DISPERSION STUDY OF DOMAIN WALL MOBILITY AND MECHANICAL DAMPING IN Pb(Ti,Zr)O3 TRANSDUCER CERAMICS.

Abstract

Resonant methods were used to measure the properties of Pb(Zr, Ti)O3 ceramics, emphasizing the mechanical Q sub M, over the temperature range -180C to +165C, and including specimens whose dimensions were chosen to give a frequency range of approximately 60 kHz to approximately 850 kHz. Examples of the curves of properties as function of temperature are shown. Loss (1/Q sub M) maxima appear to be outside this temperature-frequency domain for the compositions studied. On the other hand, loss minima (peaks in Q sub M) are often found. High temperature drop off in Q sub M is attributed to increasing conductivity. The mechanisms responsible for the losses at low temperatures are not clear, but may be related to the proximity of a phase transition. Some work is also described on quasi-static strain vs stress measurements. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1970
Accession Number
AD0706793

Entities

People

  • Bernard Jaffe
  • Helmut H. A. Krueger

Tags

DTIC Thesaurus Topics

  • Conductivity
  • Dispersions
  • Domain Walls
  • Frequency
  • Frequency Domain
  • High Temperature
  • Low Temperature
  • Measurement
  • Mobility
  • Phase Transformations
  • Transducers
  • Transition Temperature
  • Transitions

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Thin Film Deposition Science.