Appropriate Conditions for Preparation of Nanosized WO3 through High-Energy-Milling

Chun Huan Chen; Rui Ming Ren

doi:10.4028/www.scientific.net/AMR.194-196.665

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 194-196Appropriate Conditions for Preparation of...

Appropriate Conditions for Preparation of Nanosized WO₃ through High-Energy-Milling

Abstract:

In order to synthesize WC-Co nanopowders through an integrated mechanical and thermal activation process, WO₃-Co₂O₃-C nanopowders need to be obtained first. It is critical how to obtain the WO₃-Co₂O₃-C nanopowders efficiently. The effect of processing parameters on the grain size during high-energy-milling of WO₃-Co₂O₃-C mixed powders was studied via X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that the grain size of reactants can be effectively decreased with increasing the milling time, rotation speed, and charge ratio. After a certain time milling, both WO₃ and C powders achieve nano-level in grain size and mixed homogeneously. The appropriate milling parameters for fabricating nanosized WO₃+C+Co₂O₃ powders are suggested to be 4 to 8 hours of milling time, 400 RPM of rotation speed, and 40:1 to 60:1 of charge ratio.

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Periodical:

Advanced Materials Research (Volumes 194-196)

Pages:

665-668

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.194-196.665

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Online since:

February 2011

Authors:

Chun Huan Chen, Rui Ming Ren

Keywords:

Cement Carbide, High-Energy-Milling, Nanostructured Powder

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