Preparation of Aluminum Nanoparticles and Oxidation Mechanism of Nano- and Micro-Particles

Liang Chen; Lei Liu; Zhen Li; Cheng Jing Xiao; Tao Wei

doi:10.4028/www.scientific.net/AMR.690-693.485

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 690-693Preparation of Aluminum Nanoparticles and...

Preparation of Aluminum Nanoparticles and Oxidation Mechanism of Nano- and Micro-Particles

Abstract:

Aluminum nanoparticles were prepared by laser and inducting heating methods, then the phase, structure and thermal properties of them were characterized by X-ray diffraction, electron microscope and simultaneous thermal analyzer, respectively. The results showed that there was great difference between micro- and nanoparticles in oxidation behavior. Aluminum micron particles had a very strong endothermic peak at the temperature of about 660°C and the absorption heat enthalpy is 328J/g.The release heat enthalpies of aluminum nanoparticles oxidized by oxygen are 4.219 kJ/g and 3.584 kJ/g. Because of the size decreases to nano-size, the aluminum nanoparticles can be oxidized directly by oxygen and release a large amount of heat, which is beneficial to the propellants when it been burn. However, the micro-particles should absorb heat which other components released, and release heat slowly after melted, which are not as good as the nano-ones.

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Periodical:

Advanced Materials Research (Volumes 690-693)

Pages:

485-489

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.690-693.485

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Online since:

May 2013

Authors:

Liang Chen*, Lei Liu, Zhen Li, Cheng Jing Xiao, Tao Wei

Keywords:

Aluminum Particles, Core-Shell Structure, Nanomaterial, Oxidation Mechanism

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