SOLID-PHASE SYNTHESIS GRAPHITE FLUORIDE

Under nitrogen atmospheric pressure 0.5MPa. the graphite fluoride was prepared through the synthesis reaction between the graphite powder (grain 40μm, carbon content99.7%)and the polytetrafluoroethylene at 450℃. The real density of the graphite fluoride was 2.50 Mg.m-1,its electrical resistivity 2.85kΩ.cm and its colour greyish white. The graphite fluoride synthesized had a absorb peak value of the infrared reflection spectra on F-C covalent bond at wavenumber 1219cm-1and 1350cm-1. The test results showed that the characteristics of the graphite fluoride in solid-phase process preparation consisted with those in gas-phase. The new technology had many advantages, such as simplicity, safety, lower-cost and no a strong poisonous fluorine gas as the main raw material.