Development and electromechanical properties of multimaterial piezoelectric and electrostrictive PMN-PT monomorph actuators

A. Hall, M. Allahverdi, E. K. Akdogan, A. Safari

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Monolithic multimaterial monomorphs, comprised of varying ratios of piezoelectric 0.65Pb(Mg 1/3 Nb 2/3)O 3-0. 35PbTiO 3 to electrostrictive 0.90Pb(Mg 1/3Nb 2/3)O 3-0.10PbTiO 3, have been co-fired at 1150°C. The relative permittivity, displacement, and polarization hysteresis were investigated for varying ratios of piezoelectric to electrostrictive material. The permittivity of the 1:1 multimaterial monomorphs followed the dielectric mixing laws, showing a dielectric constant of 5,500 at room temperature. The P-E hysteresis loop of the 1:1 sample exhibited a maximum and remnant polarization slightly less than the piezoelectric PMN-PT 65/35, but higher than the electrostrictive PMN-PT 90/10. Displacement was found to be higher for the 3:1 monolithic monomorph actuators, reaching 76 μ m at 6 kV/cm. The results indicate that by minimizing the electrostrictive layer thickness the tip displacement can be substantially increased while maintaining a lower hysteresis than that of the purely piezoelectric counterpart.

Original languageEnglish (US)
Pages (from-to)143-150
Number of pages8
JournalJournal of Electroceramics
Volume15
Issue number2
DOIs
StatePublished - Nov 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Ceramics and Composites
  • Materials Chemistry
  • Electrical and Electronic Engineering

Keywords

  • Displacement
  • Hysteresis
  • Monomorph actuators
  • Permittivity
  • Piezoelectric and electrostrictive PMN-PT

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