• Frequency-dependent electrical behaviour of Na$_2$SiO$_3$: a brief report

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    • Keywords


      Sintering; complex impedance; grain polarization; ac conductivity; dielectric dispersion.

    • Abstract


      The present study reports the frequency-dependent electrical properties of sodium silicate (Na$_2$SiO$_3$) (SS) at different temperatures to understand the contribution of grain and grain boundary polarization to its electricalresponse at a lower frequency region. The low-frequency dielectric dispersion and non-Debye-type dielectric relaxation are attributed to polaron hopping that controls the complex impedance of SS. A single semi-circular arc in Nyquistplot indicates a dominance of grain boundary polarization in the relaxation mechanism. The analysis of frequency dependent ac conductivity in the studied temperature regime can be used to define the correlated barrier hoppingmodel.

    • Author Affiliations



      1. Department of BS and HU (Physics), Asansol Engineering College, Asansol 713305, India
    • Dates

  • Bulletin of Materials Science | News

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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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