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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Ball milling
Powders
Oxides
Diffraction patterns
Particle size
Transmission electron microscopy
X ray diffraction
Scanning electron microscopy
cerous chloride
boron oxide

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

Cite this

Mechanochemical synthesis of CeB6 nanopowder. / Ha, Taejun; Lee, Young Su; Lee, Joonho; Shim, Jae Hyeok.

In: Ceramics International, Vol. 45, No. 15, 15.10.2019, p. 19442-19446.

Research output: Contribution to journalArticle

Ha, Taejun ; Lee, Young Su ; Lee, Joonho ; Shim, Jae Hyeok. / Mechanochemical synthesis of CeB6 nanopowder. In: Ceramics International. 2019 ; Vol. 45, No. 15. pp. 19442-19446.
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