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Journal of the Korean Ceramic Society 1999;36(5): 555. |
| 인산 에스테르에 의한 탄소재료의 내산화 증진 효과 |
| 김경자, 조광연, 박윤창1, 김태관1, 정윤중2, 임연수2 |
국립기술품질원 요업기술원 탄소재료실
1성균관대학교 화학과
2명지대학교 무기재료공학과 |
| Improvement of Oxidation-resistance of Graphite by Phosphate |
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| ABSTRACT |
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Impregnation of phosphorous additiers into graphite bulk was studied with the goal of enhancing the effectiveness of oxidationprotection. In addition graphite acid washing was carried out prior to the impregnation further to improve oxidation resistance. Observation of the oxidation rate for raw graphite(Raw) impregnated graphite with tri-butyl phsophate on raw block(RP) and impregnated graphite on acid-treated graphite(AP) in air are reported. The phsophorus residue adsorbed on the graphite surface at active sites was determined by FTIR, XRS, TGA techniques. AP with tri-butyl phosphate was found to result in both 30% reduction in oxidation rate at 1000$^{circ}C$ compared to Raw and increase of 120$^{circ}C$ in oxidation temperature From the samples of oxidation rate of each specimen in Arrhenius plot it can be said that the present oxidation resistance origninates from the change of chemical reaction modesw neigther by acid-washing treatment nor phsophate impregnation |
| Key words:
Oxidation resistance, Acid-wasing, Phosphate ester |
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