Ionic transport mechanisms in oxide based glasses in the supercooled and glassy states

Interpretation of electrical polarization and depolarization mechanisms of bioactive glasses in relation to ionic migration

“…The electrical conduction process can be attributed to the ability of the charge carriers to move freely or become more mobile. On the other hand, dependence of the electrical conduction process of sodium silicate glasses on temperature was reported by Souquet et al [16]. The electrical conduction showed two processes of an activated jump mechanism at low temperature and of a free volume cooperative mechanism above the vitreous temperature.…”

“…The conduction process at higher temperatures than the glass transition of 540 C is reportedly to be related to the local deformations of the macromolecular chains [16]. The local deformation allows the transfer of defects to a neighbor position and the cationic mobility to be dominant.…”

Electrical conductivity of iron-bearing silicate glasses and melts. Implications for the mechanisms of iron redox reactions

“…In glass-forming melts the temperature T 0 of eqn (5) is lower than the glass transition temperature T g (Souquet et al, 1998;Hasz and Moynihan, 1991). To determine the temperature range where the VTF law is applicable and, thus, to determine reliably the fit parameters B, and T 0 ( Table 2) we proceeded in two steps.…”

Electrical Conductivity of RuO2–Borosilicate Glasses: Effect of the Synthesis Route

“…The temperature ( T ) dependence of the electrical conductivity (σ) below the glass transition temperature ( T g ) can be represented by an Arrhenius law. For silicate oxide glasses, a single‐jump diffusion mechanism is generally admitted 21,22 . In this hypothesis of diffusion mechanism, the variation of the product σ T with temperature is expressed through where the preexponential factor A is proportional to the charge carrier concentration, and E a is the activation energy associated with the transport mechanism.…”