Influence of Filler Morphology on Electrical Conductivity Variations of Stretchable Wires Printed with Electrically Conductive Pates

Abstract

Variation in electrical resistivity of stretchable wires printed with electrically conductive pastes containing silver flakes or silver particles was examined during uniaxial cyclic tensile tests. Viscoelastic deformation of the specimens can contribute to suppress increase in electrical resistivity of the wires during loading. Electrical resistivity of the wires significantly increased during unloading not only during loading. This increase in electrical resistivity during unloading is believed to occur related to Mullins effect. Electrical resistivity significantly increases during unloading when the silver micro-particles are used as fillers dispersed in the wires although increase in resistivity can be suppressed during first loading step. Mechanical behavior of the wires that depend on filler morphology plays an important role in determining electrical resistivity variations during the cyclic tensions.