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本文通过考察电阻率与Ｖ２Ｏ３体积分数的关系。研究了Ｖ２Ｏ３／聚合物复合材料的导电特征。采用ＧＥＭ方程对实验数据进行计算机拟合，结合电镜照片详细地分析了拟合参数Φｃ，ｔ及ＬΦ，Ｌｆ的物理含义。研究发现，随着填料粒径、基体种类和复合方式的不同，临界体积分数Φｃ便不同，ＧＥＭ方程能够准确地描述该复合材料电阻率与Ｖ２Ｏ３体积分数的关系，其中参数ＬΦ，和Ｌｆ具有非常特定的物理意义，它们分别由导电填料（Ｖ２Ｏ３）和聚合物基体的几何特征、取向状态和配置方式决定，而Φｃ、ｔ则是导电填料和基体互相作用的综合反映。
This article examines the relationship between the resistivity and the V2O3 volume fraction. The conductive characteristics of V2O3 / polymer composites were studied. The experimental data were fitted by the GEM equation and the physical meanings of fitting parameters Φc, t, LΦ and Lf were analyzed in detail by electron micrographs. It is found that the critical volume fraction Φc is different with the particle size, matrix type and compounding method. The GEM equation can accurately describe the relationship between the resistivity of the composite and the volume fraction of V2O3, in which the parameters LΦ and Lf are very different Specific physical meaning, which are determined by the geometric characteristics of the conductive filler (V2O3) and the polymer matrix, orientation and configuration, and Φc, t is a comprehensive reflection of the interaction between the conductive filler and the matrix.