http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
볼밀링한 WO<sub>3</sub>-CuO 나노복합분말의 조성에 따른 수소환원 거동
정성수,강윤성,이재성,Jung Sung-Soo,Kang Yun-Sung,Lee Jai-Sung 한국분말야금학회 2006 한국분말재료학회지 (KPMI) Vol.13 No.3
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.
초음파 밀링한 WO3-CuO 나노혼합분말의 수소환원 거동
정성수 ( Sung Soo Jung ),윤의식 ( Eui Sik Yoon ),이재성 ( Jai Sung Lee ) 대한금속·재료학회 2009 대한금속·재료학회지 Vol.47 No.9
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.