Paper Title:
Electromechanical Coupling Characteristics of SMA Wires under the Constraints of Stress and Strain
  Abstract

AC and DC conductivities have been measured by using the real (e¢) and imaginary (e¢¢) parts of the dielectric constant data of glass and glass-ceramics (GC) at different temperatures in the rage 297-642K and in the frequency range 100 Hz to 10 MHz. Using Anderson –Stuart model, we have calculated the activation energy, which is observed to be lower than that of the DC conductivity. The analysis for glass/glass-ceramics indicates that the conductivity variation with frequency exhibits an initial linear region followed by nonlinear region with a maximum in the high-frequency region. The observed frequency dependence of ionic conductivity has been analyzed within the extended Anderson–Stuart model considering both the electrostatic and elastic strain terms. In glass/glassceramic the calculations based on the Anderson-Stuart model agree with the experimental observations in the low frequency region but at higher frequencies there is departure from measured data.

  Info
Periodical
Key Engineering Materials (Volumes 280-283)
Edited by
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Pages
915-918
DOI
10.4028/www.scientific.net/KEM.280-283.915
Citation
S. Z. Yan, F. Xu, X. J. Liu, J. H. Wang, "Electromechanical Coupling Characteristics of SMA Wires under the Constraints of Stress and Strain", Key Engineering Materials, Vols. 280-283, pp. 915-918, 2005
Online since
February 2007
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