Abstract
Silfine. Co., LTD, 374-2, Shinsuri, Eumbongmyeon, AsanCity, Chungnam, 336-862, Korea(Received May 7, 2010, Revised May 27, 2010, Accepted June 8, 2010)Abstract In this research, the optimal manufacturing conditions of fine Si powders from Si scrap were inves-tigated as a function of different initial powder size using the high-energy ball milling equipment, which producesthe fine powder by means of an ultra high-energy within a short duration. The morphological change of the pow-ders according to the milling time was observed by Scanning electron microscopy (SEM). With the increasingmilling time, the size of Si powder was decreased. In addition, more energy and stress for milling were requiredwith the decreasing initial powder size. The refinement of Si scrap was rapidly carried out at 10min ball millingtime. However, the refined powder started to agglomerate at 30 min milling time, while the powder size becameuniform at 60 min milling time.Keywords : Microstructure, High energy milling, Si, Silicon scrap, Refinement
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