Accession Number : AD0706793

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

Descriptive Note : Technical rept. no. 1, 1 Dec 68-1 Dec 69,

Corporate Author : CLEVITE CORP CLEVELAND OHIO ELECTRONIC RESEARCH DIV

Personal Author(s) : Krueger,Helmut H. A. ; Jaffe,Bernard

Report Date : 01 MAY 1970

Pagination or Media Count : 23

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)

Descriptors :   (*CERAMIC MATERIALS, *TRANSDUCERS), LEAD COMPOUNDS, TITANATES, ZIRCONATES, DAMPING, FERROELECTRIC MATERIALS, DIELECTRIC PROPERTIES

Subject Categories : Electrical and Electronic Equipment
      Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE