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http://dx.doi.org/10.4150/KPMI.2006.13.3.205

The Effect of Composition on Hydrogen Reduction Behavior of Ball-milled WO3-CuO Nanocomposite Powders  

Jung Sung-Soo (Department of Metallurgy and Materials Science, Hanyang University)
Kang Yun-Sung (Department of Metallurgy and Materials Science, Hanyang University)
Lee Jai-Sung (Department of Metallurgy and Materials Science, Hanyang University)
Publication Information
Journal of Powder Materials / v.13, no.3, 2006 , pp. 205-210 More about this Journal
Abstract
The effect of Cu content on hydrogen reduction behavior of ball-milled $WO_3$-CuO nanocomposite powders was investigated. Hydrogen reduction behavior and reduction percent(${\alpha}$) of nanopowders were characterized by thermogravimetry (TG) and hygrometry measurements. Activation energy for hydrogen reduction of $WO_3$ nanopowders with different Cu content was calculated at each heating rate and reduction percent(${\alpha}$). The activation energy for reduction of $WO_3$ obtained in this study existed in the ranging from 129 to 139 kJ/mol, which was in accordance with the activation energy for $WO_3$ powder reduction of conventional micron-sized.
Keywords
W-Cu; Nanocomposite powder; Hydrogen reduction; Activation energy; Reduction kinetics;
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