合成温度与时间对氟化石墨性能的影响研究

INFLUENCE OF SYNTHESIS TEMPERATURE AND TIME ON THE GRAPHITE FLUORIDES PROPERTIES

电解ＫＦ·２ＨＦ电解液制取氟气，并将其经二级净化设施纯化后，再与鳞片石墨粉（含炭＞９９％，粒度＜４０μｍ）在高温下直接进行反应，制得氟化石墨。在本工艺条件下，保持温度５００℃，经１５小时合成反应所制备的氟化石墨经红外光谱测试分析，在波数１２１９ｃｍ－１处的吸收谱带强度最大，且其真密度、电阻率、含氟量和Ｆ／Ｃ值最高。

Fluorine gas was prepared by electrolysis of the electrolyte KF·2HF, then the graphite fluoride was synthesized through a direct reaction between the scaly graphite powder (carbon content >99%, grain size<40μm) and the fluorine gas purified by two self making purgers at high temperature. Under our experiment conditions, the graphite fluoride which was synthesized at 500℃ for 15 hours had a strong absorption peak of F—C covalent bond near the wavenumber 1219cm 1 of FTIR spectrum. Besides, its real density,electrical resistivity,fluorine content and F/C ratio had the best values.