Paper Title:
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.

  Info
Periodical
Advanced Materials Research (Volumes 194-196)
Edited by
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
Pages
665-668
DOI
10.4028/www.scientific.net/AMR.194-196.665
Citation
C. H. Chen, R. M. Ren, "Appropriate Conditions for Preparation of Nanosized WO3 through High-Energy-Milling", Advanced Materials Research, Vols. 194-196, pp. 665-668, 2011
Online since
February 2011
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Price
$32.00
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