Modification of Electrically Conductive Adhesives for Better Mechanical and Electrical Properties

摘要

The goal of the work has been to check a possibility of improvement of electrical properties of electrically conductive adhesives with isotropic electrical conductivity to edge these properties toward to properties of solders. The electrical resistance and nonlinearity of I-V characteristic have been investigated. Two ways have been used for electrically conductive adhesive modification: addition of small amount of silver nanoparticles (grains) of three different dimensions into adhesive, and substitution of a part of filler flakes with the same amount of nanoparticles. It has been found that addition of silver nanoparticles increases the resistance and nonlinearity of adhesive. It has also been found that adhesives modified with nanoparticles have lower sensitivity to combined climatic ageing in comparison with adhesives without nanoparticles. The reason is other quality of contacts between flakes and contacts between nanoparticles.