Reaction of Fluorine and Carbon and Properties of Their Compounds

Abstract

As the compounds which react with carbon and fluorine possess extremely low surface energies, the formation of the compound on the surface of carbon electrode would cause high overpotential and finally anode effect in fluorine or aluminum cell. Their compounds having the atomic ratio of C : F＝1 : 1 are white fine powders and have the properties of good water and oil repellency and lubrication. The present paper is concerned with the reactions of fluorine and six kinds of carbon materials and with the rate determining steps of their reactions. Their properties and structures were studied by means of thermogravimetric and differential thermal analysis, IR and NMR spectra, X-ray diffraction, and the measurements of specific gravity and surface area etc. From these results, there are new compounds containing fluorine atoms between the layers of carbon, where the fluorine atoms are strongly connected to the carbon atoms with covalent bonds, and are very stable to chemicals. Their decomposition temperatures depend upon carbon materials.