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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.50 [2012] >
IJPAP Vol.50(06) [June 2012] >
| Title: | Characterization of dielectric dispersion and ionic conduction behaviour of acetonitrile at low frequencies |
| Authors: | Choudhary, Shobhna
Sengwa, R J |
| Keywords: | Acetonitrile
Dielectric properties
Ionic conductivity
Relaxation time
Activation energy |
| Issue Date: | Jun-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The complex dielectric function, ionic conductivity and impedance behaviour
of acetonitrile have been investigated over the frequency range 20 Hz-1 MHz and
at the temperatures 15, 30 and 45°C. The real part of complex
dielectric function increases significantly with the decrease of frequency
below 100 kHz, confirms the contribution of electrode polarization effect in
the dielectric properties of acetonitrile at low frequencies. The real part of
alternating current conductivity shows the direct current ionic conductivity
plateau in the frequency range 1 kHz-1 MHz. The complex impedance plane plots
have been used to separate the electrode polarization effect from the bulk
acetonitrile properties. The values of temperature dependence electrode
polarization relaxation time have been determined from the frequency which corresponds
to the peaks observed in the dielectric loss tangent spectra. The activation
energies of relaxation time, conductivity and viscosity have been evaluated
from their Arrhenius plots, and discussed in relation to the ionic conduction
mechanism in the pure liquid state of acetonitrile. |
| Page(s): | 411-414 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.50(06) [June 2012]
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