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    • Keywords


      Conducting ceramic; ionic conductor; sodium beta alumina; solid electrolyte

    • Abstract


      Beta alumina solid electrolyte is a potential candidate in the fabrication of Na-S batteries. In the present study, it has been prepared in the form of discs by uniaxially as well as isostatically pressing and sintering in the temperature range 1585–1630°C, the highest sintered density of 3·25 g/cm3 has been achieved in the samples isostatically pressed and sintered at 1630°C. X-ray analysis of the samples shows formation ofβ″-phase. Microstructure of the sintered samples reveals some darker regions which are attributed to low soda content. Resistivity at 300°C measured by the two-probe method at a frequency of 1 MHz on samples having vacuum-deposited silver electrodes is 15 ohm-cm, which is slightly higher than the value of 5–13 ohm-cm reported in literature using molten sodium electrodes. The activation energy of conductivity is 0·24 eV which is comparable to the literature value of 0·24–0·35 eV.

    • Author Affiliations


      H S Kalsi1 R P Tandon1 Balbir Singh1 R C Goel1 B K Das1

      1. National Physical Laboratory, New Delhi - 110 012, India
    • Dates

  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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