Abstract: Fluorine gas was produced with the electrolysis of the molten salt KF·2HF, then graphite fluoride was prepared
through the reaction between graphite powder and fluorine gas at 500℃. The real density of the graphite fluoride was 2.53g/cm^3, its electrical resistivity 3.1×10³Ω·cm
and its colour greyish white. The graphite fluoride synthesized had a absorption peak of infrared reflection spectra on F--C covalent bond at approximation wavenumber
1219cm^-1 and 1350cm^-1. By testing friction factor for the graphite fluoride, graphite powder and molybdenum disulphide, the experimental results showed that the friction
factor of the graphite fluoride was the smollest. Furthermore, technological conditions and special properties of the graphite fluoride were dissussed.

Key words: preparation of fluorine gas, graphite fluoride, friction properties