论文标题
具有各种渗透阈值的复合材料热电特性的有效培养基理论
Effective medium theory for the thermoelectric properties of composite materials with various percolation thresholds
论文作者
论文摘要
在工作中，构建了一种修改的有效培养基理论，用于计算具有不同渗透阈值值的热电复合材料的有效特性。结果表明，即使在关键区域以外的浓度下，阈值值也是确定有效特性至关重要的。考虑了该复合材料的一组局部特性的两种根本不同的情况。在其中一种情况下，其中一个阶段的电导率和导热率同时大于另一个阶段的电导率和导热率。第二阶段的电导率大于第二阶段的电导率，但是第一阶段的导热率小于第二阶段的导热率，显示出有效电导率的异常浓度行为，即随着井导电阶段的提高，有效的电导率显示出降低（而不是在标准情况下的增长），这是在超过生长的情况下。
In the work, a modified effective medium theory is constructed for calculating the effective properties of thermoelectric composites with different values of percolation thresholds. It is shown that even at concentrations beyond the critical region, the threshold value is essential for determining the effective properties. Two fundamentally different cases of a set of local properties of the composite are considered. In one of these cases, the conductivity and thermal conductivity of one of the phases is simultaneously greater than the conductivity and thermal conductivity of the other phase. The second, anomalous case, when the electrical conductivity of the first phase is greater than that of the second, but the thermal conductivity of the first phase is less than that of the second, shows unusual concentration behavior of effective conductivity, i.e. with an increase in the well-conducting phase, the effective conductivity shows a decrease (rather than growth as in the standard case), which at goes over to growth.
