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- W2760519318 abstract "Borophosphate glasses of composition, (B 2 O 3 ) 0.2 (P 2 O 5 ) 0.8-x (V 2 O 5 ) x with x = 0.35, 0.40, 0.45, 0.50, 0.55 and 0.60 were synthesized. Room temperature density and the conductivity for the temperature range from 300 K to 650 K were measured. Density decreased up to 0.45 mole fractions of V 2 O 5 , increased for 0.5 mole fractions and decreased thereafter. By employing Mott’s SPH (Small Polaron Hopping) model, activation energy for conduction has been determined. Activation energy decreased with increasing V 2 O 5 content up to 0.55 mole fractions and increased for further amounts of V 2 O 5 . Conductivity behaved in the opposite fashion to that of activation energy with V 2 O 5 concentration. Increase in conductivity for V 2 O 5 up to 0.55 mole fractions and decrease for higher concentrations may be attributed to mixed glass former (MGFE) effect occurring around 0.55 mole fractions of V 2 O 5 . Conductivity data that was not in agreement with Mott’s SPH model has been considered in the light of variable range hopping models of Mott and Greaves. Density of states at Fermi level from both the model fits have been determined and compared. Various polaron hopping related parameters were estimated. For the first time MGFE has been observed in V 2 O 5 doped borophosphate glasses of present compositions." @default.
- W2760519318 created "2017-10-06" @default.
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- W2760519318 date "2015-08-23" @default.
- W2760519318 modified "2023-09-24" @default.
- W2760519318 title "Electrical Conduction in V 2 O 5 Doped Borophosphate Glasses" @default.
- W2760519318 hasPublicationYear "2015" @default.
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