Structure of bismuth tellurite and bismuth niobium tellurite glasses and Bi2Te4O11 anti-glass by high energy X-ray diffraction

Gupta, Nupur; Khanna, Atul; Hirdesh,; Dippel, Ann‐Christin; Gutowski, Olof

doi:10.1039/d0ra01422b

Cited by 19 publications

(9 citation statements)

References 53 publications

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“…The last units are the deformed double triangular pyramid. When a cation modifier is added into the TeO 2 glass, it breaks bridging Te–O–Te linkages, and the transformations of the [TeO 4 ] → [TeO 3 ] and [TeO 4 ] → [TeO 3+1 ] have been placed [ 53 , 54 ]. The structural units of the network of pure germanate glasses can be formed with tetrahedra [GeO 4 ], trigonal bipyramid/square pyramid [GeO 5 ], and octahedra [GeO 6 ] [ 48 ].…”

Section: Resultsmentioning

confidence: 99%

Investigation of the TeO2/GeO2 Ratio on the Spectroscopic Properties of Eu3+-Doped Oxide Glasses for Optical Fiber Application

et al. 2021

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This study presented an analysis of the TeO2/GeO2 molar ratio in an oxide glass system. A family of melt-quenched glasses with the range of 0–35 mol% of GeO2 has been characterized by using DSC, Raman, MIR, refractive index, PLE, PL spectra, and time-resolved spectral measurements. The increase in the content of germanium oxide caused an increase in the transition temperature but a decrease in the refractive index. The photoluminescence spectra of europium ions were examined under the excitation of 465 nm, corresponding to 7F0 → 5D2 transition. The PSB (phonon sidebands) analysis was carried out to determine the phonon energy of the glass hosts. It was reported that the red (5D0 → 7F2) to orange (5D0 → 7F1) fluorescence intensity ratio for Eu3+ ions decreased from 4.49 (Te0Ge) to 3.33 (Te15Ge) and showed a constant increase from 4.58 (Te20Ge) to 4.88 (Te35Ge). These optical features were explained in structural studies, especially changes in the coordination of [4]Ge to [6]Ge. The most extended lifetime was reported for the Eu3+ doped glass with the highest content of GeO2. This glass was successfully used for the drawing of optical fiber.

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Section: Resultsmentioning

confidence: 99%

Investigation of the TeO2/GeO2 Ratio on the Spectroscopic Properties of Eu3+-Doped Oxide Glasses for Optical Fiber Application

et al. 2021

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“…ere is no very sharp diffraction peak, which is a very typical diffraction pattern of an amorphous substance. ese show that when the mole percentage of BaF 2 is between 1% and 7% (corresponding to the mole percentage of ZnO between 19% and 13%), the product obtained after the smelting of the TPZBF glass system is a stable glass structure without precipitation of crystalline phases [17].…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Study on the Optical Properties of High Refractive Index TeO₂‐PbO‐ZnO‐BaF₂ Glass System

Yin

Wang

et al. 2021

Advances in Materials Science and Engineering

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The tellurite 60TeO2-20PbO-(20-x)ZnO-xBaF2 (x = 1, 3, 5, 6, 7, 9, and 11) series glass samples were prepared. The samples’ SEM, XRD, DSC, density, refractive index, and absorption spectra were tested. A self-made optical platform was used to measure and calibrate the refractive index. The relationship between glass composition and crystallinity was discussed. The effects of density, molar refractive index, and metal standard value on the refractive index of glass samples were studied. The results showed that TPZBF glass has a high refractive index, and the refractive index increases with the increase in BaF2 content.

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“…The RMC technique simultaneously fitted the X-ray diffraction and neutron diffraction datasets by minimizing the squared difference between the experimental S(Q) and the calculated ones from a three-dimensional atomic configuration. The total structure factor S(Q) is a weighted sum of partial structure factor and is given by (Egami & Billinge, 2003;Kaur et al, 2020;Gupta et al, 2020;Fischer et al, 2006):…”

Section: Fourier Transformation and Reverse Monte Carlo Simulationsmentioning

confidence: 99%

Structure of lithium tellurite and vanadium lithium tellurite glasses by high-energy X-ray and neutron diffraction

Hirdesh

Khanna

Fábián

et al. 2021

Acta Crystallogr B Struct Sci Cryst Eng Mater

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xLi2O–(100 − x)TeO2 (x = 20 and 25 mol%) and xV2O5–(25 − x)Li2O–75TeO2 (x = 1, 2, 3, 4 and 5 mol%) glasses were prepared by melt-quenching and their thermal and structural properties were characterized by differential scanning calorimetry, Raman spectroscopy, high-energy X-ray diffraction and neutron diffraction and reverse Monte Carlo (RMC) simulations. The glass transition temperature increases steadily with an increase in V2O5 mol% in lithium tellurite glasses due to an increase in the average single bond energy of the glass network. The X-ray and neutron diffraction structure factors were modelled by RMC technique and the Te–O distributions show the first peak in the range 1.85–1.90 Å, with V–O = 1.75–1.95 Å, Li–O = 1.85–2.15 Å and O–O = 2.70–2.80 Å. The average Te–O coordination number decreases with an increase in Li2O mol% in lithium tellurite glasses, and the V—O coordination decreases from 5.12 to 3.81 with an increase in V2O5 concentration in vanadium lithium tellurite glasses. The O–Te–O, O–V–O, O–Li–O and O–O–O linkages have maxima in the ranges 86°–89°, 82°–87°, 80°–85° and at 59o, respectively. The structural analysis of tellurite glasses reveal significant short-range and medium-range disorder due to the existence of a wide range of Te–O and Te–Te distances in the first coordination shell.

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Structure of bismuth tellurite and bismuth niobium tellurite glasses and Bi₂Te₄O₁₁ anti-glass by high energy X-ray diffraction

Abstract: Te–O, Bi–O and Nb–O bond lengths, co-ordinations in bismuth tellurite, bismuth niobium tellurite glasses and Bi2Te4O11 anti-glass by HEXRD, RMC and Riteveld analysis.

Cited by 19 publications

References 53 publications

Investigation of the TeO2/GeO2 Ratio on the Spectroscopic Properties of Eu3+-Doped Oxide Glasses for Optical Fiber Application

Investigation of the TeO2/GeO2 Ratio on the Spectroscopic Properties of Eu3+-Doped Oxide Glasses for Optical Fiber Application

Study on the Optical Properties of High Refractive Index TeO₂‐PbO‐ZnO‐BaF₂ Glass System

Structure of lithium tellurite and vanadium lithium tellurite glasses by high-energy X-ray and neutron diffraction

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Structure of bismuth tellurite and bismuth niobium tellurite glasses and Bi2Te4O11 anti-glass by high energy X-ray diffraction

Abstract: Te–O, Bi–O and Nb–O bond lengths, co-ordinations in bismuth tellurite, bismuth niobium tellurite glasses and Bi2Te4O11 anti-glass by HEXRD, RMC and Riteveld analysis.

Cited by 19 publications

References 53 publications

Investigation of the TeO2/GeO2 Ratio on the Spectroscopic Properties of Eu3+-Doped Oxide Glasses for Optical Fiber Application

Investigation of the TeO2/GeO2 Ratio on the Spectroscopic Properties of Eu3+-Doped Oxide Glasses for Optical Fiber Application

Study on the Optical Properties of High Refractive Index TeO2‐PbO‐ZnO‐BaF2 Glass System

Structure of lithium tellurite and vanadium lithium tellurite glasses by high-energy X-ray and neutron diffraction

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Structure of bismuth tellurite and bismuth niobium tellurite glasses and Bi₂Te₄O₁₁ anti-glass by high energy X-ray diffraction

Study on the Optical Properties of High Refractive Index TeO₂‐PbO‐ZnO‐BaF₂ Glass System