ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Laser pyrolysis is a very suitable gas-phase process for the synthesis of a wide range ofnanoparticles at laboratory scale. The principle of the method is based on the decomposition ofgaseous or liquid reactants by a high power CO2 laser followed by a quenching effect. The literaturereports the possibility to produce carbides, nitrides, oxides, metals and composites nanoparticles bythis process. This paper reports a study of the effect of the laser intensity (using an innovativeoptical system) and of the gas flow rates on the characteristics (size and structure) of silicon carbide(SiC) nanoparticles produced at pilot scale (up to 1.13 kg/h) by using a mixture of silane (SiH4) andacetylene (C2H2). It has been shown that the decrease of the gas flow rate favors the increase of themean grain size of the particles and that the increase of the laser intensity seems to provoke anincrease of the mean crystal size and/or crystal number
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.534-536.85.pdf
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