Study of sodium polyaluminate reaction mechanisms with an air atmosphere

Study of sodium polyaluminate reaction mechanisms with an air atmosphere X-ray-phase and thermal analysis methods, and also IR-spectrometry are used to study reaction mechanisms for sodium polyaluminate (SPA) nanopowder and high-temperature ceramic based on sodium β″-alumina with water vapor and air carbon dioxide. It is shown that with exposure of SPA in a moist air atmosphere as a result of forming the hydroxonium form of β″alumina (H3O-β″-alumina) and hydroxyl OH– groups, there is breakdown of the sodium-beta-alumina structure. Features of SPA phase transformations with prolonged storage in air at room temperature and heating products of decomposition up to 1200°C are studied. Processes of beta-alumina structure breakdown are reversible in nature, but in ceramic lead to irreversible changes of surface layer composition. Refractories and Industrial Ceramics Springer Journals

Study of sodium polyaluminate reaction mechanisms with an air atmosphere

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Springer US
Copyright © 2012 by Springer Science+Business Media New York
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
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