各向异性密集非球形微粒复合体的有效介电特性和渗流转变

EFFECTIVE PERMITTIVITY OF ANISOTROPIC COMPOSITE MATERIAL OF DENSE NON-SPHERICAL PARTICLES AND CONDUCTIVIY TRANSITION

利用随机介质的强起伏理论，引进辅助介电常数，讨论了各向异性强起伏随机介质的有效介电常数，并将之应用于密集非球形微粒复合体材料有效介电常数的计算．数值地给出了金属微粒绝缘媒质复合体材料的有效电导率与微粒密度、微粒形状及频率之间定量的函数关系．结果表明，非球形微粒复合体有各向异性的有效电导率和不同的渗流转变．

By using the strong fluctuation theory and introducing an auxiliary permittivity, the effective permittivity can be derived, and is applied to the calculation of effective conductivity of composite material embedded by dense conducting and non-spherical particles. Numerical results for the functional dependence on fractional volume, correlation length, and frequency are presented.It can be seen that the composited material embedded by dense conducting and non-spherical particles has anisotropic effective conductivity and different conductivity transfer.