Search Results - "Stebbins, J.F"

Extent of intermixing among framework units in silicate glasses and melts by Lee, S.K., Stebbins, J.F.

“…One aspect of the inherent disorder in silicate glasses and melts is the intermixing among framework units, which has important implications to the macroscopic…”
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Pressure-induced structural changes in a borosilicate glass-forming liquid: boron coordination, non-bridging oxygens, and network ordering by Du, L.-S, Allwardt, J.R, Schmidt, B.C, Stebbins, J.F

“…Two of the most important structural controls on the properties of borosilicate glasses and glass melts are the variation between three- and four-coordination…”
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Structural investigation of hydrous sodium borosilicate glasses by Bauer, U., Behrens, H., Reinsch, S., Morin, E.I., Stebbins, J.F.

“…The structural properties of a borosilicate glass with nominal 16mol% Na2O, 10mol% B2O3 and 74mol% SiO2 and water contents between 0 and 8wt% H2O (0–22mol%…”
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Structure and fragility of normal and invert lanthanum borate glasses: Results from 11B and 17O NMR spectroscopy and calorimetry by Swanson, R.K., Stebbins, J.F., Yeo, T.M., Xu, Y., Hung, I., Gan, Z., McCormack, S.J., Sen, S.

“…•Structure of lanthanum borate glasses are studied using high-field 11B and 17O NMR.•The structure of glasses with ≤ 30% La2O3 consists of a La-modified borate…”
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Dynamics of Na in sodium aluminosilicate glasses and liquids by George, A.M., Stebbins, J.F.

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Temperature dependent structural changes in borate, borosilicate and boroaluminate liquids: high-resolution 11B, 29Si and 27Al NMR studies by Sen, S, Xu, Z, Stebbins, J.F

“…High-resolution 11B, 29Si and 27Al nuclear magnetic resonance spectroscopy is used to quantitatively determine temperature dependent structural changes in…”
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Cation exchange rates and mobility in aluminum-doped lithium orthosilicate: High-resolution lithium-6 NMR results by Stebbins, J.F., Xu, Z., Vollath, D.

“…Magic-angle spinning NMR spectra on 6Li in Li 4SiO 4, Li 4.1Al 0.1Si 0.9O 4, and Li 3.7Al 0.1SiO 4 resolve multiple lithium cation sites, and, with increasing…”
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Structural role of Nd3+ and Al3+ cations in SiO2 glass : a 29Si MAS-NMR spin-lattice relaxation, 27Al NMR and EPR study by SEN, S, STEBBINS, J. F

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Ionic conduction and mixed cation effect in silicate glasses and liquids: 23Na and 7Li NMR spin-lattice relaxation and a multiple-barrier model of percolation by Sen, S., George, A.M., Stebbins, J.F.

“…The mixed cation effect in glasses affects transport properties such as diffusion and ionic conductivity. The temperature dependence of 7Li and 23Na NMR…”
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Silicon site distributions in an alkali silicate glass derived by two-dimensional 29Si nuclear magnetic resonance by Zhang, P., Dunlap, C., Florian, P., Grandinetti, P.J., Farnan, I., Stebbins, J.F.

“…A common approach to quantify Q ( n) species in silicate glasses is to use 29Si magic-angle spinning (MAS) nuclear magnetic resonance (NMR) and assume that the…”
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Oxygen sites in silicate glasses: a new view from oxygen-17 NMR by Stebbins, J.F., Oglesby, J.V., Lee, S.K.

“…Nuclear Magnetic Resonance (NMR) studies of 17O in silicate glasses is beginning to provide new information on structure from an “anionic” viewpoint, which is…”
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Hydroxyl-contents and hydroxyl-related concentration quenching in erbium-doped aluminophosphate, aluminosilicate and fluorosilicate glasses by Houde-Walter, S.N., Peters, P.M., Stebbins, J.F., Zeng, Q.

“…In this paper, we present a study of concentration quenching in Er 3+-doped aluminophosphate, aluminosilicate and fluorosilicate glass hosts. Results of…”
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Oxygen site exchange kinetics observed with solid state NMR in a natural zeolite by Xu, Zhi, Stebbins, J.F.

“…17O solid state nuclear magnetic resonance (NMR) was applied to study the oxygen exchange kinetics between framework oxygens and oxygens in the channel waters…”
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New Opportunities for High-Resolution Solid-State NMR Spectroscopy of Oxide Materials at 21.1- and 18.8-T Fields by Stebbins, J.F, Du, Lin-Shu, Kroeker, S, Neuhoff, P, Rice, D, Frye, J, Jakobsen, H.J

“…We present here high-resolution solid state NMR spectra of several oxide and silicate materials that illustrate the improvements obtainable with very high…”
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Structural role of Nd 3+ and Al 3+ cations in SiO 2 glass: a 29Si MAS-NMR spin-lattice relaxation, 27Al NMR and EPR study by Sen, S, Stebbins, J.F

“…High field strength cations such as rare earth ions are known to show strong clustering when incorporated in minor quantities (hundreds to up to a few…”
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Cross-Polarization from Quadrupolar Nuclei to Silicon Using Low-Radio-Frequency Amplitudes during Magic-Angle Spinning by De Paul, Susan M, Ernst, Matthias, Shore, Jay S, Stebbins, Jonathan F, Pines, Alexander

“…The dynamics of cross-polarization from the central transition of a quadrupolar nucleus (27Al or 23Na) to a spin-1/2 nucleus (29Si) during magic-angle spinning…”
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Hydrogen speciation in hydrogen-loaded, germania-doped silica glass: a combined NMR and FTIR study of the effects of UV irradiation and heat treatment by Zeng, Q., Stebbins, J.F., Heaney, A.D., Erdogan, T.

“…The effects of ultraviolet (UV) irradiation and heat-treatment on hydrogen speciation in H 2 loaded Ge-doped silica glasses have been investigated using…”
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Oxygen sites in the zeolite stilbite: a comparison of static, MAS, VAS, DAS and triple quantum MAS NMR techniques by Xu, Zhi, Stebbins, J.F

“…Static, magic angle spinning (MAS), variable angle spinning (VAS), dynamic angle spinning (DAS) and triple quantum magic angle spinning (3QMAS) NMR techniques…”
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Nuclear magnetic resonance at high temperature by Stebbins, Jonathan F

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Effects of High Temperature on Silicate Liquid Structure: A Multinuclear NMR Study by Stebbins, J. F., Farnan, Ian

“…The structure of a silicate liquid changes with temperature, and this substantially affects its thermodynamic and transport properties. Models used by…”
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