Domain contributions to piezoelectricity in ceramics

Author

Arlt, G.

Author_Institution

Inst. fuer Werkstoffe der Elektrotech., Aachen Univ. of Technol.

fYear

1990

fDate

4-7 Dec 1990

Firstpage

733

Abstract

In research on perovskite ceramics it has long been assumed that domain wall motion could contribute considerably to the dielectric constant. In addition, the effects of the 90° domain wall motion have been recognized to contribute to the elastic and piezoelectric constant. A model which describes these contributions phenomenologically is used to separate intrinsic effects from domain wall contributions. The various observations of piezoelectricity at low and high temperatures and at medium and high frequencies which can be attributed to 90° domain wall contributions are discussed in the framework of the model. An analysis of relaxational effects which contribute to all three physical phenomena, i.e. permittivity, elasticity, and piezoelectricity, is given. It is concluded that intrinsic effects cause the observed relaxation

Keywords

ceramics; dielectric relaxation; elastic constants; electric domain walls; permittivity; piezoelectric materials; ceramics; dielectric constant; domain wall motion; elasticity; intrinsic effects; model; permittivity; perovskite ceramics; piezoelectric constant; piezoelectricity; relaxational effects; Aging; Boundary conditions; Ceramics; Crystallization; Dielectric constant; Dielectric measurements; Ferroelectric materials; Grain boundaries; Piezoelectric polarization; Piezoelectricity;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1990. Proceedings., IEEE 1990

Conference_Location

Honolulu, HI

Type

conf

DOI

10.1109/ULTSYM.1990.171463

Filename

171463