Temperature Compensated Piezoelectric Materials

Abstract

From the electrostriction measurements on SBN crystals, it was found that the fourth order electrostrictive coupling terms are not adequate to fully describe the paraelectric phase above Curie temperature, and hence six rank coupling terms are needed; the electrostrictive coupling terms do not change markedly with cation substitution. Results of SAW measurements on the SBN:60 crystal showed that this composition possesses temperature-compensated orientations and it is similar to other best-known bronze composition PKN. Efforts are being made to establish acoustical losses correctly for this composition and based on this information, necessary changes in crystal composition will be made. The liquid phase epitaxial growth work has been shown to be successful not only for the Sr.5Ba.5Nb206, but other important bronze composition Sr2KNb5015 (hetero-epitaxial growth) onto the various orientations of the SBN crystal. Efforts are under way to establish their piezoelectric and acoustical properties.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1982
Accession Number
ADA111900

Entities

People

  • L. E. Cross
  • R. R. Neurgaonkar

Tags

DTIC Thesaurus Topics

  • Acoustic Waves
  • Chemistry
  • Crystal Growth
  • Crystals
  • Curie Temperature
  • Dielectric Permittivity
  • Dielectric Properties
  • Diffraction
  • Epitaxial Growth
  • Liquid Phases
  • Materials
  • Measurement
  • Optical Properties
  • Phase Diagrams
  • Thin Films
  • Transitions
  • X-Ray Diffraction

Readers

  • Materials Science and Engineering.
  • Systems Analysis and Design