二元无规混合系统的有效介质理论  

EFFECTIVE-MEDIUM THEORY FOR TWO-PHASE RANDOM COMPOSITE/SYSTEM

作　　者：马余强[1] 李振亚[1] 

机构地区：[1]苏州大学物理系,苏州215006

出　　处：《物理学报》1990年第3期457-463,共7页Acta Physica Sinica

摘　　要：本文从二元无规混合物的两种不同拓扑结构出发,在Maxwell-Garnett理论的基础上,提出一种自洽的方法以改进类平均场的Bruggeman有效介质理论。导出了二元无规混合物有效电导率的普适式,研究了一些实际材料的电导率和热导率问题,理论计算结果与实验数据符合甚好。In this paper, starting from the relation between two distinct topological structure, we propose a simple self-consistent method based on the Maxwell-Garnett theory, in order to improve the Bruggeman's effective medium theory (mean-field-type approximation). We derive a general expression for the effective conductivity of a two-phase random composite system. The theoretical results on electric and thermal conductivity for some real materials are in good agreement with experimental data.

关 键 词：介质 理论 二元 无规 混合物系统 

分 类 号：O361.2[理学—流体力学]