Ultrasonic studies of (TeO2)1-x-(V2O5)x glasses

Effect of high electric field on the dc conduction of TeO2-V2O5-MoO3 amorphous bulk material

“…Current-voltage curves first follow the Ohm's law but at high electric fields conduction is nonohmic, see High-field effect in oxide glasses is known to be caused by reduction of potential barrier (Pool-Frenkel effect), and probably is due to small-polaron hopping conduction [7]. The potential barrier for small-polaron hopping may be reduced by high field as schematically shown in Fig.…”

“…Several transition metal-oxide glasses such as V205-P205, TeO2-V205 [4], V205-B203 and Fe203-P205 [6] exhibit electronic conduction by polaron hopping from lower cationic valence state to higher valence state [7,8].…”

The local structure of gadolinium vanadate–tellurate glasses and glass ceramics: Te2V2O9 crystalline phase

“…Demonstrating a wide range of unique properties, tellurate glasses have potential applications such as pressure sensors, data storage, optical displays, optical amplifiers or as new laser hosts, optical modulators, and optical memory storage systems [1]. Previous studies showed that vanadium tellurate glasses are semiconducting and that they switch when a high electrical field is applied [1,2].…”

“…It is very difficult to form pure vitreous TeO 2 and it has been suggested [3] that this is due to the lone pair of electrons in one of the equatorial positions of the [TeO 4 ] polyhedron. The repulsive forces in this zone hinder the free movement of the polyhedra in space during the cooling of the melt.…”

Effects of Fe2O3 replacement of ZnO on elastic and structural properties of 80TeO2–(20−x)ZnO–xFe2O3 tellurite glass system

“…The glasses have shown high refractive index [1,2], good infrared transmission [3,4], high dielectric constant [5,6] as well as good mechanical strength and chemical durability [7,8]. In addition, tellurite glass is non-hygroscopic compared to phosphate and borate glasses [9,10]. As a conditional glass former, tellurium oxide needs a modifier such as alkali metal, alkaline earth metal oxide and transition metal oxide (TMO) or other glass modifiers [11,12] in order to form glass.…”