The role of V2O5 in the modification of structural, optical and electrical properties of vanadium barium borate glasses

Sindhu, Suchita; Sanghi, Sujata; Agarwal, Ashish; Sonam, -; Seth, V. P.; Kishore, N.

doi:10.1016/j.physb.2005.04.037

Cited by 96 publications

(31 citation statements)

References 21 publications

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“…The change in molar volume depends on the rate of changes in both density and molecular weight. [46] Furthermore, upon the results presented in Sec. 3.4, T g data show that the glass transition temperature is very sensitive to the Sb content.…”

Section: Optical Band Gapmentioning

confidence: 76%

Effect of antimony on the optical and physical properties of Sb-V2O5-TeO2 glasses

Souri

Mohammadi

Zaliani

2014

Electron. Mater. Lett.

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Ternary glass systems of the form xSb-(60-x) V2O5-40TeO2 (Sx glasses) with 0 ≤ x ≤ 15 (in mol. %) have been prepared by using the normal melt quenching technique. The optical absorption spectra of these glasses have been recorded within wavelength range of 190 -1100 nm. The absorption spectrum fitting method was employed to obtain the energy band gap. In this method, only the measurement of absorbance spectrum of the glass is needed. The position of the absorption edge and therefore the optical band gap values were found to be depend on glass composition. Results show that the optical band gap is in the range 1.57 -2.14 eV. For each sample, the width of the band tail was determined. The densities of present glasses were measured and the molar volumes were calculated. Also, some thermal properties such as glass transition temperature (Tg) and crystallization temperature (TCr) were obtained by using differential scanning calorimetry (DSC) technique, and from which the glass thermal stability S and glass forming tendency Kgl were calculated. Results show that these glasses (specially for x ≥ 10 mol. %) have good stability and therefore good resistance against thermal shocks for technological applications in fiber devices. Also, Tg values indicate the rigidity and packing of the samples increase with increasing the Sb concentration as a network modifier.

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Section: Optical Band Gapmentioning

confidence: 76%

Effect of antimony on the optical and physical properties of Sb-V2O5-TeO2 glasses

Souri

Mohammadi

Zaliani

2014

Electron. Mater. Lett.

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“…The molar volume of the samples was calculated using the relation, V M = M T /D where M T is the total molecular weight and D is the density. The theoretical optical basicity of ( th ) has been also determined [17] using the reported values of oxides constituents in the literature.…”

Section: Methodsmentioning

confidence: 99%

Impedance spectroscopy and dielectric relaxation in alkali tungsten borate glasses

Sheoran

Sanghi

Rani

et al. 2009

Journal of Alloys and Compounds

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“…This behavior can be related with increase of R (average distance between vanadium ions in the glass) with decrease of vanadium oxide concentration [1,17] and with disruption of the glass network by Li 2 O. Increase of activation energy with decrease of V 2 O 5 content has been observed in vanadium phosphate glasses containing Na 2 O [15] and in vanadium phosphate glasses containing CaO [17] and in vanadium barium borate glasses [18] for a wide range of V 2 O 5 content. In all of these cases, activation energy is not a linear function of V 2 O 5 mol%.…”

Section: Resultsmentioning

confidence: 85%

Activation energy and conductivity of glasses in the P2O5–V2O5–Li2O system

Behzad

Hekmatshoar

Mirzayi

et al. 2009

Ionics

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The conductivity of glasses in the 50P 2 O 5 À xV 2 O 5 À 50 À x ð ÞLi 2 O system was studied as a function of temperature and composition. For all compositions, the conductivity variation as a function of temperature followed an Arrhenius type relationship. Isothermal variation of conductivity as a function of composition showed a minimum for a molar ratio x near 20. Probable mechanisms for decrease of conductivity with decrease of vanadium oxide concentration were explained. The minimum in room temperature was attributed to increase of V 4+ /V 5+ with decrease of vanadium oxide in specific concentrations of vanadium oxide. Activation energy increased with decrease of V 2 O 5 content. This behavior was attributed to increase of average spacing between vanadium ions.

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The role of V2O5 in the modification of structural, optical and electrical properties of vanadium barium borate glasses

Cited by 96 publications

References 21 publications

Effect of antimony on the optical and physical properties of Sb-V2O5-TeO2 glasses

Effect of antimony on the optical and physical properties of Sb-V2O5-TeO2 glasses

Impedance spectroscopy and dielectric relaxation in alkali tungsten borate glasses

Activation energy and conductivity of glasses in the P2O5–V2O5–Li2O system

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