Bastow, T.J. and Smith, M.E. and Whitfield, H.J. (1996) O-17 NMR investigation of hafnia and ternary hafnium oxides. Journal of Materials Chemistry, 6 (12). pp. 1951-1955. ISSN 0959-9428.
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Abstract
Structural evolution in alkoxide-derived amorphous HfO2 gels is followed by O-17 magic angle spinning (MAS) NMR in O-17-enriched samples, with crystallisation being identified readily at 500 degrees C. A series of O-17-enriched alkali-metal and alkaline-earth-metal hafnates with sodium chloride- and perovskite-related structures are also examined by O-17 MAS NMR spectroscopy. The number of oxygen resonances is related to the crystal structure. Comparison of O-17 NMR data is made to isostructural zircodium-containing compounds with the isotropic chemical shifts (Hf/Zr) in the ratio 0.86+/-0.02. O-17 NMR data are also presented from HfO2-SiO2 and HfO2-GeO2 gel mixtures.
| Item Type: | Article |
|---|---|
| Subjects: | Q Science Q Science > QD Chemistry |
| Divisions: | Faculties > Science Technology and Medical Studies > School of Physical Sciences |
| Depositing User: | M.A. Ziai |
| Date Deposited: | 16 May 2009 15:24 |
| Last Modified: | 16 May 2009 15:24 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/18808 (The current URI for this page, for reference purposes) |
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