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Water-soluble amorphous alumina-based ceramic precursors and alumosols: Structural and chemical characterization

McMillan, PF; Diefenbacher, JR; Petuskey, WT; Goettler, RW; (2009) Water-soluble amorphous alumina-based ceramic precursors and alumosols: Structural and chemical characterization. Journal of Non-Crystalline Solids , 355 (28-30) pp. 1539-1551. 10.1016/j.jnoncrysol.2008.11.044.

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Abstract

We examined the solid-state water-soluble amorphous precursors that are formed by partial thermal decomposition of Al(NO 3 ) 3 ·9H 2 O (aluminum nitrate nonahydrate: ANN) using Raman and FTIR and solid-state magic-angle spinning NMR spectroscopy. We also studied the species formed in the aqueous alumosols formed by dissolution of the pre-ceramic precursors using 27 Al NMR spectroscopy. Species identified in the alumosols included the Al 3+ (H 2 O) 6 monomer, the [AlO 4 Al 12 (OH) 24 (H 2 O) 12 ] 7+ (Al 13 ) Keggin ion, and the Al 30 polycation, [Al 30 O 8 (OH) 56 (H 2 O) 24 ] 18+ , as well as various other oligomers or nanoparticles containing IV-, V- and VI-coordinated Al 3+ ions. © 2009 Elsevier B.V. All rights reserved.

Type: Article
Title: Water-soluble amorphous alumina-based ceramic precursors and alumosols: Structural and chemical characterization
DOI: 10.1016/j.jnoncrysol.2008.11.044
UCL classification: UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Maths and Physical Sciences
URI: http://discovery.ucl.ac.uk/id/eprint/679848
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