International Center For Actuators And Transducers

Abstract

(1) There are three loss origins in piezoelectrics: dielectric, elastic and piezoelectric losses. 180 deg and non-180 deg domain wall motions contribute primarily to the dielectric and elastic losses, respectively. (2) Heat generation occurs in the sample uniformly under an off-resonance mainly due to the intensive dielectric loss, while heat is generated primarily at the vibration nodal points via the intensive elastic loss under a resonance. (3) Doping rare-earth ions into PZT-Pb(Mn,X)O3 (X = Sb, Nb) ceramics increases the maximum vibration velocity up to 0.9 m/s, which corresponds to one order of magnitude higher energy density than conventionally commercialized piezo-ceramics. (4) To obtain stabilized high vibration velocity, domain wall stabilization via the positive internal bias field (rather than local domain wall pinning) seems to be essential.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2003
Accession Number
ADA429613

Entities

People

  • Kenjl Uchino

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Ceramic Materials
  • Chemistry
  • Construction
  • Electromagnetic Fields
  • Fabrication
  • Manufacturing
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Microelectromechanical Systems
  • Micromachining
  • Phase Transformations
  • Piezoceramics
  • Piezoelectric Effect
  • Piezoelectric Materials
  • Transducers

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Mathematics or Statistics
  • Structural Dynamics.