A New Composite Ceramic Piezoelectric Transducer Material.

Abstract

A new whisker reinforced piezoelectric ceramic was made which exhibits good properties as a trasducer material. The most successful material to date is a lead zirconate titanate composite with a sapphire whisker additive, prepared by a cold press and sinter technique. Measurement of the dielectric permittivity, dielectric loss tangent, electromechanical coupling factor, and mechanical Q are reported for some of these first available samples. Indications are that whisker containing samples undergo different aging processes than nonwhisker containing samples, as indicated by the activation energy for domain wall motion. Measurements of the pyroelectric effect indicate that the whisker containing samples are under large compressive stresses at room temperature. Some comments on possible advantageous properties of this new material are presented. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1970
Accession Number
AD0714494

Entities

People

  • William W. Lester

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Composite Materials
  • Dielectric Permittivity
  • Domain Walls
  • Heat Of Activation
  • Lead Zirconate Titanates
  • Magnetic Materials
  • Materials
  • Measurement
  • Piezoelectric Transducers
  • Titanates
  • Transducers
  • Zirconates

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems