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Thermal Emissivity of a Nuclear Graphite as a Function of Its Oxidation Degree (2) - Effect of Surface Structural Changes -

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2009, 10(4), pp.300-304
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General

서승국 1 Eung-Seon Kim 2 Se-Hwan Chi 3 Suk Hwan Kim 4 Sang Woo Lee 4 Roh, Jae-Seung 1

1금오공과대학교
2Korea Atomic Energy Research Institute (KAERI)
3Korea Atomic Energy Research Institute (KAERI),
4Kumoh National Institute of Technology

Candidate

ABSTRACT

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.

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