| Abstract |
| The hydrogen reduction behavior of ultrasonic ball-milled WO3-CuO nanopowder, which is highly related with micro-pore structure, was investigated by thermogravimetry(TG) and hygrometry system. EDS and TEM results represented that the ultrasonic ball-milled WO3-CuO nanopowder consisted of the agglomerates which was confirmed as a homogeneous mixture of WO3 and CuO particles. It was found that the reduction reaction of CuO was retarded by initial micro-pores which are smaller than 40 nm in the ultrasonic ball-milled WO3-CuO nanopowder. The earlier agglomeration of Cu particles at comparably low temperature decreased the volume of micro-pores in the WO3-CuO nanopowder which caused the retardation of WO3 reduction reaction. These results clearly explain that the micro-pore structure significantly affected the reduction reaction of WO3 and CuO in the WO3-CuO nanopowder. |
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| Key Words |
| W-Cu, nanopowder, ultrasonic ball-milling, hydrogen reduction, hygrometry |
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