Derivation of a relation between the activation energies of ionic conductivity in the glassy and molten states of glass-forming ionic conductors: an application to silver iodide–silver selenate

@inproceedings{Ngai1999DerivationOA,
  title={Derivation of a relation between the activation energies of ionic conductivity in the glassy and molten states of glass-forming ionic conductors: an application to silver iodide–silver selenate},
  author={K L Ngai},
  year={1999}
}
In the glassy state of glass-forming ionic conductors, the temperature dependence of dc conductivity σ is Arrhenius with a constant activation energy, Eσ,. High above the glass transition temperature where σ is approaching a level of 1 Ω−1 cm−1 and the corresponding conductivity relaxation times τσ are of the order of 1 ps, the apparent activation energy of σ, Ea, is significantly smaller than Eσ. In a previous study it was shown that the ratio, Ea/Eσ, is nearly equal to the fractional exponent… CONTINUE READING