Title:
PIEZOELECTRIC COMPOSITION
Document Type and Number:
Japanese Patent JP3639881
Kind Code:
B2
Abstract:
PURPOSE: To obtain a piezoelectric composition resistant to fracture even if large strain is developed, improved in piezoelectric properties and mechanical properties, with MgO grains smaller in size than PZT-PMN grains as the matrix phase dispersed homogeneously.
CONSTITUTION: A mixture of PbO, SrCO3, Nb2O5, ZrO2 and TiO2 is first calcinated and then incorporated with MgO of greater grain size followed by conducting a secondary baking to effect homogeneous dispersion of the resultant MgO grains in PZT-PMN grains as the matrix phase, thus obtaining the objective piezoelectric composition consisting of an oxide of perovskite crystal, structure having a composition of the formula Pb1-a-bSra(Mg1/3Nb2/3)xZryTizO3-b (in terms of atom number ratio, 0≤(a)≤0.10; 0.05≤(b)≤0.05; 0.2≤(x)≤0.5; 0.2≤(y)≤0.4; 0.3≤(z)≤0.5; (x+y+z)=1).
Inventors:
Toru Esaki
Masako Kataoka
Takahiro Yamakawa
Shigeru Takahashi
Masako Kataoka
Takahiro Yamakawa
Shigeru Takahashi
Application Number:
JP17543295A
Publication Date:
April 20, 2005
Filing Date:
June 19, 1995
Export Citation:
Assignee:
Taiheiyo Cement Co., Ltd.
International Classes:
C04B35/49; H01L41/187; (IPC1-7): C04B35/49; H01L41/187
Domestic Patent References:
| JP46025824B1 | ||||
| JP8151263A |
Attorney, Agent or Firm:
Masao Tanaka
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