Thermal Emissivity of Nuclear Graphite as a Function of Its Oxidation Degree (1)-Effects of Density, Porosity, and Microstructure
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon Letters / 10권 / 3호
ㆍ저자명 : Seung-Kuk Seo, Jae-Seung Roh1, Eung-Seon Kim, Se-Hwan Chi, Suk H
ㆍ저자명 : Seung-Kuk Seo, Jae-Seung Roh1, Eung-Seon Kim, Se-Hwan Chi, Suk H
목차
1. Introduction2. Experimental method
3. Result
4. Conclusion
Reference
한국어 초록
Thermal emissivity of commercial nuclear graphites (IG-110, PCEA, IG-430 and NBG-18) following changes in oxidationdegrees were examined. Specimens were oxidized to 0%, 5%, and 10% in air flow of 5l/min at 600oC using a furnace, and the
thermal emissivities were measured using an infrared spectrum analyzer. The measuring temperatures for the thermal
emissivity were 100oC, 200oC, 300oC, 400oC and 500oC. Also density and porosity of the specimens were observed to
compare with thermal emissivity. Results showed that emissivity increased with oxidation, and the 10% oxidized NBG-18
showed the highest emissivity (0.890) which value is larger for 24% than the value of as-received specimen. Investigation of
factors affecting the emissivity revealed that increases in the surface roughness and porosity due to oxidation were responsible
for the increase in emissivity after oxidation.
영어 초록
Thermal emissivity of commercial nuclear graphites (IG-110, PCEA, IG-430 and NBG-18) following changes in oxidationdegrees were examined. Specimens were oxidized to 0%, 5%, and 10% in air flow of 5l/min at 600oC using a furnace, and thethermal emissivities were measured using an infrared spectrum analyzer. The measuring temperatures for the thermalemissivity were 100oC, 200oC, 300oC, 400oC and 500oC. Also density and porosity of the specimens were observed tocompare with thermal emissivity. Results showed that emissivity increased with oxidation, and the 10% oxidized NBG-18showed the highest emissivity (0.890) which value is larger for 24% than the value of as-received specimen. Investigation offactors affecting the emissivity revealed that increases in the surface roughness and porosity due to oxidation were responsiblefor the increase in emissivity after oxidation.참고 자료
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