Majority charge carrier reversal and its effect on thermal and electron transport in xV2O5–(1−x) As2O3 glasses

Thermal Kinetics and Theoretical Third Order Nonlinear Optical Susceptibility of some As2 O3 .V2 O5 .FeO Glasses

“…It can be concluded from Figure that T g , T c , and T P increase from 615 to 666 K with increasing the amount of the As 2 O 3 in the glasses. Some close characteristic temperatures are reported for (60− x )V 2 O 5 · x As 2 O 3 ·20Fe 2 O 3 ·10CaO·10Li 2 O glasses and for x V 2 O 5 ·(1− x )As 2 O 3 glasses, whereas large values are obtained for 35P 2 O 5 ·(45− x )V 2 O 5 · x As 2 O 3 ·20Fe 2 O 3 glasses…”

“…The values of T g , T c , and T P are shown in Figure 9 as a function of %As 2 O 3 in the glasses. It can be concluded from Figure 9 that T g , T c , and T P increase from 615 to 666 K with increasing the amount of the [58] and for xV 2 O 5 Á(1Àx)As 2 O 3 glasses, [59] whereas large values are obtained for 35P 2 O 5 Á(45Àx)V 2 O 5 ÁxAs 2 O 3 Á20Fe 2 O 3 glasses. [9] The calculated thermal stability is found to increase from 11 to 45 K with the increase of the %As 2 O 3 in the glasses.…”

Operando Electrical Conductivity and Complex Permittivity Study on Vanadia Oxidation Catalysts

“…V 2 O 5 is an active oxidation catalyst but with low selectivity to partial oxidation products of hydrocarbons. It has been studied extensively as model system with regard to its surface termination and defects by surface science techniques and theory. − Electrical transport measurements of vanadium pentoxide single crystals identified V 2 O 5 as a n-type semiconductor with low mobility electrons as majority carriers. − Above 77–97 °C a hopping of free polarons was proposed as the conduction mechanism. ,,, Other authors focused on V 2 O 5 glasses and thin films, also applying Mott’s polaron conduction model . Few studies, however, have addressed the semiconducting properties of vanadium pentoxide under alkane oxidation conditions.…”

“…24−29 Above 77−97 °C a hopping of free polarons was proposed as the conduction mechanism. 25,26,29,30 Other authors focused on V 2 O 5 glasses 31 and thin films, 24 also applying Mott's polaron conduction model. 32 Few studies, however, have addressed the semiconducting properties of vanadium pentoxide under alkane oxidation conditions.…”