Criterion conditions for the formation of hollow microspheres from plasma-treated agglomerated particles

Abstract

A theoretical analysis of the processes proceeding during treatment of agglomerated particles in plasma flows is performed within the context of obtaining hollow microspherical powders from such particles. For the first time, approximate theoretical solutions were used to formulate the criteria to the plasma flow, and also the criteria to the particle material characteristics, whose realization is required for forming hollow microspheres with maximum possible diameter and minimum wall thickness of the particle shell. The study can prove useful for workers engaged in the development of processes for obtaining and application of powder materials.

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Correspondence to O. P. Solonenko.

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This work was financially supported by the SB RAS Interdisciplinary Integration Project No. 98 for the years 2012 to 2014.

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Solonenko, O.P. Criterion conditions for the formation of hollow microspheres from plasma-treated agglomerated particles. Thermophys. Aeromech. 21, 735–746 (2014). https://doi.org/10.1134/S0869864314060080

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Key words

  • ultra-fine particle
  • agglomerate
  • plasma treatment of agglomerated powders
  • heat flux density
  • heating
  • melting
  • hollow microsphere
  • wall thickness
  • alumina