Electric fatigue initiated by surface contamination in high polarization ceramics

Author

Jiang, Qiyue ; Cao, Wanli ; Cross, L.E.

Author_Institution

Pennsylvania Univ., University Park, PA, USA

fYear

1992

fDate

30 Aug-2 Sep 1992

Firstpage

107

Lastpage

110

Abstract

A study of the fatigue behavior of hot-pressed PLZT (La-doped lead zirconate titanate) with composition 7/68/32 under different surface conditions is reported. It is found that the fatigue occurring at a few thousand of cycles is mainly caused by the contaminated surface instead of by intrinsic structure deterioration. For the same gold electrodes, samples with a conventionally cleaned surface showed significant fatigue within 10⁵ switching cycles while samples with surfaces cleaned by an improved procedure did not show fatigue even after 10⁸ switching cycles. The mechanism of fatigue introduced by surface contamination is explained by interface degradation between ceramic and electrode

Keywords

ceramics; dielectric hysteresis; dielectric polarisation; electromechanical effects; fatigue; ferroelectric materials; hot pressing; lanthanum compounds; lead compounds; scanning electron microscope examination of materials; surface structure; surface treatment; Au electrodes; PbLaZrO3TiO3; contaminated surface; conventionally cleaned surface; electric fatigue; high polarization ceramics; hot pressed PLZT; interface degradation; intergranular microcracking; surface conditions; surface contamination; switching cycles; Actuators; Capacitive sensors; Ceramics; Electrodes; Fatigue; Ferroelectric materials; Gold; Hysteresis; Polarization; Surface contamination;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on

Conference_Location

Greenville, SC

Print_ISBN

0-7803-0465-9

Type

conf

DOI

10.1109/ISAF.1992.300635

Filename

300635