Electrical Conduction in Alkali Borate Glasses; a Unique Dependence on the

Concentration of Modifier Ions. H.Doweidar, Y.M.Moustafa, G.M.El-Damrawi,

R.M.Ramadan: Journal of Physics - Condensed Matter, 2008, 20[3], 035107

The electrical conduction of Li2O–B2O3, Na2O–B2O3 and K2O–B2O3 glasses seems,

at first sight, to be dominated by the activation energy. Regardless of the size of the

alkali ion, there was a unique dependence of conductivity, at a certain temperature,

on the alkali–alkali distance and thus on N (number of ions per cm3). The linear

dependence of log[σ] on N−3/2 for all types of alkali ions revealed that N was the

basic parameter that determines the conductivity at a certain temperature. A

derived semi-empirical relation can be used to calculate the conductivity as a

function of N and temperature.

Electrical Conduction in Alkali Borate Glasses; a Unique Dependence on the

Concentration of Modifier Ions. H.Doweidar, Y.M.Moustafa, G.M.El-Damrawi,

R.M.Ramadan: Journal of Physics - Condensed Matter, 2008, 20[3], 035107