In-situ Raman and Brillouin light scattering study of the international simple glass in response to temperature and pressure

Guerette, Michael; Huang, Liping

doi:10.1016/j.jnoncrysol.2014.12.028

Cited by 31 publications

(48 citation statements)

References 39 publications

(55 reference statements)

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“…This observation is in agreement with in situ Raman data obtained on ISG glass with the increase of temperature. 22 An opposite trend was noted for sodium borosilicate glasses (without Zr and Al), whose degree of polymerization, as expected, was found to be lower the higher the fictive temperature was. 7,8 However, it is worth noting that the Si-O stretching region of the Q n species is strongly affected by the presence of the T secondneighbors of Si (T = Zr, Al, B).…”

Section: Discussionmentioning

confidence: 71%

“…This value is in good agreement with previous works on ISG glass reporting 575°C. 22 The difference in molar heat capacity near T g , ΔC P (T g ), between the annealed and as-received fibers was . The error bars were taken as the standard deviation for the Gaussian fitting of the related peaks Fig.…”

Section: Thermal History and Thermodynamic Properties Of Glass Samplesmentioning

confidence: 99%

“…This is consistent with the fact that the density and elastic properties of the glass decrease with the increase in quenching rate. 21,22 Between 150 and 450°C, the Brillouin curves for the samples are all parallel, with a shallow slope. This evolution corresponds to thermal expansion, which is weakly sensitive to the initial cooling rate.…”

Section: Thermal History and Thermodynamic Properties Of Glass Samplesmentioning

confidence: 99%

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Effect of thermally induced structural disorder on the chemical durability of International Simple Glass

et al. 2018

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While the influence of silicate oxide glass composition on its chemical durability is increasingly known, the contribution of structure only is less well understood, yet is crucial for an accurate description of aqueous alteration mechanisms. The effect of structural disorder can be investigated by varying the thermal history of the glass. Furthermore, the structural changes generated by selfirradiation in nuclear glasses can be compared with those induced by fast quenching. In the context of deep geological disposal of vitreous matrices, it is then challenging to address the structural impact on glass durability. Here, a borosilicate glass, the International Simple Glass, was fiberized to obtain a rapidly quenched sample. The quenching rate and fictive temperature were evaluated from in situ Raman and Brillouin spectroscopies. Multinuclear nuclear magnetic resonance was used to obtain insight into the effect of quenching on the pristine and altered glass structure. Higher bond angle distribution and lower mixing of alkalis were observed in the fast quenched glass. Some of AlO 4 groups are then Ca-compensated, while a part of BO 4 is transformed into BO 3 units. The structural modifications increase the hydrolysis of the silicate network occurring in the forward rate regime at 90°C by a factor of 1.4-1.8 depending on the pH value. Residual rate regime is similarly affected, more significantly at the beginning of the experiments conducted in silica saturated solutions. These findings prove that the reactivity of glass remains controlled by its structure under the various alteration regimes.

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Section: Discussionmentioning

confidence: 71%

Section: Thermal History and Thermodynamic Properties Of Glass Samplesmentioning

confidence: 99%

Section: Thermal History and Thermodynamic Properties Of Glass Samplesmentioning

confidence: 99%

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Effect of thermally induced structural disorder on the chemical durability of International Simple Glass

et al. 2018

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“…1 International Simple Glass (ISG) is a simplified model composition for a collaborative study of dissolution/corrosion mechanism of highlevel waste (HLW) glasses. [2][3][4] ISG has been intensively researched recently with studies focusing on its dissolution behavior under different conditions, 3,[5][6][7][8][9][10][11][12] its surface quality, 13 radiation effect, [14][15][16][17][18] waste loading, 19 mechanical property, 20,21 and especially on the properties of its alteration layers using diverse techniques such as electron microprobe analysis, 22 Doppler broadening positron annihilation spectroscopy, 23 and atom probe tomography. 24 However, due to the lack of long-range periodicity, the structural study of glass materials exhibits many challenges.…”

Section: Introductionmentioning

confidence: 99%

Structural role of ZrO2 and its impact on properties of boroaluminosilicate nuclear waste glasses

Deng

Kerisit

et al. 2018

npj Mater Degrad

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Addition of zirconia (ZrO 2 ) to nuclear waste glasses, even in small amount, significantly affects physical properties such as chemical durability, density, viscosity, and glass transition temperature. Hence ZrO 2 plays an important role in the development of nuclear waste glass compositions. It was found recently that addition of zirconia decreases the initial dissolution rate but increases longterm dissolution by changing the protective properties such as porosity of alteration layers. In this study, the International Simple Glass (ISG) with different amounts of ZrO 2 /SiO 2 substitution was simulated using classical molecular dynamics (MD) simulations and recently developed composition-dependent potential sets. Local structural descriptors such as bond distances, bond angle distributions, and coordination numbers were systematically studied and compared with experimental values. Zr K-edge extended X-ray absorption fine structure spectra were also calculated and compared with experiment to resolve the local coordination environment around Zr. Medium-range structural information (e.g., Q n distribution, network connectivity, and ring-size distribution) showed that ZrO 2 /SiO 2 substitution increases the overall network connectivity and the amount of smaller sized rings, which will decrease the initial dissolution rate by strengthening the glass network and limiting water diffusivity. Finally, diffusion and dynamic properties of the ions were studied and discussed to develop a better understanding of the chemical durability of these glasses.

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“…In addition, we also found that a less brittle glass (LBG) developed by Sehgal et al that shows a high cracking resistance is also an intermediate glass. International simple glass (ISG), a six‐component boroaluminosilicate glass that is widely studied as a model system for nuclear waste form was found to exhibit intermediate behavior as well in terms of its elastic response to temperature . Aside from the silicate glass system, some borate glasses also show intermediate behaviors .…”

Section: Introductionmentioning

confidence: 99%

Understanding the structural origin of intermediate glasses

2018

Self Cite

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Intermediate glasses show nearly constant elastic moduli with temperature and/or pressure. These glasses would prove useful in designing a‐thermal optical fibers for enhanced telecommunication, fiber sensing applications, and in designing glass products for applications where a broad range of thermal and mechanical stimulation is expected. In this study, intermediate glasses belonging to the Na2O–SiO2, Na2O–Al2O3–SiO2, and Na2O–TiO2–SiO2 glass systems were identified from in situ high‐temperature Brillouin light scattering (BLS) experiments. Glasses important for engineering applications like the international simple glass (ISG) and the less brittle glass (LBG) were also found to exhibit intermediate behaviors. In situ Raman spectroscopy was used to investigate their structural evolution from room temperature to temperatures beyond Tg. Raman spectra along with molecular dynamics simulations revealed common structural signatures that intermediate glasses with different compositions possess. Our study showed that the intermediate elastic behaviors come from a delicate balance between the stiffening effect associated with conformation changes in the medium‐range flexible rings and the softening effect due to the weakening of short‐range chemical bonds with temperature.

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In-situ Raman and Brillouin light scattering study of the international simple glass in response to temperature and pressure

Cited by 31 publications

References 39 publications

Effect of thermally induced structural disorder on the chemical durability of International Simple Glass

Effect of thermally induced structural disorder on the chemical durability of International Simple Glass

Structural role of ZrO2 and its impact on properties of boroaluminosilicate nuclear waste glasses

Understanding the structural origin of intermediate glasses

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