Abstract

The results of a numerical calculation for the known experimentally determined temperature dependence of the electrical resistivity of artificial graphite based on isotropic coke, which was performed with consideration for the shape and electrical connection of lamellar crystals in a polycrystal, are reported. A chain model, in which graphite flakes were represented as unimodal lamellar crystals having electrical contacts with each other, was used for the calculations. According to this model, the streamlines run not only parallel but also perpendicular to the graphite plane. To estimate the microstructure parameters of the artificial graphite, we used the position of a minimum in the experimental temperature dependence of the electrical resistivity. Conversely, the influence of chain model parameters, including the anisometry and anisotropy of the conductivity of the flakes, the cross-section of contact spots, and their location on the surface of the flakes, on the calculated electrical resistivity of artificial graphite was estimated.

中文翻译：

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基于各向同性焦炭的人造石墨电阻率温度依赖性模拟

摘要

报告了已知的实验确定的基于各向同性焦炭的人造石墨的电阻率的温度依赖性的数值计算结果，该数值计算是在考虑多晶中层状晶体的形状和电连接的情况下进行的。链模型，其中石墨薄片被表示为具有彼此电接触的单峰层状晶体，用于计算。根据这个模型，流线不仅平行而且垂直于石墨平面。为了估计人造石墨的微观结构参数，我们在电阻率的实验温度依赖性中使用了最小值的位置。相反，链模型参数的影响，