Mechanochemical synthesis of CeB6 nanopowder

Taejun Ha, Young Su Lee, Joonho Lee, Jae Hyeok Shim

Research output: Contribution to journalArticle

Abstract

Mechanochemical synthesis of CeB6 nanopowder was performed using a mixture of CeCl3, CeO2, B2O3 and either Mg or MgH2. The reaction for the CeO2-3B2O3-11MgH2 mixture to form CeB6 and MgO gradually proceeds during ball milling, while the mechanically induced self-propagating reaction (MSR) behavior is observed during ball milling of the CeO2-3B2O3-11 Mg mixture. X-ray diffraction patterns of the CeO2-3B2O3-11MgH2 mixture indicate that CeH2+x exists as an intermediate phase during the reaction. Scanning electron microscopy indicates that the particle size of CeB6 powder from the CeO2-3B2O3-11MgH2 mixture is much smaller than that from the CeO2-3B2O3-11 Mg mixture. Transmission electron microscopy revealed that CeB6 particles 10–30 nm in size from the CeO2-3B2O3-11MgH2 mixture are highly agglomerated with surface oxide layers. The mechanochemical reaction of the 2CeCl3-6B2O3-21MgH2 mixture produces CeB6 instead of Ce(BH4)3.

Original languageEnglish
Pages (from-to)19442-19446
Number of pages5
JournalCeramics International
Volume45
Issue number15
DOIs
Publication statusPublished - 2019 Oct 15

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Keywords

  • Borides
  • Electron microscopy
  • Mechanochemical processing
  • Powders: solid state reaction

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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