Frequency effect on electrical fatigue behaviour of lead zirconate titanate ceramics

Author

Pojprapai, S. ; Luo, Zhengqian ; Yimnirun, R.

Author_Institution

Sch. of Ceramic Eng., Suranaree Univ. of Technol., Nakorn Ratchasima, Thailand

Volume

48

Issue

17

fYear

2012

Firstpage

1062

Lastpage

1064

Abstract

The frequency effect on the electrical fatigue behaviour of lead zirconate titanate (PZT) ceramics for a micro-actuator of hard disk drives has been investigated. The PZT sample was subjected to a bipolar electric field of ±1 kV/mm at various frequencies; 10, 50, 100 Hz. The fatigue behaviour could be attributed to the domain pinning effect and is well quantitatively analysed by using the ferroelectric logarithmic fatigue model. Significantly, it was found that fatigue degradation is more severe at low frequency loading. The frequency effect on the fatigue behaviour was explained using the viscosity concept.

Keywords

dielectric hysteresis; electric domains; ferroelectric ceramics; ferroelectric switching; lead compounds; viscosity; PZT; bipolar electric field; domain pinning effect; electrical fatigue; fatigue degradation; ferroelectric logarithmic fatigue model; frequency 10 Hz; frequency 100 Hz; frequency 50 Hz; frequency effect; hard disk drives; lead zirconate titanate ceramics; microactuator; viscosity;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2012.1625

Filename

6272452