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Modifying aluminum-water reaction to generate nano-sized aluminum hydroxide particles beside hydrogen

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Nematollahi,  Gholamali Ali
Adaptive Structural Materials (Simulation), Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Citation

Razavi Tousi, S. S., Nematollahi, G. A., Ebadzadeh, T., & Szpunar, J. A. (2013). Modifying aluminum-water reaction to generate nano-sized aluminum hydroxide particles beside hydrogen. Powder Technology, 241, 166-173. doi:10.1016/j.powtec.2013.03.025.


Cite as: https://hdl.handle.net/21.11116/0000-0001-D830-5
Abstract
Al-water reaction is used to produce nanoparticles of aluminum hydroxide. Ball-milling of aluminum powder in water was examined for promoting this reaction. Scanning electron microscopy and X-ray diffraction assisted by Rietveld refinement were used to study the by-products of the reaction. Results showed that the activated Al powder completely reacted with water at room temperature. Hydrogen, gibbsite and bayerite were formed at the end of the reaction. A mechanism is proposed to explain how wet milling of Al powder can promote the reaction. The morphology of the by-products changed with the milling time. Notably the samples milled for 7 and 12. h had the shapes of nanospheres, nanospindles and nanorods. The calcination process made in conventional furnace and microwave oven changed the morphology of the produced alumina phases. © 2013 Elsevier B.V.