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Phase Formation in Combustion and Pyrolysis

  • Nickolai M. RubtsovEmail author
Chapter
Part of the Heat and Mass Transfer book series (HMT)

Abstract

A heterophaseous branching chain reaction of dichlorosilane oxidation is considered in terms of unsteady nucleation theory taking into account the condensation growth of nuclei.  The transition between the homogeneous and heterogeneous phase formation; the dependence of the amount of aerosol on the initial temperature, pressure, and mixture concentration; both the kinetics of phase formation and of the disappearance of initial substance are qualitatively described. It is shown that small inhibitor (propene) additives reduce the mean size of aerosol particles. This result is also in qualitative agreement with experimental data. It is found that the amount of aerosol formed decreases with increasing initial temperature because of the growing equilibrium vapor pressure of the new phase. The reactivity of the silicon dioxide aerosol obtained in the presence of Freon-12 varies reversibly. The role of surface diffusion and surface nucleation in the deposition of thin films is discussed. We have experimentally observed both the stable liquid and solid Coulomb crystals formed in the discharge-initiated combustion reaction between dichlorosilane and oxygen and the growth dynamics of formation of a rotating solid Coulomb crystal at the interface between the void and dusty cloud. Synthesis of threadlike nanostructures of silicon and silicon carbide with the method of chemical vapor deposition using dichlorosilane pyrolysis in the presence of CCl4 and CF2Cl2 in nitrogen was carried out. 

Keywords

Combustion Aerosol Thin film Transition Silicon dioxide Dichlorosilane oxidation Chain-branched Inhibitor Surface diffusion Surface nucleation Dusty plasma Coulomb crystal Threadlike nanostructures Silicon Silicon carbide 

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© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Russian Academy of SciencesInstitute of Structural Macrokinetics and Materials ScienceMoscowRussia

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