The effect of dichlorodifluoromethane, CClsFs and chlorotrifluoromethane, CClFs, on the air oxidation of nuclear graphite was studied by the continuous measurement of weight loss. One-half volume per cent CCl,Fs in air reduced the rate of oxidation of CSF and TSGBF nuclear graphites to about one-thi
The effect of trace elements on the surface oxidation of H-451 graphite
β Scribed by O.C. Kopp; E.L. Fuller Jr.; A.D. Surrett
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 901 KB
- Volume
- 207
- Category
- Article
- ISSN
- 0022-3115
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The effect of group IIIA-VIA elements and oxides on graphite oxidation was determined. Additives were moulded with spectroscopically pure graphite powder. The concentration was maintained constant at 0.1 mole per cent based on the element. The rate of reaction with 1 atm of air was measured at 700 a
fraction of the surface of some graphitized carbons are energetically heterogeneous. That part of the surface which is heterogeneous has sites for which N, shows a higher isosteric heat of adsorption at 78Β°K than the uniform portion constituting the major fraction of surface and for which the heat o
adsorption de l'eau entre des degres hygrometriques allant de 0 a loo%, (2) en dosant l'eau extraite par un courant de gaz inerte set balayant le graphite port& a des temperatures croissantes (allant jusqu'a 900Β°C) nous avons mesure la quantite d'eau pouvant etre d&orb&es du graphite a chaque temper