Domain switching and microcracking during poling of lead zirconate titanate ceramics

E. C. Subbarao, V. Srikanth, W. Cao, L. E. Cross

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

The application of a DC electric field (poling) to a ferroelectric lead zirconate titanate (PZT) ceramic aligns domains in the field direction. The non 180°-domain switches involve mechanical deformations, which are detected as acoustic emission signals. Concurrent with AE signals, electrical current pulses arise from domain reorientations. When the poling field is large and domain switches are extensive, the resulting deformations, under the constraint of neighboring domains or grains, may exceed the elastic limit and cause microcracking. The onset and propagation of microcracking during poling of PZT is signalled by the appearance of continuous AE signals, unaccompanied by current pulses, in contrast to intermittent AE signals accompanied by corresponding current pulses during domain switching. The onset and extent of microcracking established by this method is confirmed by scanning electron micrographs and decrease in the value of piezoelectric coefficient (d33) and mechanical quality factor (QM). The amplitude of AE signals due to domain switches are spread widely, while that of AE signals caused by microcracking occur in a narrow range around 50 db.

Original languageEnglish (US)
Pages (from-to)271-281
Number of pages11
JournalFerroelectrics
Volume145
Issue number1
DOIs
StatePublished - Aug 1993

Fingerprint

Microcracking
ceramics
Switches
switches
Acoustic emissions
Ferroelectric materials
pulses
Crack propagation
Lead
Electric fields
Scanning
acoustic emission
lead titanate zirconate
Electrons
retraining
Q factors
direct current
scanning
propagation
electric fields

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Subbarao, E. C. ; Srikanth, V. ; Cao, W. ; Cross, L. E. / Domain switching and microcracking during poling of lead zirconate titanate ceramics. In: Ferroelectrics. 1993 ; Vol. 145, No. 1. pp. 271-281.
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Domain switching and microcracking during poling of lead zirconate titanate ceramics. / Subbarao, E. C.; Srikanth, V.; Cao, W.; Cross, L. E.

In: Ferroelectrics, Vol. 145, No. 1, 08.1993, p. 271-281.

Research output: Contribution to journalArticle

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