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Etude de noirs de carbone par resonance paramagnetique electronique

✍ Scribed by Alphonse Charlier; Pierre Taglang; Jean-Baptiste Donnet; Jacques Lahaye; Jean Metzger; Eugene Papirer

Publisher
Elsevier Science
Year
1965
Tongue
English
Weight
858 KB
Volume
3
Category
Article
ISSN
0008-6223

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✦ Synopsis

The spin resonance of H.A.F. and M.P.C. carbon blacks oxidized by ozone or nitric acid has been studied by means of a 9 kMc/s EPR spectrometer. The oxidation treatments create new paramagnetic centers in addition to those already present in these carbon blacks. Since the corresponding spin absorption us increases with oxidation time one can conclude that the oxidizer (oxygen, or O,, or HNO,) is responsible for the creation of these new spin centers. The thermal variation of x2 obeys the Curie-Weiss law with a Curie temperature 0 = 60°K independent of the oxidation time and of the type of oxidation process,

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