窒化ホウ素を用いたポリマー系複合材料の熱伝導率の向上のための微視構造設計

抄録

Polymer composites with high thermal conductivity offer new possibilities for thermal management in electric systems. The objective of this paper is to study the microstructural design for improvement of thermal conductivity of polymer composites with boron nitride (BN) and spherical particulate fillers (SP). Representative volume element (RVE) models of micro fillers were generated, and finite element analysis was performed to evaluate thermal conductivity of polymer composites by using Digimat-FE. The effect of volume fraction, aspect ratio and thermal conductivity of BN on the predicted thermal conductivity of BN/epoxy composites was discussed. In addition, experimental measurements of the thermal conductivity of the manufactured polymer composites with BN and SP were carried out by using a steady-state method. The results showed that thermal conductivity of epoxy composites with 10vol%BN and 20vol%SP and thermal conductivity of epoxy composites with 20vol%BN are nearly identical.