Thermal conduction in novel isotropic conductive adhesive

Thermal transport in silver-coated polymer sphere composites by the bidirectional 3ω method

“…However, this effect alone can not explain the large discrepancies observed between the transient and steady state methods. Kristiansen et al 21 pointed out that the large discrepancy in the values reported by SS method occur for 45 and 50AgPS, which is above the percolation threshold. The increased thermal conductivity measured by SS method could be due to the fixed bond line thickness (BLT) between the reference bodies during curing of the AgPS-ICA sample, which exerts a contact pressure on the sample due to thermal expansion.…”

“…Also shown in Fig. 4 are thermal conductivity measurements of the same AgPS-ICA from Kristiansen et al 21 by the SS method and the LF method. In the SS method, the sample is cured at different thicknesses between two Cu rods, and measuring the thermal conductivity as κ = Q/∇T , where Q is the heat flow through the sample and ∇T is the temperature gradient across the sample.…”

“…FIG. 4: Thermal conductivity of AgPS-ICAs for varying volume fractions of AgPS measured by 3ω, SS 21 and LF 22 methods. The 3ω and LF measurements were done at room temperature, whereas the SS measurements were done at 40°C.…”

“…This material system, hereafter referred to as AgPS-ICA, has a large advantage over the conventional ICAs due to the significant reduction in costly silver. AgPS-ICAs have yielded thermal conductivities similar to the conventional ICAs at Ag filler fractions of around 3 vol.% measured using both steady state (SS) and LF techniques 21,22 . For both methods, a clear correlation was observed between AgPS volume fraction and thermal conductivity.…”