Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
권호 표지
DOI QR코드

DOI QR Code

Sintering Characteristics of Si/SiC Mixtures from Si Waste of Solar Cell Industry

태양광(太陽光) 산업(産業)에서 발생(發生)하는 Si/SiC 혼합물(混合物)의 소결특성(燒結特性) 연구(硏究)

  • 권우택 (한국세라믹기술원 에너지환경소재본부) ;
  • 김수룡 (한국세라믹기술원 에너지환경소재본부) ;
  • 김영희 (한국세라믹기술원 에너지환경소재본부) ;
  • 이윤주 (한국세라믹기술원 에너지환경소재본부) ;
  • 김종일 (한국세라믹기술원 에너지환경소재본부) ;
  • 이현재 ((주)엔바이온) ;
  • 오세천 (공주대학교 환경공학과)
  • Received : 2012.10.19
  • Accepted : 2013.02.22
  • Published : 2013.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

The recycling of the Si/SiC mixture sludge obtained from solar cell industry is very significant, environmentally and economically. The sintering characteristics of Si/SiC mixture sludge was studied for the purpose of recycling. In this study, to understand sintering behavior, SiC content in the Si/SiC mixture was controlled using an air separator. Various Si/SiC mixtures having different SiC contents were sintered using carbon black, clay and aluminum hydroxide as sintering aids. Physical properties of Si/SiC mixture and sintered bodies have been characterized using SEM, XRD, particle size analyzer and apparent density measurement. SEM and particle size analysis result confirmed that the fine particles less than 1 ${\mu}m$ decreased or removed more effectively through the air separator in the case of 95% SiC sample compared than the case of 75% SiC sample or original SiC sample. Further, with addition of the Aluminum Hydroxide, ${\beta}$-cristobalite phase gradually decreased while mullite phase gradually increased. The addition of the carbon black improved the sintering characteristics.

태양광 산업에서 폐기물로 발생하는 Si/SiC 혼합슬러지를 재활용하는 것은 환경과 경제적인 측면에서 중요하다. 이러한 재활용을 위해서 Si/SiC 혼합물의 소결특성을 분석하는 것이 필요하다. 본 연구에서는 SiC함량에 따른 소결특성을 살펴보기 위해서 공기분급기를 이용하여 Si/SiC 혼합물에서 SiC 함량을 변화시켰다. SiC 함량이 변화된 Si/SiC 혼합물에 카본블랙, 점토 및 수산화알루미늄을 첨가하여 소결하였다. Si/SiC 혼합물의 특성분석 및 첨가제 변화에 따른 Si/SiC 혼합물 소결체의 특성변화를 SEM, XRD, 입도분석 및 겉보기 밀도변화를 측정하여 분석하였다. SEM 및 입도분석결과, SiC 95% 시료의 경우에는 원시료 및 SiC 75% 시료와 비교하여 1 ${\mu}m$ 크기 이하의 미립입자가 크게 감소하여 공기분급을 통한 미세입자 제거가 SiC 함량 제어에 효과가 있음을 확인할 수 있었다. 수산화알루미늄을 첨가함에 따라서 ${\beta}$-Cristobalite 가 감소하고 mullite 생성량이 증가하였으며, 카본블랙의 첨가가 소결특성 향상에 영향을 주는 것을 확인하였다.

Keywords

References

  1. W. Koch, A. L. Endros, D. Franke, C. Haebler, J. P. Kalejs, H. J. Moeller, 2003 : Bulk crystal growth and wafering for PV Handbook of Photovoltaic Science and Engineering ; J. Whiley.
  2. Arjan Ciftja, Thorvald Abel Engh and Merete Tangstad, 2008 : Refining and Recycling of Silicon: A review. Norwegian university of science and technology.
  3. Vasilis Fthenakis et al, 2011 : Life Cycle Inventories and Life Cycle Assessments of Photovoltaic Systems, International Energy Agency(IEA) PVPS Task 12, Report T12-02:2011.
  4. V. M. Fthenakis, P. D Moskowitz, 2000 : Photovoltaics: Environmental, Health and Safety Issues and Perspectives, Prog. Photovolt. Res. Vol.8, pp. 27-28. https://doi.org/10.1002/(SICI)1099-159X(200001/02)8:1<27::AID-PIP296>3.0.CO;2-8
  5. T.Y. Wang et al, 2008 : A novel approach for recycling of kerf loss silicon from cutting slurry waste for solar cell applications, Journal of Crystal Growth, Vol.310, pp. 3403- 3406. https://doi.org/10.1016/j.jcrysgro.2008.04.031
  6. T.Y. Wang et al, 2009 : Recovery of silicon from kerf loss slurry waste for photovoltaic applications, Vol.17, Issue 3, pp 155-163. https://doi.org/10.1002/pip.863
  7. I. Lombardi et al, 2009 : High Yield Recycling Process of Silicon Kerf from Diamond Wire Wafering, 24th European Photovoltaic Solar Energy Conference, pp. 21-25 September 2009, Hamburg, Germany.
  8. Woo Teck Kwon, Soo Ryong Kim, Younghee Kim, Yoon Joo Lee, JiYeon Won, Won-Kyu PARK, Sea Cheon Oh, 2012 : Effect of temperature and carbon contents on the synthesis of ${\beta}$-SiC from silicon sludge by direct carbonization method, Materials Science Forum, Vol.724, pp. 45-48.
  9. Woo Teck Kwon, Soo Ryong Kim, Younghee Kim, Yoon Joo Lee, Eunjin Jung, Won-Kyu PARK, Sea Cheon Oh, 2012 : A Study on the Synthesis of SiC Powder from the Silicon Sludge of the Photovoltaic Industry, Materials Science Forum, Vol.724, pp. 49-52.
  10. Eun Jin Jung, Younghee Kim, Yoon Joo Lee, Soo Ryong Kim, Woo Teck Kwon, 2010 : A Study on the Preparation of SiC Nano powder from the Si Waste of Solar Cell Industry, J. of Korean Inst. of Resources Recycling, Vol.19(5), pp. 44-49.
  11. T. Kuniaki, O. Toyoko, K. Hideaki, I. Yoshiaki, Recycling of sludge containing silicon and reclaimed product thereby Patent number : JP9175851.
  12. Wu YF, Chen YM, 2009 : Separation of silicon and silicon carbide using an electrical field, Separation and Purification Technology, Vol.68(1), pp. 70-74. https://doi.org/10.1016/j.seppur.2009.04.009
  13. Z.H. Huang, D.C.Jia, Y.Zhou, Y.G.Liu, 2003 : A new sintering additive for silicon carbide ceramic, Ceramic International, Vol.29, pp. 13-17. https://doi.org/10.1016/S0272-8842(02)00082-2
  14. S. Prochazka, 1975 : The role of boron and carbon in the sintering of silicon carbide, in: P. Popper(Ed.), Special Ceramics, Vol.6 pp. 171-181.
  15. Necat Altinkok, Adem Demir, Ibranhim Ozsert, 2003 : Processing of $Al_2O_3$/SiC ceramic cake performs and their liquid Al metal infiltration, COMPOSITES, Part A 34, pp. 577-582. https://doi.org/10.1016/S1359-835X(03)00125-8
  16. V. Viswabaskaran, F.D. Gnanam, M. Balasubramanian 2003 : Mullitisation behaviour of calcined clay-alumina mixtures, Ceramics International, Vol.29 pp. 561-571. https://doi.org/10.1016/S0272-8842(02)00203-1