Enhancing Hydrogen‐Generation Performance of γ‐
2 Al 3 Modified O Powder by Ultrasonic Dispersion
Previous work indicated that γ‐
2 Al 3 modified O powder could react with water and generate hydrogen under ambient conditions.
In this work, an ultrasonic dispersion procedure was used to disperse and mix the Al and γ‐ Al 2 Al 3 powders. It was found that γ‐ O 2 Al 3
modified O powder prepared by the ultrasonic procedure has a higher hydrogen‐generation speed than that prepared by a traditional ball‐milling method. Microstructure analyses showed that the ultrasonic procedure greatly eliminated the
agglomeration of Al and γ‐ Al 2 Al 3 powders so that γ‐ O 2 Al 3
grains covered O particle surfaces more uniformly. This implies that a favorable processing procedure is the key to obtain high performance modified Al powder.
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Document Type: Research Article
Publication date: April 1, 2012