Volume 2, Issue 6, November 2013, Page: 173-178
Dielectric Relaxation, Ionic Conduction and Complex Impedance Studies on NaNo3 Fast Ion Conductor
T. Vijay kumar, Department of Physics, Arjun College of Technology and Sciences, JNTUH, India
A. Sadananda Chary, Dept. of Physics, University College of Science, Osmania University, Hyderabad, India
Suresh Bhardwaj, Thermodynamics Lab, UGC DAE Consortium, Indore, India
A. M. Awasthi, Thermodynamics Lab, UGC DAE Consortium, Indore, India
S. Narender Reddy, Dept. of Physics, University College of Engineering, Osmania University, Hyd, India
Received: Sep. 22, 2013;       Published: Oct. 30, 2013
DOI: 10.11648/j.ijmsa.20130206.12      View  4116      Downloads  328
Abstract
AC conductivity, dielectric constant, loss and electric modulus of Sodium nitrate system have been studied in the frequency range from 1Hz to 10MHz and in the temperature range from 303 K to 563 K by employing impedance spectroscopy. The frequency dependent ac conductivity follows Jonscher’s universal power law. Dimensionless frequency exponent (n), dispersion parameter (A) are determined. The change over frequency independent conductivity to frequency dependent conductivity at all temperatures shows the relaxation mechanism. The variation of real part of dielectric constant with frequency shows strong dispersion at low frequencies and saturation at high frequencies. The presence of peaks in the frequency plots of dielectric loss, imaginary parts of impedance and modulus are attributed to the relaxation processes. It is also confirmed by the temperature dependence study of real part of dielectric constant. The activation energy from relaxation processes and conductivity has been evaluated.
Keywords
Solid Electrolyte, Fast Ion Conductor, Relaxation, Ac Conductivity
To cite this article
T. Vijay kumar, A. Sadananda Chary, Suresh Bhardwaj, A. M. Awasthi, S. Narender Reddy, Dielectric Relaxation, Ionic Conduction and Complex Impedance Studies on NaNo3 Fast Ion Conductor, International Journal of Materials Science and Applications. Vol. 2, No. 6, 2013, pp. 173-178. doi: 10.11648/j.ijmsa.20130206.12
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