Dr. Zhiwei Han Profile

Dr. Zhiwei Han

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Proceedings Article | 3 April 2012 Paper

Synthesis and characterization of nano-CeO2 by detonation method

Zhi-wei Han, Li-feng Xie, Ou-qi Ni, Bin Li, Cheng Chao, Yi-chao Xie

Proceedings Volume 8409, 840910 (2012) https://doi.org/10.1117/12.920062

KEYWORDS: Explosives, Spherical lenses, Crystals, Oxygen, Transmission electron microscopy, Molecules, X-rays, Wavefronts, Iron, Diffraction

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In order to study the application of detonation synthesis method in preparing nanoscale ceria(CeO₂), ceria powder was synthesized by detonation method. The synthesis experiment was carried out in explosion containment vessel by initiating the emulsion explosive in which Ce(NO₃)₃·6H₂O acted as the main oxidant. The phase composition, crystal form, appearance and microstructure of the as-synthesized products were characterized by X-ray diffraction(XRD) and Transmission Electron Microscope(TEM). The result from XRD test indicated that the nanoscale ceria belonged to cubic phase. The mean size of ceria grain was 26nm based on the calculation result according to Scherrer equation. The result from TEM test presented that the as-synthesized ceria grain was spherical by appearance, and the size was uniform. According to TEM test result, the mean size of ceria grain was between 20nm and 30nm, which coincided with calculation result perfectly.

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