DC conductivity of Fe2O3–Bi2O3–B2O3 glasses

Characterization and transport properties of V2O5–Fe2O3–TeO2 glasses

“…The dc conductivities of transition metal oxide (TMO), glasses have been targeted for extensive studies [1][2][3][4][5][6][7] because of their interesting semiconducting properties as well as for their probable technological applications. The conduction mechanism in these glasses was presumed to be by the small polaron hopping (SPH) process [8,9].…”

Electrical conductivity and dielectric properties of Bi2O3–GeO2–PbO–MoO3 glasses

“…where W p is the polaron binding energy and (1/ε p ) = (1/ε ∞ ) − (1/ε ο ), and ε°and ε ∞ are the static and high-frequency dielectric constant of the glass, respectively, Using W H , r p and R values, we estimated ε p = 16.71-16.22 Table 2, which is higher than the estimated for the glass system (ε p = 2.53-5.63) [27].…”

Dielectric and structural properties of SiO2-LiFe5O8 glass–ceramics prepared by sol–gel processing

“…Nevertheless, Phanjoubam et al [16], presents a model where some Fe 3+ ions can be present in the glass matrix in octahedral environment (i.e., network modifier) [17,18], contributing also to the ionic conductivity. Therefore, in the 94Si samples, the observed increase of the r dc , with the increase of the heat-treatment temperature ( Table 1), can be assigned to an increase of the volume ratio between the iron-based particles and the glass matrix [15]. Qiu et al [15] propose that the rise of the Fe 2+ ion content, will causes a decrease in activation energy [15], which seems to be the same behaviour on these samples (Fig.…”

“…Therefore, in the 94Si samples, the observed increase of the r dc , with the increase of the heat-treatment temperature ( Table 1), can be assigned to an increase of the volume ratio between the iron-based particles and the glass matrix [15]. Qiu et al [15] propose that the rise of the Fe 2+ ion content, will causes a decrease in activation energy [15], which seems to be the same behaviour on these samples (Fig. 3, Table 1).…”