Whisker Reinforcement of Piezoelectric Transducer Ceramics.

Abstract

The principle program objective is to effect an increase in the intrinsic dynamic strength of piezoelectric ceramic materials, commonly used in Navy sonar projectors and hydrophones, through the introduction of alpha alumina (sapphire) whiskers into the ceramic matrix. Recent investigations have been concerned with the effect of material blending techniques and manufacturing procedures on the ultimate dynamic strength and piezoelectric properties of 3% by weight whisker reinforced samples of Types I (hard), II (soft), and III (very hard) lead zirconate titanate materials. Test results show increases of 25 to 500% in dynamic strength, improved high temperature stability, reduced dielectric loss, very considerable improvement in dielectric permittivity aging characteristics, and slightly reduced electromechanical coupling and linear behavior to higher drive levels than that obtainable in nonwhisker reinforced counterparts. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 26, 1971
Accession Number
AD0730484

Entities

People

  • Kenneth E. Feith

Tags

DTIC Thesaurus Topics

  • Ceramic Materials
  • Dielectric Permittivity
  • High Temperature
  • Hydrophones
  • Lead Zirconate Titanates
  • Materials
  • Piezoelectric Transducers
  • Sonar Equipment
  • Sonar Projectors
  • Titanates
  • Transducers
  • Zirconates

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Reinforced Composite Materials

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems