Detailed study about the thermal behavior and kinetics characterization of an oxyfluoride tellurite glass

Elkhoshkhany, N.; Syala, Eslam

doi:10.1016/j.jnoncrysol.2018.02.008

Cited by 13 publications

(4 citation statements)

References 47 publications

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“…As can be seen in Table 1, oxyfluoride phospho-tellurite TP0.25ErF 3 , TP0.75ErF 3 , TP1.00ErF 3 , and TP1.25ErF 3 glasses have a thermal stability > 100 °C (ΔT = 109–142 ± 1 °C), except TP0.50ErF 3 glass, which has a smaller value < 100 °C (ΔT = 95 ± 1 °C). Therefore, TP0.25ErF 3 , TP0.75ErF 3 , TP1.00ErF 3 , TP1.25ErF 3 glasses should be suitable for optical fiber drawing [52,53,54]. In comparison with other oxyfluoride tellurite glasses, the value of ΔT (case of 1 mol% of ErF 3 ) is larger than that of TeO 2 -ZnF 2 -ZnO-Er 2 O 3 glasses (ΔT = 98–126 °C) [55], TeO 2 -ZnO-La 2 O 3 -Tm 2 O 3 -Yb 2 O 3 (ΔT = 126–135 °C) [56], TeO 2 -GeO 2 -InO 2/3 -ZnO-KF (ΔT = 129 °C) [57], and TeO 2 -ZnO-7ZnF 2 (ΔT = 120 °C) [51].…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals

et al. 2019

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The ErF3-doped oxyfluoride phospho-tellurite glasses in the (40-x) TeO2-10P2O5-45 (BaF2-ZnF2) -5Na2O-xErF3 system (where x = 0.25, 0.50, 0.75, 1.00, and 1.25 mol%) have been prepared by the conventional melt-quenching method. The effect of erbium trifluoride addition on thermal, structure, and spectroscopic properties of oxyfluoride phospho-tellurite precursor glass was studied by differential scanning calorimetry (DSC), Fourier-transform infrared (FTIR), and Raman spectroscopy as well as emission measurements, respectively. The DSC curves were used to investigate characteristic temperatures and thermal stability of the precursor glass doped with varying content of ErF3. FTIR and Raman spectra were introduced to characterize the evolution of structure and phonon energy of the glasses. It was found that the addition of ErF3 up to 1.25 mol% into the chemical composition of phospho-tellurite precursor glass enhanced 2.7 µm emission and upconversion. By controlled heat-treatment process of the host glass doped with the highest content of erbium trifluoride (1.25 mol%), transparent erbium-doped phospho-tellurite glass-ceramic (GC) was obtained. X-ray diffraction analysis confirmed the presence of BaF2 nanocrystals with the average 16 nm diameter in a glass matrix. Moreover, MIR, NIR, and UC emissions of the glass-ceramic were discussed in detail and compared to the spectroscopic properties of the glass doped with 1.25 mol% of ErF3 (the base glass).

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Section: Resultsmentioning

confidence: 99%

Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals

et al. 2019

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“…Another critical drawback of tellurite glasses for transparent glass-ceramics production is related to their dominant surface-induced crystallization. Most reported works on this subject are devoted to high alkaline [ 38 , 39 ] and zinc fluoride [ 40 , 41 , 42 , 43 , 44 , 45 ] contents in transparent tellurite glasses without a loss of the glass forming ability. Only a few works reported on transparent tellurite glasses with high heavy metal fluoride contents such as BaF 2 and PbF 2 up to 30 mol% [ 46 , 47 , 48 , 49 , 50 ].…”

Section: Introductionmentioning

confidence: 99%

Transparent Glasses and Glass-Ceramics in the Ternary System TeO2-Nb2O5-PbF2

et al. 2021

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Transparent fluorotellurite glasses were prepared by melt-quenching in the ternary system TeO2-Nb2O5-PbF2. The synthesis conditions were adjusted to minimize fluorine loss monitored as HF release. It was found that 10 mol% of Nb2O5 is the optimum content for PbF2 incorporation up to 35 mol% in the tellurite matrix without loss of glass forming ability. Such glass compositions exhibit a wide optical window from 380 nm to about 6 μm. Crystallization properties were carefully investigated by thermal analysis and compositions with higher PbF2 contents exhibit preferential precipitation of lead oxyfluoride Pb2OF2 at lower temperatures. The lead oxyfluoride crystallization mechanism is also governed by a volume nucleation, barely reported in tellurite glasses. Eu3+ doping of these glass compositions also promotes a more efficient nucleation step under suitable heat-treatments, resulting in transparent Eu3+-doped glass-ceramics whereas undoped glass-ceramics are translucent. Finally, Eu3+ spectroscopy pointed out a progressive, more symmetric surrounding around the rare earth ions with increasing PbF2 contents as well as higher quantum efficiencies. These new fluorotellurite glass compositions are promising as luminescent hosts working in the middle infrared.

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“…Generally, T g decreases with the replacement of sulfate to fluoride while T x shows an opposite trend which means the addition of sulfate could improve the Δ T and thermal stability. The gradually clear exothermic rise after glass transition temperature could be attributed to the softening temperature 23 . In addition, Hruby proposed glass‐forming factor to describe the thermal stability of glasses: 24

K_{gl} = ()(, T_{x} - T_{g}) true/ ()(, T_{m} - T_{g})

where T m is the melting temperature and summarized in Table 3.…”

Section: Resultsmentioning

confidence: 99%

“…The gradually clear exothermic rise after glass transition temperature could be attributed to the softening temperature. 23 In addition, Hruby proposed glass-forming factor to describe the thermal stability of glasses: 24 where T m is the melting temperature and summarized in Table 3.…”

Section: S/f Compositionmentioning

confidence: 99%

Optical properties of Er³⁺ and Yb³⁺/Er³⁺‐doped NaF‐Na₂SO₄‐Al(PO₃)₃ fluoro‐sulfo‐phosphate glasses

Xiao

Huang

et al. 2020

J Am Ceram Soc

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Fluoro‐sulfo‐phosphate (FPS) glass is of current interest as potential material for laser application due to its good glass‐forming ability, thermal, and chemical stability as well as the complicated local environment for incorporated species. Herein, the physical and luminescent properties of Er3+ and Yb3+/Er3+‐doped FPS glasses vs S/F ratio are investigated comprehensively. The low melting temperature (750°C) leads to fewer ingredients evaporation and easier operation. The sulfate addition depolymerizes the structure of FPS glasses, leading to either monotonic or nonmonotonic variations of physical properties, while no deterioration in thermal and limited one in chemical stability is caused. The addition of sulfate also modifies the local structure around optical active species and thus, leading to higher emission cross section (1.52 × 10−20 cm2), effective linewidth (68.4 nm), figure of merit (5.61 × 10−23 s cm2), gain bandwidth (102.44 × 10−27 cm3), and energy‐transfer microparameters (51.87 × 10−39 cm6/s), implying high possibility to serve as 1.5 μm laser application.

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Detailed study about the thermal behavior and kinetics characterization of an oxyfluoride tellurite glass

Cited by 13 publications

References 47 publications

Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals

Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals

Transparent Glasses and Glass-Ceramics in the Ternary System TeO2-Nb2O5-PbF2

Optical properties of Er³⁺ and Yb³⁺/Er³⁺‐doped NaF‐Na₂SO₄‐Al(PO₃)₃ fluoro‐sulfo‐phosphate glasses

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Detailed study about the thermal behavior and kinetics characterization of an oxyfluoride tellurite glass

Cited by 13 publications

References 47 publications

Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals

Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals

Transparent Glasses and Glass-Ceramics in the Ternary System TeO2-Nb2O5-PbF2

Optical properties of Er3+ and Yb3+/Er3+‐doped NaF‐Na2SO4‐Al(PO3)3 fluoro‐sulfo‐phosphate glasses

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Optical properties of Er³⁺ and Yb³⁺/Er³⁺‐doped NaF‐Na₂SO₄‐Al(PO₃)₃ fluoro‐sulfo‐phosphate glasses