The conductivities of these composites were compared with those of the pure nitrates. It was found that the conductivity isotherms exhibited maxima, at alumina contents of between 40 and 60%, with magnitudes of about 0.01S/cm at 500K. These values were 103 to 105 times higher than those for the pure nitrate. The temperature dependences of the conductivity had non-linear Arrhenius plots. It was suggested that the marked change in the properties of nitrates in composites was due to the stabilization of amorphous high-conductivity nitrate phases which formed due to interface interactions between the components.

N.F.Uvarov, E.F.Hairetdinov, I.V.Skobelev: Solid State Ionics, 1996, 86-88[1], 577-80