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  • 1
    Electronic Resource
    Electronic Resource
    Dielectric and piezoelectric properties of lead zirconate titanate doped with chromium oxide (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 455-465 
    Details
    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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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Flow of elasto-viscous fluid past an accelerated porous plate (1984)
    Springer
    Astrophysics and space science 106 (1984), S. 41-45 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The flow problem of an elasto-viscous liquid (Walter-B type) due to impulsively accelerated motion of an infinite porous plate is considered. The effect of suction and flow parameters is analysed. It is found that at a fixed time the fluid velocity and skin friction at any point decrease with the increase in suction and fluid elastic parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00653912
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    Paper (German National Licenses)
    Fulltext
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