Li, Yong Xiu and Zhou, Xue Zhen and Wang, Yong and You, Xiao Zeng (2004) Preparation of nano-sized CeO2 by mechanochemical reaction of cerium carbonate with sodium hydroxide. Materials Letters, 58 (1-2). 245 - 249.
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The preparation of nano-sized CeO2 powder by mechanochemical reaction of hydrate cerium carbonate with sodium hydroxide and subsequent heat treatment was studied using X-ray diffraction, differential thermal and thermo gravimetric analyses, and transmission electron microscopy. It was found that the mechanochemical reaction process can be divided into two steps: the first step is the multi-phases mechanochemical reaction of cerium carbonate with NaOH to form amorphous cerium hydroxide, the second step is the crystallization of Ce(OH)4 to form crystalline CeO2·2H2O under a quasi-hydrothermal synthesis condition caused by the mechanical ball-milling. The CeO2 powder obtained from as-milled Ce2(CO3)3·8H2O+NaOH following water washing and heat treatment at 800 °C appears clearly separated monodisperse nano-size particles: their crystal sizes are from 10 to 20 nm and the medium size aggregated particles is 0.21 μm.
|Uncontrolled Keywords:||Nano-sized powder; Cerium oxide; Mechanochemical reaction; Ball milling|
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Deposited On:||24 Sep 2009 16:31|
|Last Modified:||24 Sep 2009 16:31|
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