Pyrophoricity of nano-sized aluminum particles

Document Type

Article

Publication Date

2-1-2012

Abstract

The temperature histories are calculated for spherical nano-sized aluminum particles with no protective oxide shell inserted in air at 300 K. In calculations, initial particle temperatures varied and the minimum initial temperature leading to the particle ignition was determined. The particle, initially without any oxide coating, was assumed to react adiabatically forming a monomolecular oxide coverage; the following oxidation was assumed to be governed by the Cabrera-Mott reaction mechanism. Convection and radiation heat losses were considered. Convection was accounted for using a transition regime heat transfer model by Fuchs. Aluminum particles with diameters less than about 68 nm are predicted to be pyrophoric, e.g., ignite without appreciable initial pre-heating. © Springer Science+Business Media B.V. 2012.

Identifier

84856069763 (Scopus)

Publication Title

Journal of Nanoparticle Research

External Full Text Location

https://doi.org/10.1007/s11051-012-0723-x

e-ISSN

1572896X

ISSN

13880764

Issue

2

Volume

14

Fund Ref

Defense Threat Reduction Agency

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