Issue 12, 1996

17O NMR investigation of hafnia and ternary hafnium oxides

Abstract

Structural evolution in alkoxide-derived amorphous HfO2 gels is followed by 17O magic angle spinning (MAS) NMR in 17O-enriched samples, with crystallisation being identified readily at 500 °C. A series of 17O-enriched alkali-metal and alkaline-earth-metal hafnates with sodium chloride- and perovskite-related structures are also examined by 17O MAS NMR spectroscopy. The number of oxygen resonances is related to the crystal structure. Comparison of 17O NMR data is made to isostructural zirconium-containing compounds with the isotropic chemical shifts (Hf/Zr) in the ratio 0.86 ± 0.02. 17O NMR data are also presented from HfO2–SiO2 and HfO2–GeO2 gel mixtures.

Article information

Article type
Paper

J. Mater. Chem., 1996,6, 1951-1955

17 O NMR investigation of hafnia and ternary hafnium oxides

T. J. Bastow, M. E. Smith and H. J. Whitfield, J. Mater. Chem., 1996, 6, 1951 DOI: 10.1039/JM9960601951

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