Effect of Initial Silicon Scrap Size on Powder Refining Process During High Energy Ball Milling (HEBM)

Joon-Woo Song; Hyo-Seob Kim; Sung-Shin Kim; Jar-Myung Koo; Soon-Jik Hong

doi:10.4150/KPMI.2010.17.3.242

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폐실리콘의 고에너지 밀링 과정에서 초기 입자 크기가 분말의 미세화에 미치는 효과: 송준우, 김효섭, 김성신, 구자명, 홍순직
Effect of Initial Silicon Scrap Size on Powder Refining Process During High Energy Ball Milling (HEBM): Joon-Woo Song, Hyo-Seob Kim, Sung-Shin Kim, Jar-Myung Koo, Soon-Jik Hong; Journal of Korean Powder Metallurgy Institute 2010;17(3):242-250
DOI: https://doi.org/10.4150/KPMI.2010.17.3.242

¹공주대학교 신소재공학부
²공주대학교 신소재공학부
³실파인
⁴공주대학교 신소재공학부
⁵공주대학교 신소재공학부
¹Division of Advanced Materials Engineering & Institute for Rare Metals, Kongju National University
²Division of Advanced Materials Engineering & Institute for Rare Metals, Kongju National University
³Silfine. Co., LTD
⁴Division of Advanced Materials Engineering & Institute for Rare Metals, Kongju National University
⁵Division of Advanced Materials Engineering & Institute for Rare Metals, Kongju National University

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Abstract

In this research, the optimal manufacturing conditions of fine Si powders from Si scrap were investigated as a function of different initial powder size using the high-energy ball milling equipment, which produces the fine powder by means of an ultra high-energy within a short duration. The morphological change of the powders according to the milling time was observed by Scanning electron microscopy (SEM). With the increasing milling time, the size of Si powder was decreased. In addition, more energy and stress for milling were required with the decreasing initial powder size. The refinement of Si scrap was rapidly carried out at 10min ball milling time. However, the refined powder started to agglomerate at 30 min milling time, while the powder size became uniform at 60 min milling time.

Keywords: Microstructure;High energy milling;Si;Silicon scrap;Refinement;

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