Mechanochemical synthesis of γ-LiAlO2 studied by 6Li and 27Al NMR and synchrotron X-Ray diffraction
| Autor: | V. P. Isupov, M. R. Sharafutdinov, D. F. Khabibulin, L. E. Chupakhina, O. B. Lapina, O. A. Kharlamova |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
General Chemical Engineering Lithium carbonate Inorganic chemistry Metals and Alloys chemistry.chemical_element Lithium aluminate Lithium hydroxide Amorphous solid Inorganic Chemistry chemistry.chemical_compound chemistry Aluminium Phase (matter) Materials Chemistry Hydroxide Physical chemistry Carbonate |
| Zdroj: | Inorganic Materials. 47:763-767 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s0020168511070120 |
| Popis: | The structural transformations accompanying the mechanochemical synthesis of fine-particle γ-LiAlO2 have been studied by 6Li and 27Al NMR and in situ X-ray diffraction. Mechanical activation of a mixture of aluminum hydroxide and lithium carbonate in an AGO-2 planetary mill results not only in size reduction, intermixing, and partial amorphization of the starting materials but also in the mechanochemical synthesis of a carbonate form of aluminum lithium hydroxide. Subsequent heat treatment of the mechanically activated mixture leads to the release of water and carbon dioxide molecules and the formation of an X-ray amorphous phase containing aluminum in octahedral and tetrahedral oxygen coordination. The X-ray amorphous material converts to gamma lithium aluminate through an intermediate phase. |
| Databáze: | OpenAIRE |
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