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Preparation of 6N grade silicon ingot by combined purification processes from waste silicon cutting sludge

  • Jung-Min Oh , Hyekyoung Kim , Hankwon Chang , Back-Kyu Lee , Hee Dong Jang and Jae-Won Lim
Published/Copyright: September 10, 2015
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 106 Issue 9

Abstract

This study is aimed at fabricating ultrahigh-purity silicon ingots from silicon cutting sludge – a byproduct of the ingot for solar cells cutting process. Firstly, silicon powder from the silicon cutting sludge was recovered by 1st purification, such as ultrasonication, centrifugation, and acid treatment before preparation of the silicon ingots. After the 1st purification, the silicon cutting sludge yielded silicon powder with a purity of 99.7612 %. The 1st-purified silicon powder was subjected to 2nd purification – 3 cycles hydrogen plasma arc melting (HPAM), resulting in ultrahigh-purity silicon ingot with a purity of 99.9999 %. HPAM has been verified to be an effective process for removal of B and P – the major impurities of silicon for semiconductors and solar cells – to levels of total ≤ 0.3 ppm.

Keywords: Waste silicon cutting sludge; Purification; Hydrogen plasma arc melting (HPAM); Silicon

These authors contributed equally to this work as the first author.

*Correspondence address, Dr. Hee Dong Jang, Korea Institute of Geoscience and Mineral Resources, 124 Gwahang-no, Yuseong-gu, Daejeon 305-350, Korea, Tel.: +82 42 868 3612, Fax: +82 42 868 3415, E-mail:
** Prof. Jae-Won Lim, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeonbuk 561-756, Korea, Tel.: +82 63 270 2307, Fax: +82 63 270 2305, E-mail:

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Received: 2014-12-11
Accepted: 2015-05-13
Published Online: 2015-09-10
Published in Print: 2015-09-15

© 2015, Carl Hanser Verlag, München

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  1. Contents
  2. Contents
  3. Original Contributions
  4. Kinetics for gas–solid reactions involving dual-reaction interfaces
  5. Preparation of 6N grade silicon ingot by combined purification processes from waste silicon cutting sludge
  6. Material characterisation to identify the rheological behaviour for powder injection moulding
  7. Isothermal section of Nd–Mn–As phase diagram at 800 °C
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  10. The investigation of mechanical properties of B4C-reinforced AlSi7 foams
  11. The stabilising effect of oxides in foamed aluminium alloy scrap
  12. Physical chemistry of WC-12 %Co coatings deposited by thermal spraying at different standoff distances
  13. Experimental investigation on the tensile behavior of a transparent polyurethane interlayer
  14. Short Communications
  15. Linearized analysis of X-ray stress measurement using the Debye–Scherrer ring
  16. Gas induced semi-solid process effects on microstructure and mechanical properties of 319 aluminum alloy
  17. Ductile fracture behavior of low carbon high strength steel using continuum damage mechanics
  18. Fabrication of β-Si3N4 whiskers by microwave sintering using ZrO2–Y2O3–Al2O3 as liquid phase
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https://doi.org/10.3139/146.111272
Keywords for this article
Waste silicon cutting sludge; Purification; Hydrogen plasma arc melting (HPAM); Silicon

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Kinetics for gas–solid reactions involving dual-reaction interfaces
  5. Preparation of 6N grade silicon ingot by combined purification processes from waste silicon cutting sludge
  6. Material characterisation to identify the rheological behaviour for powder injection moulding
  7. Isothermal section of Nd–Mn–As phase diagram at 800 °C
  8. Influence of bath temperature and pH on the structure of electrodeposited cobalt nanowires
  9. Influence of combined grain refinement and modification on the microstructure, tensile strength and wear properties of Al-15Si, Al-15Si-4.5Cu alloys
  10. The investigation of mechanical properties of B4C-reinforced AlSi7 foams
  11. The stabilising effect of oxides in foamed aluminium alloy scrap
  12. Physical chemistry of WC-12 %Co coatings deposited by thermal spraying at different standoff distances
  13. Experimental investigation on the tensile behavior of a transparent polyurethane interlayer
  14. Short Communications
  15. Linearized analysis of X-ray stress measurement using the Debye–Scherrer ring
  16. Gas induced semi-solid process effects on microstructure and mechanical properties of 319 aluminum alloy
  17. Ductile fracture behavior of low carbon high strength steel using continuum damage mechanics
  18. Fabrication of β-Si3N4 whiskers by microwave sintering using ZrO2–Y2O3–Al2O3 as liquid phase
  19. People
  20. Berthold Scholtes on the occasion of his 65th birthday
  21. DGM News
  22. DGM News
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