Title:
圧電発電素子、及び圧電発電素子の発電量推定方法
Document Type and Number:
Japanese Patent JP5578575
Kind Code:
B2
Abstract:
Provided is a piezoelectric generating element having an electrode on an outer surface of a piezoelectric ceramic body, wherein the piezoelectric ceramic body has a relative permittivity of 110 to 1700, an elastic compliance of 15 to 150 pm2/N, and a void ratio of 20 to 75%. Preferably, the void ratio is 50 to 75% in the piezoelectric generating element. A crystal particle is modeled as a cube with a length X on a side, a virtual void portion is provided in cube, a void ratio x is calculated based on a thickness t of a frame excluding void portion, a relative permittivity epsilonr and an elastic compliance s are calculated based on void ratio x, and a power generation amount P is estimated. Thereby, a piezoelectric generating element capable of significantly increasing a power generation amount more than before, and a method for estimating a power generation amount of the piezoelectric generating element can be obtained.
Inventors:
Tomoshi Wada
Application Number:
JP2011230753A
Publication Date:
August 27, 2014
Filing Date:
October 20, 2011
Export Citation:
Assignee:
Murata Manufacturing Co., Ltd.
TDK Corp.
Fuji Ceramics
セラテック, Inc. engineering
TDK Corp.
Fuji Ceramics
セラテック, Inc. engineering
International Classes:
H01L41/113; H01L41/187; H01L41/22; H01L41/257; H01L41/39; H01L41/43
Attorney, Agent or Firm:
Kunihiro Yasutoshi