Destruction mechanism of multilayer ceramic actuators

Kenji Uchino, Atsushi Furuta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Scopus citations

Abstract

The destruction mechanism in multilayer ceramic actuators under cyclic electric fields has been investigated. Crack propagation has been observed dynamically using CCD (charge-coupled device) microscopy, and the accompanying characteristics of the induced displacement and acoustic emission were measured simultaneously. The piezoelectric Pb(Ni13/Nb23/)O3-PbTiO3 and the phase-transition-related actuator material (antiferroelectric) PbZrO3-PbSnO3-PbTiO3 exhibit a marked difference in the manner of destruction, probably due to the strain-induction mechanism. In the piezoelectrics, the crack initiated near the edge of the internal electrode and propagated basically in three directions: Two cracks moved toward the outside electrostrictively inactive region, forming an angle of 100 degrees with each other, while the third moved along the ceramic-electrode interface. In antiferroelectrics, the crack began slightly inside the edge of the internal electrode and propagated along the center area between the pair electrodes. Later crack branches were generated around the electrode edge. A very smart actuator system containing a safety feedback function, which can stop an actuator drive safely without causing any serious damage to the work, e.g., in a precision lathe machine, is proposed.

Original languageEnglish (US)
Title of host publicationISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics
EditorsMichael Liu, Ahmad Safari, Angus Kingon, Gene Haertling
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages195-198
Number of pages4
ISBN (Electronic)0780304659, 9780780304659
DOIs
StatePublished - Jan 1 1992
Event8th IEEE International Symposium on Applications of Ferroelectrics, ISAF 1992 - Greenville, United States
Duration: Aug 30 1992Sep 2 1992

Publication series

NameISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics

Conference

Conference8th IEEE International Symposium on Applications of Ferroelectrics, ISAF 1992
CountryUnited States
CityGreenville
Period8/30/929/2/92

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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