Formation mechanism of MgO hollow nanospheres via calcination of C-MgO composite produced by electric arc spraying

Dmitry V. Smovzh, Salavat Z. Sakhapov, Alexey V. Zaikovskii, Svetlana A. Chernova, Sergey A. Novopashin

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Spherical MgO nanoparticles were obtained using the method of electric arc spraying of the Mg-C composite electrode, followed by calcination in air. The composition and morphology of nanostructures, formed at spraying, were studied; kinetics of changes in the elemental composition of the carbon-magnesium composite was investigated at annealing in the range of up to 900 °C. It is shown that during arc spraying, core-shell nanoparticles are formed with a carbon core and shell enriched with magnesium nanoparticles, which are oxidized to MgO at contact with the atmosphere. When carbon-magnesium composites are annealed, carbon burns out; the morphology of magnesium oxide nanoparticles is a 250-nm sphere of magnesium crystals of 20–30 nm in size.

Original languageEnglish
Pages (from-to)7338-7343
Number of pages6
JournalCeramics International
Volume45
Issue number6
DOIs
Publication statusPublished - 15 Apr 2019

Keywords

  • Arc discharge
  • Calcination
  • Condensation
  • MgO
  • Nanoceramics
  • Nucleation
  • Powders
  • PERFORMANCE
  • ADSORBENTS
  • GRAPHENE
  • NANOCRYSTALLINE MAGNESIUM-OXIDE
  • NANOSTRUCTURES
  • CO2 CAPTURE
  • NANOPARTICLES
  • REFRACTORIES
  • RAPID SYNTHESIS
  • MORPHOLOGY

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