A Study of Thermal Conductivity Measurement of Thermal Interface Sheet Using Infrared Thermography

Thermal design requires highly accurate measurements of thermal properties such as thermal conductivity. ASTM E1530 and D5470 require measurements of different thickness samples of the same material to measure thermal conductivity without the influence of contact thermal resistance. We have proposed a method to measure thermal conductivity from a single sample without the influence of contact thermal resistance. It has been confirmed that the proposed method is equivalent to the conventional method for homogeneous solid samples, but it has not been confirmed that the method can be applied to soft materials and composite materials. In this study, we confirmed that the proposed method can be applied to a soft composite material, a heat dissipating sheet.