Title:
POLYMER COMPOSITE PIEZOELECTRIC BODY AND PIEZOELECTRIC FILM
Document Type and Number:
WIPO Patent Application WO/2020/261963
Kind Code:
A1
Abstract:
Provided are a polymer composite piezoelectric body and a piezoelectric film configured for high productivity and capable of suppressing the loss of piezoelectric conversion efficiency under harsh temperature/humidity conditions. The polymer composite piezoelectric body contains piezoelectric particles in a matrix including a polymer material, has a SP value of less than 12.5 (cal/cm3)1/2, and contains, in terms of mass ratio, more than 500 ppm but not more than 10,000 ppm of a substance that is liquid at a normal temperature. Voids are formed in the polymer composite piezoelectric body, and the area ratio of voids with respect to the cross section of the polymer composite piezoelectric body is 0.1-20%.
Inventors:
TSURUOKA TAKUMI (JP)
Application Number:
PCT/JP2020/022535
Publication Date:
December 30, 2020
Filing Date:
June 08, 2020
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R17/00; H01L41/09; H01L41/18; H01L41/193; H01L41/257; H04R17/02
Foreign References:
| JP2016063286A | 2016-04-25 | |||
| JP2007017420A | 2007-01-25 | |||
| JP2018056287A | 2018-04-05 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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