Mechanochemical synthesis of CeB6 nanopowder
- Mechanochemical synthesis of CeB6 nanopowder
- 심재혁; 이영수; 하태준; 이준호
- CeB6; Mechanochemical synthesis; Nanopowder; Milling; X-ray diffraction; Transmission electron microscopy; Mechanically induced self-sustaining reaction
- Issue Date
- Ceramics international
- VOL 45, NO 15-19446
- 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.
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