Accession Number : AD0717964

Title :   Dispersion Study of Domain Wall Mobility and Mechanical Damping in Pb(Ti,Zr) 03 Transducer Ceramics.

Descriptive Note : Final technical rept. 1 Dec 68-1 Dec 70,

Corporate Author : CLEVITE CORP CLEVELAND OHIO ELECTRONIC RESEARCH DIV

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

Report Date : 21 JAN 1971

Pagination or Media Count : 59

Abstract : Resonant methods were used to measure the properties of Pb(Zr, Ti)O3 ceramics, emphasizing mechanical Q, over the temperature rang -180 degrees C to +165 degrees C, with specimens whose dimensions were chosen to give a frequency range of about 60 kHz to about 850 kHz. The relationships between loss 1/(Q sub M) maxima and minima and possible loss mechanisms are discussed. This temperature dropoff in Q sub M is attributed to increasing conductivity, while increased losses at low temperatures are tentatively ascribed to a phase transition. Some work is also described on quasistatic strain vs. stress measurements. (Author)

Descriptors :   (*FERROELECTRIC CRYSTALS, *FERROELECTRICITY), (*PIEZOELECTRIC TRANSDUCERS, PERFORMANCE(ENGINEERING)), LEAD COMPOUNDS, TITANATES, ZIRCONATES, MANUFACTURING, CERAMIC MATERIALS

Subject Categories : Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE