Synthesis of cobalt boride nanoparticles using RF thermal plasma

Sooseok Choi, Lorico D.S. Lapitan, Yingying Cheng, Takayuki Watanabe

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


Nanosize cobalt boride particles were synthesized from the vapor phase using a 30 kW-4 MHz radio frequency (RF) thermal plasma. Cobalt and boron powder mixtures used as precursors in different composition and feed rate were evaporated immediately in the high temperature plasma and cobalt boride nanoparticles were produced through the quenching process. The X-ray diffractometry (XRD) patterns of cobalt boride nanoparticles prepared from the feed powder ratio of 1:2 and 1:3 for Co:B showed peaks that are associated with the Co2B and CoB crystal phases of cobalt boride. The XRD analysis revealed that increasing the powder feed rate results in a higher mass fraction and a larger crystalline diameter of cobalt boride nanoparticles. The images obtained by field emission scanning electron microscopy (FE-SEM) revealed that cobalt boride nanoparticles have a spherical morphology. The crystallite size of the particles estimated with XRD was found to be 18-22 nm.

Original languageEnglish
Pages (from-to)365-371
Number of pages7
JournalAdvanced Powder Technology
Issue number1
Publication statusPublished - Jan 2014

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Mechanics of Materials


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