The conductive behaviour of silver vanadium–molybdenum tellurite glasses

Induced crystallization and physical properties of Li2O–CaF2–P2O5:TiO2 glass system

“…Thus Fig. 7 and its insets suggest a kind of transition from predominantly electronic (zone I, for x < 0.6 mol%) to ionic (zone II for x > 0.6 mol%) conductivity [25]. Two types of explanations are possible for this kind of behaviour of conductivity with the concentration of TiO 2 : (i) the mobile electrons or polarons in the process of transfer from Ti 4+ to Ti 3+ are attracted by the oppositely charged Li + ions.…”

“…The plot between ε (T) and ε (T) given by Eqs. (5) and (6) at a fixed frequency is often called a pseudo Cole-Cole plot, which cuts ε axis at ε s and ε ∞ . Here ε s is known as the high temperature dielectric constant (in contrast to the low frequency dielectric constant in the conventional Cole-Cole plot) and similarly ε ∞ is the low temperature dielectric constant.…”

“…Work along these lines has been carried out in recent years on a variety of inorganic glass systems yielding valuable information [1][2][3][4][5]. In the Part I of this paper, the techniques in detail on preparation of the samples, characterization (that include X-ray diffraction, scanning electron microscopy and differential thermal analysis), spectroscopic properties (IR and Raman) and elastic properties of these samples were reported.…”

Dielectric dispersion in Li2O–MoO3–B2O3 glass system doped with V2O5

“…12). The figure obviously suggests a kind of transition from predominantly ionic to electronic conductivity [46]. With the entry of highly mobile Li + ions in to the glass Fig.…”

Photostimulated optical effects and some related features of CuO mixed Li2O–Nb2O5–ZrO2–SiO2 glass ceramics

“…15) exhibits a maximum at x = 0.2 mol%. Though electronic and ionic conductivities are not separated but the observed trend of increase of conductivity and decrease of activation energy for x < 0.2 mol% and, decrease of conductivity and increase of activation energy for x > 0.2 mol% of CuO content suggests switch over of predominance of conduction mechanism from ionic to electronic [48]. The mobile electrons, or polarons, involved in the process of transfer from Cu 2+ $ Cu 3+ , are attracted by the oppositely charged cations.…”