Characterization, Ionic Conductivity and Impedance studies of Potassium Nitrate

Authors

  • A. Raju, Venkata Ramana Jeedi, Mallaiah Yalla, R. Swarnalatha, S. Narender Reddy, A. Sadananda Chary

Abstract

Potassium nitrate (KNO3) sample is prepared by melt quench method and structural investigations were carried out through XRD, FTIR, and SEM. Using the complex impedance spectrometer, ionic conductivity is measured in the frequency range between 50Hz and 5MHz from room temperature to 523K. Conductivity increased with increase in temperature, the maximum conductivity value 5.89×10-6S cm-1 is recorded at 523K. The conductivity with frequency followed Jonscher’s universal power law. The dispersion parameter A and frequency exponent S are estimated. Conductivity is attributed to relaxation mechanism. Ionic transport number is also evaluated through Wagner’s polarization method.

Keywords- Battery; ionic conductivity; impedance spectroscopy; relaxation mechanism;

Published

2020-12-21

Issue

Section

Articles