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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Study of sodium polyaluminate reaction mechanisms with an air atmosphere

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Publisher
Springer US
Copyright
Copyright © 2012 by Springer Science+Business Media New York
Subject
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/s11148-012-9486-2
Publisher site
See Article on Publisher Site

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