Critical V2O5/TeO2Ratio Inducing Abrupt Property Changes in Vanadium Tellurite Glasses

Kjeldsen, Jonas; Rodrigues, Ana Cândida Martins; Mossin, Susanne; Yue, Yuanzheng

doi:10.1021/jp508910m

Cited by 12 publications

(30 citation statements)

References 52 publications

(125 reference statements)

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“…In general, with this approach, we can accurately determine m values when comparing to viscometric data (see Section 4.3). However, the vanadium tellurite glasses exhibit discrepancies from the viscometric values reported elsewhere …”

Section: Resultscontrasting

confidence: 63%

“…In the following discussion, the largely underestimated (outlier) fragility values (red data points in Figure A‐B) are thus neglected. Furthermore, we neglect the data of all the tellurite glasses from Figure A, due to the large variation in the calorimetric m values, which is unrealistic considering the similar fragility of those glasses reported in literature …”

Section: Resultsmentioning

confidence: 99%

“…Generally, the raw materials were mixed for 60 minutes in a ball mill and then melted in a covered crucible in air at 800‐1650°C for at least 6 hours before being quenched on a metal plate. The detailed preparation procedure for some of the compositions is reported elsewhere …”

Section: Methodsmentioning

confidence: 99%

“…In this work, we compare the Moynihan DSC approach and the relaxation time TM‐DSC approach to determine the fragility index of glass‐forming liquids with a wide range of fragilities ( m from 25 to 97), covering both tellurite, borate, and silicate glass chemistries . Furthermore, we compare the determined m values with those from viscometric methods, reported in literature.…”

Section: Theorymentioning

confidence: 99%

See 3 more Smart Citations

Liquid fragility determination of oxide glass‐formers using temperature‐modulated DSC

Bechgaard

Gulbiten

Mauro

et al. 2019

Int J of Appl Glass Sci

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Glass-forming liquids exhibit a pronounced diversity in the viscosity-temperature relation. This has been characterized by the liquid fragility index to quantify the extent of the non-Arrhenian flow. Precise and accurate determination of liquid fragility is important for understanding a range of phenomena and controlling industrial glass melting processes. In this study, we use temperature-modulated differential scanning calorimetry (TM-DSC) to determine liquid fragility of a wide range of oxide compositions, including tellurites, borates, and silicates. We compare our fragility data to those determined using viscometry and the Moynihan DSC approach. We find that TM-DSC is a useful method for determination of fragility, as it exhibits higher sensitivity and provides an easier and more reliable determination of characteristic temperatures compared to the Moynihan approach. Moreover, TM-DSC is faster and requires smaller sample volume compared to the viscometric approach. However, we also observe that TM-DSC tends to either overestimate or underestimate the fragility of very strong and highly fragile compositions, respectively. K E Y W O R D S liquid fragility, oxide glasses, temperature-modulated DSC How to cite this article: Bechgaard TK, Gulbiten O, Mauro JC, Yue Y, Bauchy M, Smedskjaer MM. Liquid fragility determination of oxide glass-formers using temperature-modulated DSC. Int J Appl Glass Sci.

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Section: Resultscontrasting

confidence: 63%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

See 2 more Smart Citations

Liquid fragility determination of oxide glass‐formers using temperature‐modulated DSC

Bechgaard

Gulbiten

Mauro

et al. 2019

Int J of Appl Glass Sci

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“…All glasses were prepared by the melt-quenching method. 12,13 Both high and low temperature viscosity measurements were conducted on the bulk glass samples. The high temperature viscosities were determined using a concentric cylinder viscometer.…”

Section: Methodsmentioning

confidence: 99%

Determining the liquidus viscosity of glass‐forming liquids through differential scanning calorimetry

Zheng

Solvang

et al. 2020

J Am Ceram Soc

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Viscosity at the liquidus temperature (TL), ηL, is a critical parameter for the design of new glasses, particularly for industrial glass production where crystallization must be suppressed. However, a direct viscometric determination of ηL for a glass‐forming system is difficult due to crystallization. Here we propose an alternative approach for determining ηL through differential scanning calorimetry (DSC). Specifically, DSC is used to measure both the viscosity curve and liquidus temperature of a glass‐forming system and then derive its ηL value. The ηL values determined using DSC are found to be in excellent agreement with those measured through viscometry. The DSC approach is applicable to various glass‐forming systems covering a wide range of fragilities and ηL values spanning over five orders of magnitude. Other advantages of this approach are its accuracy and small sample requirements.

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Investigations on the local structure and the spin Hamiltonian parameters for Cu²⁺ in xCuO−(68−x)V₂O₅−32TeO₂ glasses

Liu

Yang

et al. 2022

Magnetic Reson in Chemistry

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The defect structure, spin Hamiltonian parameters (SHPs: anisotropic g factors g k and g ⊥ and the hyperfine structure constants A k and A ⊥ ), and their compositional dependence of Cu 2þ in xCuO À ð68 À xÞV 2 O 5 À 32TeO 2 (x = 5, 10, 20, 30 mol%) glasses are quantitatively analyzed by using the higher-order perturbation formula of octahedral complex with tetrahedral elongation distortion. Due to the Jahn-Teller effect, the ½CuO 6 10À group is subjected to tetragonal elongation distortion of varying degrees. D q , N, ρ, κ, and H show nonlinear changes with the concentrations of Cu 2þ . When x = 10 mol% CuO, the degree of distortion (ρ ≈ 0:1%) is the smallest; when x = 30 mol% CuO, the degree of distortion (ρ ≈ 15%) is the largest, which indicates that excessive distortion leads to the appearance of Z-axis oxygen vacancies and the coordination number of copper ions from six to four. The increasing tendency of the evaluated N and H reveals decreasing covalency of the whole glass system. Present theoretical studies would be useful to the explore the structural properties and optical applications of glass with different CuO concentrations. K E Y W O R D Selectron paramagnetic resonance, local structure, xCuO À ð68 À xÞV 2 O 5 À 32TeO 2 (x = 5, 10, 20, 30 mol%)

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Critical V₂O₅/TeO₂Ratio Inducing Abrupt Property Changes in Vanadium Tellurite Glasses

Cited by 12 publications

References 52 publications

Liquid fragility determination of oxide glass‐formers using temperature‐modulated DSC

Liquid fragility determination of oxide glass‐formers using temperature‐modulated DSC

Determining the liquidus viscosity of glass‐forming liquids through differential scanning calorimetry

Investigations on the local structure and the spin Hamiltonian parameters for Cu²⁺ in xCuO−(68−x)V₂O₅−32TeO₂ glasses

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Critical V2O5/TeO2Ratio Inducing Abrupt Property Changes in Vanadium Tellurite Glasses

Cited by 12 publications

References 52 publications

Liquid fragility determination of oxide glass‐formers using temperature‐modulated DSC

Liquid fragility determination of oxide glass‐formers using temperature‐modulated DSC

Determining the liquidus viscosity of glass‐forming liquids through differential scanning calorimetry

Investigations on the local structure and the spin Hamiltonian parameters for Cu2+ in xCuO−(68−x)V2O5−32TeO2 glasses

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Product

Resources

About

Critical V₂O₅/TeO₂Ratio Inducing Abrupt Property Changes in Vanadium Tellurite Glasses

Investigations on the local structure and the spin Hamiltonian parameters for Cu²⁺ in xCuO−(68−x)V₂O₅−32TeO₂ glasses