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Study on the Ignition Mechanism of Aluminum Nanoparticle by Fast Spectroscopy

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The ignition delay times and special spectral intensity of aluminum nanopowders reacting with propylene oxide were investigated by fast spectrum system triggered by synchronous shock light singles, and the ignition mechanism was presented from those data. X-ray diffraction (XRD) spectrum indicated that aluminum nanoparticle produced by plasma method has been oxidized for its high activity, X-ray photoelectron spectroscopy (XPS) of sample revealed that there is 3 nm oxide layer on its surface. XPS of the products showed that the oxide layer thickness will increase with the increasing shock wave strength. AlO(464.8 nm) ignition times investigated by monochromator revealed that aluminum nanoparticle will be equably distributed in propylene oxide vapor for increasing shock wave strength to increase its heating surface and heating rate, and shock wave will easily crack the 3 nm oxide layer on aluminum nanoprticle present chance for core active aluminum to react with oxygen atome and containing-oxygen molecule in the reaction system to ignite.
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Keywords: Agglomeration; Aluminum nanopowders; Ignition mechanism; Spectrum

Document Type: Research Article

Publication date: 01 August 2010

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  • Spectroscopy and Spectral Analysis, founded in 1981, is sponsored by the Chinese Central Iron & Steel Research Institute. "Spectroscopy and Spectral Analysis" has been indexed in SCI(1999), Ei(1992), MEDLINE(1999), and AJ (1999). "Spectroscopy and Spectral Analysis" publishes original contributions on various fields in Spectroscopy, including research results on laser spectroscopy, IR, Ramn, UV/Vis, Optical Emission, Absorption and Fluorescence spectroscopy, X-ray Fluorescence, and Spectrochemical Analysis, as well as Reseach paper, Research notes, Experimental Technique and Instrument, Review and Progress on the latest development of spectroscopy and spectrochemical anlysis, etc. "Spectroscopy and Spectral Analysis" is published monthly by Peking University Press with book sizes of large 16-mo format , and 292 pages per issue.
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