| Conductive adhesives were made by adding micro-sized silver flakes, mixed-sized silver powders with the addition of 5% nano-sized silver and mixed-sized silver powders with the addition of 10% to the bisphenol F epoxy resin. By printing the conductive tap on glass substrate and caring, the length, width, thickness and resistance were measured. Then the volume resistivity could be calculated by the formula ρ=Rs/l. The results indicated that the addition of nano-sized silver powders to silver flakes usually increases its resistivity, only near the percolation threshold, the addition of nano-sized silver powders decreases the resistivity by helping to form the conductive path. When the increment of nano-silver powders was 5%, the volume resistivity decreased most significantly, the volume resistivity can reach 1.6×10-4 Ω.cm with the content of 75%. |
