THERMAL-PROPERTIES OF LI CONDUCTING SUPERIONIC MATERIALS

We have measured the thermal conductivity and heat capacity of: quasi-one-dementional superionic conductors alpha - LiJO(3) and Li2B4O7 from 100K to 500K using a transient hot wire method. The temperature dependence changes from T-1 at the lowest temperatures to T-2 below the phase transition at 242K and 238K respectively Above this phase transition where alpha-LiJO(3) and Li2B4O7 are a superionic conductors we see a week temperature increasing of thermal conductivity. Such behaviour of last one in superionic state is determined with increasing of heat capacity in this region.