Dependence of the Conductivity on Geometry, Material and Process Condition

3 Dependence of the Conductivity on Geometry, Material and Process Condition 

The measured conductivity is not constant and changes considerably if the resistance is measured through the interior or over its thickness, thus including the surface. 

Furthermore, the electrical properties can be adjusted by varying the matrix polymer and the filler distribution. Since the material concept allows for the use of almost any polymer matrix, the required material properties, for instance a high temperature resistance, can be provided by the use of polyphenylene sulfide (PPS) as a matrix polymer. The morphological structure, and thus the measured conductivity over the thickness, depend on the ratio of the melt temperatures and viscosities of both the polymer and metal alloy, whereas the passage conductivity is at a similarly high level of 4x10 S/m. 

The latter shows very distinctive shear sections in the outer layers leading to conductivities over the thickness that are strongly dependent on the flow path. However, the viscosity itself has no significant influence on the distribution of the metal alloy. Freezing of the polymer at the same time or later than the metal alloy and a low viscosity of the material can considerably improve the level and homogeneity of conductivity. 

3 Before heating Z) During heating After heating 

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