Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
76 (1994), S. 455-465
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Vector impedance measurements of radial modes of thin disks (diameter 13 mm and thickness 1 mm) of Pb(Zr0.515Ti0.485)O3 doped with Cr2O3 have been carried out using an impedance analyzer. Piezoelectric equivalent circuit parameters R, L, Ca in series, and Cb in parallel have been measured by simulating ||Z|| and θ plots. Piezoelectric parameters for the first four radial modes have been obtained and it is found they peak at about 0.32 mol % of Cr2O3. The piezoelectric coupling coefficient Kp has been correlated with the dielectric constant. The dielectric quality factor Qe and mechanical quality factor Qm have been measured and (Qe/Qm)〈1. ac conductivity follows a frequency power law with exponent p〈1, suggesting that the hopping mechanism may be responsible for the dielectric loss.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.357096
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