Magic angle spinning NMR of alkali phospho-alumino-silicate glasses
| Autor: | J.A. Collins, R. Dupree, Diane Holland, M. G. Mortuza, M.W.G. Lockyer |
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| Rok vydání: | 1989 |
| Předmět: |
Materials science
Metaphosphate Sodium Inorganic chemistry chemistry.chemical_element Condensed Matter Physics Alkali metal Silicate Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Aluminosilicate Phase (matter) Materials Chemistry Ceramics and Composites Magic angle spinning Sodium Phosphate Glass |
| Zdroj: | Journal of Non-Crystalline Solids. 112:111-119 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/0022-3093(89)90504-8 |
| Popis: | MAS-NMR has been used to explore the structure of sodium phospho-alumino-silicate glasses. Adding P 2 O 5 to sodium silicates causes repolymerisation of the silicate network and formation of sodium ortho-, pyro- and eventually metaphosphate units. At high P 2 O 5 concentrations the structure is determined by the incorporation of silica into a sodium phosphate glass as either chain end species or as an “SiP 2 O 7 ” phase. Removal of sodium from these glasses or substitution of alumina for P 2 O 5 destroys the “SiP 2 O 7 ” phase. |
| Databáze: | OpenAIRE |
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