Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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SiC powders synthesized from rice husk

왕겨로부터 합성된 탄화규소 분말

  • Park, Tae-Eon (Ecotechkorea Co., LTD.) ;
  • Hwang, Jun Yeon (Carbon Composite Materials Research Center, Institute of Advanced Composites Materials, KIST, Jeonbuk Branch) ;
  • Lim, Jin Seong (Carbon Composite Materials Research Center, Institute of Advanced Composites Materials, KIST, Jeonbuk Branch) ;
  • Yun, Young-Hoon (Dept. of Hydrogen & Fuel Cell Tech., Dongshin University)
  • 박태언 ((주)에코텍코리아) ;
  • 황준연 (탄소융합소재연구센터, 복합소재기술연구소, 한국과학기술원 전북분원) ;
  • 임진성 (탄소융합소재연구센터, 복합소재기술연구소, 한국과학기술원 전북분원) ;
  • 윤영훈 (동신대학교 수소에너지학과)
  • Received : 2016.03.31
  • Accepted : 2016.09.23
  • Published : 2016.10.31
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Abstract

In this work, the SiC powders were synthesized through the carbonized matter from the mixture of silica powder and rice husks. The SiC powders, obtained from the carbothermal reduction reaction of silica and carbonized rice husks, were investigated by XRD patterns, XPS, FE-SEM and FE-TEM. In the XRD patterns, the specimens showed clearly very high strong peak of (111) plane near $35^{\circ}$ as well as weak (220) and (311) peak respectively at approximately $60^{\circ}$ and $72^{\circ}$. Under Ar atmosphere, the power synthesized from the mixture (in case of mixing ratio, 6 : 4) of carbonized rice husks and silica showed mainly cubic SiC crystalline phase showing relatively lower ratio of hexagonal phase without residual carbon in XRD pattern. In the TEM analysis, the specimen, synthesized from carbonized rice husks and silica with mixing ratio of 6 : 4 under Ar atmosphere, showed relatively fine particles under $5{\mu}m$ and a crystalline SiC phase of (100) diffraction pattern.

본 연구에서는, 실리카 분말과 왕겨의 혼합체로부터 탄화된 물질로부터, 탄화규소 (SiC) 분말이 합성되었다. 탄화왕겨와 실리카의 열탄화환원 반응을 통해 얻어진, SiC 시료는 XRD 회절 패턴, FE-SEM 및 FE-TEM을 통해 분석되었다. 시료들은 XRD 패턴에서, $35^{\circ}$ 부근의 (111) peak는 매우 높은 intensity를 나타내었고, $60^{\circ}$, $72^{\circ}$ 부근의 (220), (311) peak 등 탄화규소 결정상에 대한 peak pattern이 명확하게 관찰되었다. Ar 분위기에서 탄화왕겨와 실리카의 혼합비율이 6 : 4인 혼합물로부터 합성된 시료는 XRD 패턴에서 잔류카본이 검출되지 않았으며, hexagonal 결정상의 비율이 비교적 낮고, cubic SiC 결정상이 주도적으로 나타내었다. 탄화왕겨와 실리카의 혼합비율이 6 : 4인 경우에 합성된 시료는 $5{\mu}m$ 이하의 미세한 입자들이 관찰되었으며, TEM 분석결과에서, SiC 결정질상의 (110) 회절패턴 형태를 나타내었다.

Keywords

References

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