A phenomenological hysteresis and enhanced ionic conductivity of solid electrolyte Ba(NO3)2-KNO3 mixed crystals

Ionic conductivity measurements are made in pellets of pure Ba(NO3)2, KNO3 and in different compositions of Ba(NO3)2-KNO3 mixed crystals in the temperature range from about 100oC to 500oC. The conductivity versus temperature plots in these crystals are drawn for both heating and cooling. All these plots showed four regions and are reversible and have hysteresis. The activation energies are calculated for all the compositions and these are found to be decreasing with increasing mole percnt of KNO3 in Ba(NO3)2. Conductivity attains maximum value for a certain intermediate composition

Author(s): S. Shashi Devi1 and A. Sadananda Chary2

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