A dramatic reduction in the sintering temperature of the refractory sodium β′′-alumina solid electrolyte <i>via</i> cold sintering

Abstract

The refractory solid electrolyte, sodium beta alumina, is cold sintered at 375 °C which is over 1000 °C lower than conventional sintering. A relative density above 90% and an ionic conductivity of 10 −3 S cm −1 (300 °C) is obtained.