Effect of pressure on the short-range structure and speciation of carbon in alkali silicate and aluminosilicate glasses and melts at high pressure up to 8 GPa: 13C, 27Al, 17O and 29Si solid-state NMR study

Kim, Eun Jeong; Fei, Yingwei; Lee, Sung Keun

doi:10.1016/j.gca.2018.01.006

Cited by 13 publications

(12 citation statements)

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“…The absence of any peaks at ~160-165 ppm in the spectra for all glasses studied here (Figure 3) also confirms the absence of bridging carbonates such as [4] Si(CO 3 ) [4] Si or the network carbonate units described by Brooker et al 29 and Xue et al 30 . Such units were also observed by Kim et al 31 in their Na 2 O•3SiO 2 melts, but only at pressures of 6 GPa and above. Such network carbonate units are therefore not expected in sodium silicate glasses melted at ambient pressures, and the absence of peaks at ~160-165 in our 13 C MAS-NMR spectra (Figure 3) confirms this.…”

Section: -supporting

confidence: 73%

“…Kim et al 31 recently used 13 C MAS-NMR to study Na 2 O•3SiO 2 glasses prepared under a range of pressures from 4 to 8 GPa, and found that the CO 3 2free carbonate peak near 170 ppm shifted to lower frequency with increasing pressure, with the peak positions from 171.7 ppm at 4 GPa to 170.2 ppm at 8 GPa. Our corresponding Na 2 O-3SiO 2 glass (x = 0.25) contained extremely low (0.003 wt%) carbon and consequently we were unable to obtain an NMR signal.…”

Section: -mentioning

confidence: 99%

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MAS-NMR studies of carbonate retention in a very wide range of Na2O-SiO2 glasses

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Packard

Vaishnav

et al. 2020

Journal of Non-Crystalline Solids

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Section: -supporting

confidence: 73%

Section: -mentioning

confidence: 99%

MAS-NMR studies of carbonate retention in a very wide range of Na2O-SiO2 glasses

Barrow

Packard

Vaishnav

et al. 2020

Journal of Non-Crystalline Solids

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“…28 Particularly, earlier NMR studies based on high-resolution techniques under fast magic angle spinning (MAS) (e.g., 29 Si and 27 Al) have unraveled the pressure-induced changes in coordination environments and connectivity in silicate glasses under compression (e.g., Refs. [33][34][35][36][37][38][39][40][41], see Ref. [42] for review), showing the formation of [5,6] Si and [5,6] Al at elevated pressure conditions (e.g., Refs.…”

Section: Introductionmentioning

confidence: 99%

Structure and disorder in MgSiO₃ glasses above megabar pressures via nuclear magnetic resonance: DFT calculations

Lee

Parq

et al. 2022

J Am Ceram Soc.

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The structural modifications in oxide glasses under extreme compression may account for the pressure‐induced increase in their mechanical toughness and rigidity, rendering potential for technological applications of the compressed glasses. High‐resolution solid‐state nuclear magnetic resonance has provided a structural information regarding glasses by identifying how nuclear spins behave and interact with nearby elements. However, knowledge of nuclear spins resonance in oxide glasses under extreme pressure above 1 million atmospheres has not been available, making the origins of glass densification illusive. In this article, ab initio calculations of prototypical magnesium silicate glasses quantify how structural changes in glasses affect the nature of nuclear spin interactions at high pressure beyond megabars. The calculated results establish novel correlations between pressure‐induced evolution of atomic structures, such as oxygen and cation coordination numbers, bond angle and lengths, and structurally relevant nuclear magnetic resonance parameters for Mg, Si, and O in compressed oxide glasses above megabar pressures. The established correlations highlight that the nuclear spins in glasses can serve as a new indicator to the extreme densification paths. Pressure‐induced dispersion in nuclear spin parameters also reveals an overall increase in the topological entropy. This entropy gain may weaken glasses at an elevated pressure conditions, accounting for potential softening of the compressed glasses. The proposed relationships open a new window to the evolution of diverse complex glasses under extreme stress and compression with high‐resolution solid‐state nuclear magnetic resonance.

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“…In amorphous materials, due to the lack of crystalline constraints, high pressure may induce the formation of new local configurations. Kim et al 17 explored the speciation of carbon and pressure‐induced changes in network structures of carbon‐bearing silicate (Na 2 O‐3SiO 2 , NS3) and sodium aluminosilicate (NaAlSi 3 O 8 , albite) glasses produced by quenching at high pressure (up to 8 GPa). They found out that the addition of CO 2 in the melts did not lead to an additional change in the network structure of the carbon‐bearing albite glass.…”

Section: Introductionmentioning

confidence: 99%

Lithium disilicate glass produced at high pressure: Characterization of structural, thermal and mechanical properties

et al. 2021

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In this work, high‐density lithium disilicate (LS2) vitreous systems were produced by melting and quenching under high pressure (7.7 GPa) following two distinct experimental routes. In the first case, LS2 glass was remelted at 7.7 GPa and 1600°C and, then, quenched. In the second case, a stoichiometric mixture of precursor oxides (Li2O and SiO2) was melted at 1600°C and 7.7 GPa before quenching. A reference LS2 glass sample was produced at atmospheric pressure using conventional melting and quenching procedure. The samples were characterized by X‐ray diffraction, differential thermal analysis, and instrumented ultramicro hardness measurements. X‐ray diffraction confirmed that all samples were amorphous and thermal analysis suggests that different glassy structures were produced depending on the route of synthesis. Hardness and elastic modulus of the glasses produced under high pressure were higher than those of the reference glass, reflecting the irreversible densification effect induced by the high‐pressure processing.

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Effect of pressure on the short-range structure and speciation of carbon in alkali silicate and aluminosilicate glasses and melts at high pressure up to 8 GPa: 13C, 27Al, 17O and 29Si solid-state NMR study

Cited by 13 publications

References 99 publications

MAS-NMR studies of carbonate retention in a very wide range of Na2O-SiO2 glasses

MAS-NMR studies of carbonate retention in a very wide range of Na2O-SiO2 glasses

Structure and disorder in MgSiO₃ glasses above megabar pressures via nuclear magnetic resonance: DFT calculations

Lithium disilicate glass produced at high pressure: Characterization of structural, thermal and mechanical properties

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Effect of pressure on the short-range structure and speciation of carbon in alkali silicate and aluminosilicate glasses and melts at high pressure up to 8 GPa: 13C, 27Al, 17O and 29Si solid-state NMR study

Cited by 13 publications

References 99 publications

MAS-NMR studies of carbonate retention in a very wide range of Na2O-SiO2 glasses

MAS-NMR studies of carbonate retention in a very wide range of Na2O-SiO2 glasses

Structure and disorder in MgSiO3 glasses above megabar pressures via nuclear magnetic resonance: DFT calculations

Lithium disilicate glass produced at high pressure: Characterization of structural, thermal and mechanical properties

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Effect of pressure on the short-range structure and speciation of carbon in alkali silicate and aluminosilicate glasses and melts at high pressure up to 8 GPa: 13C, 27Al, 17O and 29Si solid-state NMR study

Structure and disorder in MgSiO₃ glasses above megabar pressures via nuclear magnetic resonance: DFT calculations