23Na nuclear magnetic resonance spin echo decay spectroscopy of sodium silicate glasses and crystalline model compounds

Gee, Becky; Eckert, Hellmut

doi:10.1016/0926-2040(95)00039-s

Cited by 69 publications

(115 citation statements)

References 34 publications

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“…Similar to previous spin echo studies of 23 Na-containing crystalline compounds [14], there is a noticeable deceleration of the experimental 51 V decay curves compared to the calculated ones at long evolution periods. Fairly good agreement between experimental and calculated data is achieved at short evolution periods (approximately 0 < 2t 1 ≤ 0 14 ms) with the experimental data fitting a Gaussianshaped decay well.…”

Section: Discussionsupporting

confidence: 79%

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Homonuclear Vanadium-51 Dipolar Couplings in Inorganic Solids Obtained via Hahn Spin Echo Decay NMR Spectroscopy

Gee

2001

Solid State Nuclear Magnetic Resonance

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Section: Discussionsupporting

confidence: 79%

“…The second moment of the Hahn spin echo decay response of noninteger quadrupolar nuclei has been derived by a density matrix treatment [12]. Experimental homonuclear dipole-dipole second moments among 23 Na (I = 3/2) nuclei in crystalline and amorphous solids have been obtained via Hahn spin echo decay spectroscopy [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Homonuclear Vanadium-51 Dipolar Couplings in Inorganic Solids Obtained via Hahn Spin Echo Decay NMR Spectroscopy

Gee

2001

Solid State Nuclear Magnetic Resonance

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“…(23) was confirmed experimentally for homonuclear 23 Na-23 Na dipole-dipole interactions in crystalline solids, for which the M 2 values are readily calculable from the known crystal structures [17].…”

Section: Spin Echo Decay Spectroscopymentioning

confidence: 60%

“…In practice a data range of 2t 1 < 200 μs is a good compromise between minimizing this systematic error and ensuring a sufficiently widely spaced number of data points. If the deviations are particularly large, M 2 values can also be determined as a function of data range, and extrapolated to the origin [17]. Finally, in glasses sub-ambient temperatures (T < 200 K) are generally required to suppress any dynamic contributions to the 23 Na spin echo decays.…”

Section: Spin Echo Decay Spectroscopymentioning

confidence: 99%

Short and Medium Range Order in Ion-Conducting Glasses Studied by Modern Solid State NMR Techniques

Eckert¹

2010

Zeitschrift Für Physikalische Chemie

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Glass Structure / Solid State NMR Spectroscopy / Structure-Property RelationsGlassy ionic conductors have attained considerable importance in the solid state battery technology field. To understand the influence of composition on ionic mobility and transport, information about the local and dynamic environments of the mobile ions in glasses is required. Solid state NMR spectroscopy is one of the most powerful tools for addressing these questions. Our research effort in this area comprises (1) the development of efficient techniques and strategies for the study of disordered materials, (2) the detailed application of optimized measurement and data analysis protocols to different glass systems under systematic compositional variation, and (3) the comprehensive interpretation of the results obtained in the overall literature context. This article attempts to convey a concise overview of our contribution to this field over the period from 2004 to 2010, to describe the most significant insights obtained and to place them into the overall field of Solid State Ionics.

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“…For T = 4000 K the distribution is essentially statistical, as expected for a dominance of entropic contributions. It is known experimentally from the study of alkali silicates [32,33] that for smaller alkali concentration the alkali ions start to form clusters and indeed we observe in so far unpublished work that for (Li 2 O)9(SiO 2 ) h(r = 4.4Å) ≈ 1.5.…”

Section: Structurementioning

confidence: 87%

Characterization of the complex ion dynamics in lithium silicate glasses via computer simulations

Heuer¹,

Kunow²,

Vogel³

et al. 2002

Phys. Chem. Chem. Phys.

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We present results of molecular dynamics simulations on lithium metasilicate over a broad range of temperatures for which the silicate network is frozen in but the lithium ions can still be equilibrated. The lithium dynamics is studied via the analysis of different correlation functions. The activation energy for the lithium mobility agrees very well with experimental data. The correlation of the dynamics of adjacent ions is weak. At low temperatures the dynamics can be separated into local vibrational dynamics and hopping events between adjacent lithium sites. The derivative of the mean square displacement displays several characteristic time regimes. They can be directly mapped onto respective frequency regimes for the conductivity. In particular it is possible to identify time regimes dominated by localized dynamics and longrange dynamics, respectively. The question of time-temperature superposition is discussed for the mean square displacement and the incoherent scattering function.

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23Na nuclear magnetic resonance spin echo decay spectroscopy of sodium silicate glasses and crystalline model compounds

Cited by 69 publications

References 34 publications

Homonuclear Vanadium-51 Dipolar Couplings in Inorganic Solids Obtained via Hahn Spin Echo Decay NMR Spectroscopy

Homonuclear Vanadium-51 Dipolar Couplings in Inorganic Solids Obtained via Hahn Spin Echo Decay NMR Spectroscopy

Short and Medium Range Order in Ion-Conducting Glasses Studied by Modern Solid State NMR Techniques

Characterization of the complex ion dynamics in lithium silicate glasses via computer simulations

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