Effect of the solid precursors on the formation of nanosized TiB x powders in RF thermal plasma

Szilvia Klébert, Anna Mária Keszler, István Sajó, Eszter Drotár, Imre Bertóti, Eszter Bódis, Péter Fazekas, Zoltán Károly, János Szépvölgyi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Continuous synthesis of TiBx (x≈0.5-2) nanoparticles from various low cost solid precursors such as titanium and titanium dioxide admixed with boron and/or carbon in radiofrequency thermal plasma was studied. Feasibility of TiB2 formation was predicted by thermodynamic equilibrium calculations in the 500-5000 K temperature range. In all the investigated system high temperature reactions resulted in nanometer-sized TiBx powders with a mean size varying between 13 and 83 nm. The yield of particular runs ranged from 38% to 97%. Among the synthesized products in addition to TiBx, oxidized precursor residues were also found in smaller quantities. Although addition of carbon to the precursors could not completely prevent surface oxidation of boride particles, it contributed to the reduction of the mean particle size of the formed TiB2.

Original languageEnglish
Pages (from-to)3925-3931
Number of pages7
JournalCeramics International
Volume40
Issue number3
DOIs
Publication statusPublished - Apr 1 2014

Keywords

  • A. Powders: chemical preparation
  • A. Powders: gas phase reaction
  • A. RF plasma synthesis
  • D. Borides

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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