Dielectric dispersion and spectroscopic investigations on Na2SO4–B2O3–P2O5 glasses mixed with low concentrations of TiO2

Кумар, Ашок; Rao, Ch. Srinivasa; Srikumar, T.; Gandhi, Y.; Kumar, V. Ravi; Veeraiah, N.

doi:10.1016/j.jallcom.2011.11.126

Cited by 16 publications

(3 citation statements)

References 57 publications

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“…Incorporation of modifier oxide (MgO) to phosphate effect the phosphate link to formed P-O-K (K= metal ion), hence de-polymerized the structure. The quantitative measurements of Q n distribution are in consistent with the Van Wazar predictions for the structure of phosphate [47]. Van Wazar formalized the transformation of P2O5 structures with increase or decrease in compositions.…”

Section: Band Gap Energy (∆E) and Urbach's Analysissupporting

confidence: 79%

“…(dithiophophate) species [10,47].The small fraction of phosphate tetrahedra (PO4) may associate with ring structures which limit the chain length [33], but the development of phosphate rings does not affect the Q n distribution. It is worth considering that, the atomic arrangements in the short and intermediate range of networks are the most significant factor that determines the emission feature of the materials.…”

Section: Spomentioning

confidence: 99%

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Structure and Physical Properties of 30MgSO4-(70-x) P2O5-xSm2O3 glasses

Aliyu

Ahmed

2019

EJSMT

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Glasses in the series 30MgSO4-(70-x) P2O5-xSm2O3 0.2 ≤ x ≤1.0 mol percent were prepared by single step melt-quench techniques, the structure, physical and optical properties of samarium oxide at different concentrations were studied. The amorphous phase of the samples was verified by X-ray diffraction spectroscopy, the structural units were investigated using Fourier Transform Infrared, Raman and NMR spectroscopy where the spectra reveal the presence of symmetric, asymmetric, torsoional and bending vibration of phosphate groups, the NMR spectra reveals the changes in Q n distribution here discussed, the compositional dependence on physical (density, average molar weight, dielectric constant, Inter-nuclear distance, Field strength, Molar volume, Molar refractivity etc) and optical parameters were determined. In terms of structural modifications, there is variation of density and molar volume, the glass sample has increasing refractive index values with decreasing molar volume content. The luminescence spectra were observed within UV-Vis-NIR region, the absorption spectra of the sample were recorded in the range of 350 to 1800 nm meanwhile, absorption edge the optical band-gap, and ∆E was evaluated. Our result may be advantageous for many optical applications (e.g visible lasers or color displays).

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Section: Band Gap Energy (∆E) and Urbach's Analysissupporting

confidence: 79%

Section: Spomentioning

confidence: 99%

Structure and Physical Properties of 30MgSO4-(70-x) P2O5-xSm2O3 glasses

Aliyu

Ahmed

2019

EJSMT

View full text Add to dashboard Cite

show abstract

“…vibrations), 780 cm -1 (due to SiOSi symmetric stretching /TiO 4 units), 700 cm -1 (due to BOB linkages) and at 620 cm -1 ( due to SiO -stretching with two NBOs/TiO 6 units)[30][31][32][33][34][35]. With the increase of TiO 2 content up to 6.0 mol%, the intensity of the vibrational bands due to BO3 units, TiO 6 units and SiOSi symmetric vibrations is observed to increase.…”

mentioning

confidence: 99%