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http://dx.doi.org/10.7842/kigas.2014.18.5.20

Explosion Properties of Nano and Micro-sized Aluminium Particles  

Han, Ou-Sup (Occupational Safety & Health Research Institute, KOSHA)
Lee, Keun-Won (Occupational Safety & Health Research Institute, KOSHA)
Publication Information
Journal of the Korean Institute of Gas / v.18, no.5, 2014 , pp. 20-25 More about this Journal
Abstract
Explosion characteristics of micro-sized aluminum dusts had been studied by many researchers, but the research of nano-sized aluminum dusts were very insufficient. In this study, an experimental investigation was carried out on the influences of nano and micro-sized aluminum dusts (70 nm, 100 nm, $6{\mu}m$, $15{\mu}m$) on dust explosion properties of aluminum particles by using 20 L explosion apparatus. With decreasing of particle size in suspended aluminum dusts, the LEC (lower explosion concentration) of nano-sized aluminum is lower than that of micro-sized aluminum. The particle size change of nano-sized aluminum dusts seems no obvious explosion differences than that of micro-sized aluminum dusts. From the observation of nano-sized aluminum particles by TEM (Transmission Electron Microscopy), it is estimated that increase of particles aggregation may have effects on the explosion characteristics of aluminum nanopowders.
Keywords
aluminium nanopowder; dust explosion; explosion pressure; lower explosion concentration;
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