In order to understand and to be able to affect the efficiency of electrical conduction in particle-filled conductive adhesives, the mechanism of interparticle conduction is modeled theoretically and assessed experimentally. We predict and show that the electrical resistance of powders is dependent on the external pressure applied on them. A pressure-dependent model is developed to predict interparticle electric conduction by representing interparticle contact resistance as the sum of constriction resistance and tunneling resistance. The theoretical model developed is confirmed experimentally using 9-μm diameter spherical nickel particles under pressure.
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Sancaktar et al. (1996) studied this question.
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