Relaxor Ferroelectrics for Electrostrictive Transducers: Electrostrictive Strain/Dielectric Properties of Relaxor Ferroelectrics

Abstract

The electrostrictive actuator and nonresonant transducer capabilities of relaxor ferroelectrics have been of practical interest for the last decade. Displacement transducers from materials which have large elecrostrictive effects are advantageous for several reasons: (1) The field-induced deformations (strains) are more stable than in piezoelectric ceramics (relaxation processes are minor and they do not evidence aging from macrodomain-defect interactions), (2) Hysteresis in the strain-field dependence is reduced over a wide temperature range. The original dimension is returned to rapidly after removal of the polarizing field (reduced creep and strain offset), and (3) Thermal expansion effects are quite small in the relevant temperature range of maximum dielectric permittivity.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1991
Accession Number
ADA241019

Entities

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Capacitance Bridges
  • Dielectric Permittivity
  • Dielectric Properties
  • Electric Fields
  • Electromagnetic Fields
  • Ferroelectric Materials
  • Frequency
  • Hysteresis
  • Materials
  • Polarization
  • Space Charge
  • Strain Gages
  • Thermal Expansion
  • Transducers
  • Transverse

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Mathematics or Statistics