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NMR Studies of Bond Arrangements in Alkali Phosphate Glasses
Proceedings of the 18th International Congress on Glass
  • Richard K. Brow, Missouri University of Science and Technology
  • Todd M. Alam
Abstract

Solid-state magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy has become a powerful tool for the investigation of local structure and medium range order in glasses. Previous P-31 MAS NMR studies have detailed the local structure for a series of phosphate glasses. Phosphate tetrahedra within the glass network are commonly described using the Q(sup n) notation, where n = 0, 1, 2, 3 and represents the number of bridging oxygens attached to the phosphate. Using P-31 MAS NMR different phosphate environments are readily identified and quantified. In this paper, the authors present a brief description of recent one dimensional (1D) Li-6, Li-7 and P-31 MAS experiments along with two-dimensional (2D) P-31 exchange NMR experiments for a series of lithium ultraphosphate glasses. From the 2D exchange experiments the connectivities between different Q(sup n) phosphate tetrahedra were directly measured, while the 1D experiments provided a measure of the P-O-P bond angle distribution and lithium coordination number as a function of Li2O concentration.

Department(s)
Materials Science and Engineering
Keywords and Phrases
  • Lithium Oxides,
  • Solid State,
  • Alkalies,
  • Chemical bonds,
  • Glass,
  • Lithium - isotopes,
  • Molecular structure,
  • Nuclear magnetic resonance,
  • Phosphates
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 1998 Japan Aerospace Exploration Agency (JAXA), All rights reserved.
Publication Date
1-1-1998
Publication Date
01 Jan 1998
Citation Information
Richard K. Brow and Todd M. Alam. "NMR Studies of Bond Arrangements in Alkali Phosphate Glasses" Proceedings of the 18th International Congress on Glass (1998)
Available at: http://works.bepress.com/richard-brow/89/