Electrical conductivity of a sintered pellet of octalithium zirconate

The conductivity of a sintered pellet of Li₈ZrO₆ was measured in dry or wet argon atmosphere by the two-terminal technique with an AC Wheatstone bridge in the temperature range 350–1050 K. The temperature dependence of conductivity multiplied by temperature $\text{(σT)}$ of Li₈ZrO₆ in a dry environment had two transition points at 426 and 833 K. The activation energies of conductivity in high, middle and low temperature regions were 103.2, 52.1 and 37.4 kJ/mol, respectively. The activation energies of conductivity agreed well with those obtained by temperature dependence of spin-lattice relaxation time $\text{T}{}_1$ of ⁷Li with pulsed nuclear magnetic resonance.