Electrical Resistivity of a Composite of Conducting Particles in an Insulating Matrix

Abstract

A model rationalizing the curve of resistivity vs volume percent of a metal-powder component in a metal/polymer composite is considered. It shows the conductivity to be directly dependent on the surface area of the conducting particles and also shows a 2/3 power dependence on their volume. Comparison with experimental results shows a good fit.

Biodegradable Materials for Multilayer Transient Printed Circuit Boards

“…[ 29,30 ] As cast, the Na-CMC fi lms have a surface roughness of Figure S3a). The conductivities, likely due to tunneling between adjacent particles, [ 31,32 ] are comparable to those of commercial silver epoxies (5000 S/m). [ 33,34 ] The high conductivity of the W2 paste may arise, at least partly, from the polyhedral shapes of the W2 particles and the associated increased probabilities for physical contact over large areas (Figure 2 e) between particles.…”

Carbon black filled conducting polymers and polymer blends

“…They only have a proportional relationship. The concept of average number of contacts between filler particles was developed by Aharoni 1 and Janzen. 55 Aharoni 1 considered that percolation occurred when the contact number increased from one to two.…”

Large magnetoresistances and non-Ohmic conductivity in EuWO1+xN2−x

“…For example, a composite of silver-coated glass spheres showed an I = AV n variation with 1 Ͻ n Ͻ 2, 6 and other models have been suggested for metal/ semiconductor composite networks. [7][8][9] Nonlinear conductivity was also observed in charge ordered manganite perovskites, and may be linked to the melting of charge order and creation of conducting filaments above a certain threshold current. [10][11][12] This is qualitatively different to our findings where the nonlinear conduction occurs predominantly at low currents and appears to be intrinsically linked to the ferromagnetic ordering.…”