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자료유형
동향자료
저자정보
Seo, Seung-Kuk (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology) Roh, Jae-Seung (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology) Kim, Suk-Hwan (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology) Chi, Se-Hwan (Korea Atomic Energy Research Institute) Kim, Eung-Seon (Korea Atomic Energy Research Institute)
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한국탄소학회 Carbon letters Carbon letters 제12권 제1호
발행연도
2011.1
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8 - 15 (8page)

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We study the relationships between the thermal emissivity of nuclear graphites (IG-110, PCEA, IG-430 and NBG-18) and their surface structural change by oxidation using scanning electron microscope and X-ray diffraction (XRD). The nonoxidized (0% weight loss) specimen had the surface covered with glassy materials and the 5% and 10% oxidized specimens, however, showed high roughness of the surface without glassy materials. During oxidation the binder materials were oxidized first and then graphitic filler particles were subsequently oxidized. The 002 interlayer spacings of the non-oxidized and the oxidized specimens were about $3.38{\sim}3.39{\AA}$. There was a slight change in crystallite size after oxidation compared to the nonoxidized specimens. It was difficult to find a relationship between the thermal emissivity and the structural parameters obtained from the XRD analysis.

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