Abstract
Conditions for the preparation of single-phase η-, θ-, and χ-aluminas were determined. The structures of η- and χ-aluminas were characterized. With the use of high-resolution electron microscopy, it was found that η-Al2O3 particles exhibited the most developed {111} face and consisted of coherently joined domains with a pronounced platelet shape. Planar defects in the (111) plane occurred in the η-Al2O3 particles. Microstructural differences between single-phase η-Al2O3 and γ-Al2O3 with a defect spinel structure were revealed. It was found that the η-Al2O3, χ-Al2O3, and θ-Al2O3 oxides are characterized by uniformly porous structures with average pore diameters of 47, 55, and 110 Å, respectively.
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Kul'ko, E.V., Ivanova, A.S., Litvak, G.S. et al. Preparation and Microstructural and Textural Characterization of Single-Phase Aluminum Oxides. Kinetics and Catalysis 45, 714–721 (2004). https://doi.org/10.1023/B:KICA.0000044984.09163.80
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DOI: https://doi.org/10.1023/B:KICA.0000044984.09163.80