Electrical conductivity of glasses from the system 0.40Li2O·0.60(xB2O3(1−x)Si2O4) (0 ≤ x ≤ 1) were measured by impedance spectroscopy. The influence of the substitution of the first glass former by the second in electrical conductivity and in the parameters of the Arrhenius expression, i.e., activation energy and pre-exponential factor, was considered. The electrical conductivity increased from the silica to the boron oxide region, with an anomaly at x = 0.3 but with no evidence of a mixed glass-former effect. The relaxation frequency, which was an intrinsic characteristic of each glass sample and was independent of geometrical parameters, was also deduced from impedance diagrams and were also presented for all compositions.

Electrical Conductivity and Relaxation Frequency of Lithium Borosilicate Glasses. L.F.Maia, A.C.M.Rodrigues: Solid State Ionics, 2004, 168[1-2], 87-92