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膨胀石墨(EG)质轻,易于成型,过渡金属氯化物石墨层间化合物具有良好导电性,因此,以膨胀石墨为宿主制备的石墨层间化合物(EGICs)有望作为高性能电磁屏蔽材料而获得应用。本文对CoCl2-FeCl3-膨胀石墨层间化合物的电导、电导与温度的关系以及其磁性能进行了探讨。结果表明,CoCl2-FeCl3-EGICs常温电导是膨胀石墨的2.8～4.2倍,阶结构不同电导率不同,Ⅱ阶电导率最高,为8.97×105S/m;300℃以内具有金属电导特性。CoCl2-FeCl3-EGICs磁化特性与EG不同,为顺磁性,磁化率为10-4量级,随阶数升高而下降。
EG is light and easy to form, and the transition metal chloride graphite intercalation compounds have good conductivity. Therefore, graphite intercalation compounds (EGICs) prepared from expanded graphite are expected to be used as high performance electromagnetic shielding materials . In this paper, CoCl2-FeCl3-intumescent graphite intercalation compound conductivity, conductance and temperature of the relationship between the magnetic properties were discussed. The results show that the conductivity at room temperature of CoCl2-FeCl3-EGICs is 2.8-4.2 times that of expanded graphite. The conductivity of different order structures is different. The conductivity of the second order is 8.97 × 105S / m and the metal conductivity is within 300 ℃. Magnetization characteristics of CoCl2-FeCl3-EGICs are different from those of EG and are paramagnetic. The magnetic susceptibility is about 10-4, which decreases with increasing order.