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Thermal Emissivity of a Nuclear Graphite as a Function of Its Oxidation Degree (2) - Effect of Surface Structural Changes -
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  • Journal title : Carbon letters
  • Volume 10, Issue 4,  2009, pp.300-304
  • Publisher : Korean Carbon Society
  • DOI : 10.5714/CL.2009.10.4.300
 Title & Authors
Thermal Emissivity of a Nuclear Graphite as a Function of Its Oxidation Degree (2) - Effect of Surface Structural Changes -
Seo, Seung-Kuk; Roh, Jae-Seung; Kim, Eung-Seon; Chi, Se-Hwan; Kim, Suk-Hwan; Lee, Sang-Woo;
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Thermal emissivity of nuclear graphite was measured with its oxidation degree. Commercial nuclear graphites (IG-110, PECA, IG-430, and NBG-18) have been used as samples. Concave on graphites surface increased as its oxidation degree increased, and R value (Id/Ig) of the graphites decreased as the oxidation degree increased. The thermal emissivity increased depending on the decrease of the R (Id/Ig) value through Raman spectroscopy analysis. It was determined that the thermal emissivity was influenced by the crystallinity of the nuclear graphite.
Nuclear graphite;Oxidation;Emissivity;Microstructure;Crystallinity;
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