and that exhibits required flexibility at ordinary temperatures; a laminated piezoelectric element in which the piezoelectric film is laminated; and an electroacoustic transducer utilizing the piezoelectric film or laminated piezoelectric element. The problem is solved by a piezoelectric film: which includes a piezoelectric polymer composite made by dispersing piezoelectric component particles in a matrix containing a polymeric material, and an electrode layer formed on both sides of the piezoelectric polymer composite; and in which the loss tangent at 1 Hz frequency measured by dynamic viscoelasticity has a maximum value of 0.1 or greater in the temperature range from −80°C to less than 0°C, and is at least 0.05 at 0°C.
(FR)
La présente invention aborde le problème consistant à fournir : un film piézoélectrique qui a une flexibilité supérieure dans des environnements de sous-congélation et qui présente une flexibilité requise à des températures ordinaires; un élément piézoélectrique stratifié dans lequel le film piézoélectrique est stratifié; et un transducteur électroacoustique utilisant le film piézoélectrique ou l'élément piézoélectrique stratifié. Le problème est résolu par un film piézoélectrique qui comprend un composite polymère piézoélectrique obtenu par dispersion de particules de composant piézoélectrique dans une matrice contenant un matériau polymère, et une couche d'électrode formée sur les deux côtés du composite polymère piézoélectrique; et dans lequel le facteur de dissipation à une fréquence de 1 Hz mesurée par viscoélasticité dynamique prend une valeur maximale de 0,1 ou plus dans la plage de température de -80°C à moins de 0°C, et est d'au moins 0,05 à 0°C.
(JA)
氷点下の環境下において優れた可撓性を有し、常温でも必要な可撓性を発現する圧電フィルム、この圧電フィルムを積層した積層圧電素子、および、この圧電フィルムまたは積層圧電素子を用いる電気音響変換器の提供を課題とする。高分子材料を含むマトリックス中に圧電体粒子を分散してなる高分子複合圧電体と、高分子複合圧電体の両面に形成された電極層とを有し、動的粘弾性測定による周波数1Hzでの損失正接が、-80℃以上0℃未満の温度範囲に0.1以上となる極大値が存在し、0℃での値が0.05以上である圧電フィルムによって、課題を解決する。
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