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Vol.43, No.3, 255 ~ 263, 2005
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| Title |
| A Study on the Preparation of High Purity Copper by Zone Refining |
| 윤영옥 Young Ok Yoon , 조형호 Hyung Ho Jo , 조훈 Hoon Cho , 김세광 Shae Kwang Kim , 김영직 Young Jik Kim |
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| Abstract |
| The refining efficiency of high-purity Cu was investigated prepared by zone refining, with respect to travel rate, distribution coefficient, number of pass and zone length. Especially, to investigate refining efficiency with respect to zone length, experimental and computer simulation results were compared. The composition of the refined high-purity Cu was analyzed by GDOS (Glow Discharge Optical Spectroscopy) and GDMS (Glow Discharge Mass Spectrometer). The composition profiles of each segment at the given condition were compared with the results of micro hardness profiles. The results showed that the refining efficiency was inversely proportional to the travel rate, while it was proportional to the number of pass. The travel rate was more effective than the number of pass to enhance the refining efficiency in zone refining process. Impurities whose distribution coefficients are below 0.5 were removed efficiently. The effectively refined region increased with decreasing the zone length from 45 mm to 30 mm. Especially, the element S, which is known to be hardly removed by zone refining, could be removed to a level of under 0.1 ppm over the 60% region at 1 mm/min. (Received July 22, 2004) |
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| Key Words |
| High-purity copper, Zone refining, Travel rate, Number of pass, Zone Length, Distribution coefficient |
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