Characterization of metallurgical-grade aluminas and their precursors by 27Al NMR and XRD

Perander, L.M. and Zujovic, Z.D. and Groutso, T. and Hyland, M.M. and Smith, M.E. and O'Dell, L.A. and Metson, J.B. (2007) Characterization of metallurgical-grade aluminas and their precursors by 27Al NMR and XRD. Canadian Journal of Chemistry, 85 (10). pp. 889-897. ISSN 0008-4042

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Abstract

The structure of metallurgical- or smelter-grade aluminas (MGAs) is complex and poorly understood. Ultra-high-field solid-state 27Al NMR results on industrial as well as on laboratory-prepared aluminas are discussed in relation to XRD results. It is demonstrated that high-field NMR can effectively be used to quantify the proportion of the thermodynamically stable alpha-alumina phase in these materials. The results demonstrate that 27Al NMR is a vital adjunct to XRD methods to quantify the transition alumina phases that invariably dominate the MGAs. The nature of the disorder in these materials, determined by 27Al NMR, is also compared with literature data, such as XANES and EXAFS studies, on typical laboratory-prepared materials. The utility of 27Al NMR studies to provide new insight into the structural complexity of metallurgical aluminas is shown. © 2007 NRC Canada.

Item Type:
Journal Article
Journal or Publication Title:
Canadian Journal of Chemistry
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1500/1503
Subjects:
Departments:
ID Code:
130318
Deposited By:
Deposited On:
04 Jan 2019 12:15
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 11:44