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Effect of Carbon Content on Mechanoreduction of Copper Oxide |
| LIU Lin1;YUAN Song-liu2;DONG Yuan-da3;CUI Kun1 |
| 1The State Key Laboratory of Plastic Forming Stimulation and Die & Mould Technology, Huazhong University of Science & Technology, Wuhan 430074
2Department of Physics, Huazhong University of Science & Technology, Wuhan 430074
3Institute of Materials, Shanghai University, Shanghai 200072
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| Cite this article: |
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LIU Lin, YUAN Song-liu, DONG Yuan-da et al 1999 Chin. Phys. Lett. 16 591-593 |
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Abstract The reduction of CuO with different amount of carbon (CuO:C=2:1, 2:1.5, and 2:2, in molar ratio) induced by ball milling is examined by x-ray diffraction and transmission electron microscopy. It is found that reduction process is closely related to the carbon content. CuO can be completely converted into Cu if an excessive C is used (i.e., C = 1.5 or 2.0mol). However, the reduction of CuO follows a two-step process, CuO→Cu→Cu2O, if the mixture only contains a nominal C content (i.e., C = 1 mol). A tentative model in terms of solid state reaction at the interfaces is proposed to explain the effect of carbon content on the mechanoreduction of CuO.
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| Keywords:
64.70.Kb
34.50.Lf
61.10.-i
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Published: 01 August 1999
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