CAJ | 학술논문

研究孔隙率、晶体结构及石墨含量对5种工业阴极材料室温导电性的影响规律。采用标准四探针法测定材料电导率，通过流体静力学法和XRD分析材料孔隙和晶体结构。结果表明：阴极室温电导率(σ)取决于其比电导率(σ0)和孔隙率(ε)，三者之间的关系可用基于逾渗理论的指数关系模型进行准近似描述。σ0大小与孔隙无关，仅取决于材料的微晶尺寸和层间距，故可反映材料本征导电性；指数n与阴极骨料材质有关，但对所研究的5种阴极，可近似取平均值4.65。此外，石墨质阴极的比电导率(σ0)可由混合物简单定则，根据其人造石墨含量计算而得。
연구공극솔、정체결구급석묵함량대5충공업음겁재료실온도전성적영향규률。채용표준사탐침법측정재료전도솔，통과류체정역학법화XRD분석재료공극화정체결구。결과표명：음겁실온전도솔(σ)취결우기비전도솔(σ0)화공극솔(ε)，삼자지간적관계가용기우유삼이론적지수관계모형진행준근사묘술。σ0대소여공극무관，부취결우재료적미정척촌화층간거，고가반영재료본정도전성；지수n여음겁골료재질유관，단대소연구적5충음겁，가근사취평균치4.65。차외，석묵질음겁적비전도솔(σ0)가유혼합물간단정칙，근거기인조석묵함량계산이득。
The ambient electrical conductivity (AEC) of carbon cathode materials was investigated in respect to their open porosity, crystal structure and graphite content using hydrostatic method, four-probe technique and X-ray diffraction (XRD), respectively. The AEC is proportional to the specific conductivity (σ0) and the exponential of (1?ε) (ε is porosity) by a quasi-uniform formula based on the percolation theory. Theσ0 can reflect the intrinsic conductivity of the carbon cathodes free of pores, and it depends on the mean crystallite size parallel to the layer (002). The exponentn is dependent on the materials nature of the cathode aggregates, while an averaged value, 4.65, can practically work well with 5 types of cathode materials. The calculation ofσ0 can be extended to the graphitic cathodes containing different aggregates using the simple rule of mixture.