• Title/Summary/Keyword: ${\beta}$-cristobalite

Search Result 13, Processing Time 0.022 seconds

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))

  • Kwon, Woo Teck;Kim, Soo Ryong;Kim, Younghee;Lee, Yoon Joo;Kim, Jong Il;Lee, Hyun Jae;Oh, Sea Cheon
    • Resources Recycling
    • /
    • v.22 no.3
    • /
    • pp.28-35
    • /
    • 2013
  • 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.

A Study on the Structural Analysis of Amorphous Silicondioxide Prepared Sol-Gel Method with XRD (X-선 회절을 이용한 비정질 SiO$_2$ Gel 의 구조 해석에 관한 연구)

  • Yoon dai Hyun;Kim Ki Sun;Jung Hyun Chai
    • Journal of the Korean Chemical Society
    • /
    • v.34 no.5
    • /
    • pp.413-417
    • /
    • 1990
  • The structural variation process of amorphous SiO$_2$ gel upon heat-treatment conditions of 80, 250, 450 and 1000$^{\circ}C$ has been studied by using the radial distribution functions (RDF$_{obs}$) estimated from the X-ray diffraction intensities. The expected gel structure was determined by comparing the RDF$_{obs}$ with those for the other six standard samples selected appropriately. The structure of specimens prepared by sol-gel method is well consistent with that of fused SiO$_2$ (${\beta}$-cristobalite with cubic symmetry) except a slight difference in O-O band distance.

  • PDF

The Scientific Analysis of Floor Tile Excavated from the Beobgwangsa Temple Site in the Pohang (포항 법광사지 출토 녹유전의 자연 과학적 조사)

  • Moon Whan-Suk;Han Min-Su;Hwang Jin-Ju;Kim Ho-Sang
    • KOMUNHWA
    • /
    • no.60
    • /
    • pp.101-120
    • /
    • 2002
  • The floor tile on a coated green-glass was excavated from the Beobgwangsa Temple Site in the Pohang City. We analyzed using the MXRD, ICP-AES, EDXRF, TG/DTA and TIMS. As a result of microscope analysis, it was composed of quartz, feldspar and clay particl

  • PDF