Growth of fractal structures in flames with silicon admixture
| Autor: | Howard Levinsky, P. Visser, J.Th.M. De Hosson, V.M. van Essen, D. Vainchtein, A.V. Mokhov, M. V. Dutka, Sander Gersen, B. M. Smirnov |
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| Přispěvatelé: | Zernike Institute for Advanced Materials |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Hexamethyldisiloxane
COUNTERFLOW DIFFUSION FLAME Materials science Atmospheric pressure Silicon SURFACE General Physics and Astronomy chemistry.chemical_element OXIDE AGGREGATION Combustion Fractal dimension Methane Nanoclusters chemistry.chemical_compound Fractal chemistry Chemical physics GAS PARTICLES CLUSTERS |
| Zdroj: | Europhysics Letters, 98(6):66005. IOP PUBLISHING LTD |
| ISSN: | 0295-5075 |
| Popis: | Transmission electron microscopy (TEM) measurements and theoretical analysis are combined to construct the physical picture of formation of SiO2 fractal aggregates in a methane/hexamethyldisiloxane/air atmospheric pressure flame. The formation of SiO2 fractal aggregates is described as a multistage process. The first stage is combustion of fuel in a narrow flame front region with formation of main combustion products including SiO2 molecules. Further downstream SiO2 molecules join in liquid nanoclusters. After cooling combustion products due to heat losses to surroundings, the nanoclusters become solid in a cold flame region and join in fractal aggregates there. Along with growth of fractal aggregates, the restructuring process proceeds in a cold flame region that leads to the decrease of the fractal dimension of fractal aggregates. The measured parameters of fractal aggregates are in accord with those followed from theoretical models. Copyright (C) EPLA, 2012 |
| Databáze: | OpenAIRE |
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