Anisotropic piezoelectric effect in modified PbTiO/sub 3/ ceramics

Author

Wersing, Wolfram ; Lubitz, Karl ; Mohaupt, Jutta

Author_Institution

Siemens AG, Munich, West Germany

Volume

36

Issue

4

fYear

1989

fDate

7/1/1989 12:00:00 AM

Firstpage

424

Lastpage

433

Abstract

Experimental and theoretical investigations of the electromechanical anisotropy of ceramics modified with Ca, Ni-Nb, and Mn are presented. It is demonstrated that the large anisotropy of these ceramics is neither a bulk property of the PbTiO/sub 3/-crystallites nor a domain wall effect. The anisotropy is caused by the statistical orientation of the crystallites in the ceramics and by the material properties due to this orientation. The ratio of electrostrictive coefficients and the ratio of single-crystal permittivities in these ceramics also play a decisive role. The result enables one to comprehend easily the dependence of the ceramic´s electromechanical anisotropy on the material composition, the degree of poling, and the temperature.<>

Keywords

ceramics; electromechanical effects; lead compounds; piezoelectric materials; thermal expansion; PbTiO/sub 3/:Ca; PbTiO/sub 3/:Mn; PbTiO/sub 3/:Ni,Nb; anisotropic piezoelectric effect; ceramics; electromechanical anisotropy; electrostrictive coefficients; material composition; poling; single-crystal permittivities; statistical crystallite orientation; thermal expansion; Anisotropic magnetoresistance; Ceramics; Composite materials; Crystalline materials; Crystallization; Electrostriction; Material properties; Permittivity; Piezoelectric effect; Temperature dependence;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.31779

Filename

31779