| 초록 |
Thermally conductive BN/SiC binary filler and epoxy composite materials were fabricated via magnetic alignment. Owing to its anisotropy, the vertically aligned BN composite had a high thermal conductivity and generated a vertical heat flow path. When the SiC nanoparticles were added to the binary filler, they hindered BN-particle aggregation and led to the formation of a three-dimensional heat conduction path. The maximum thermal conductivity (5.77 W/mK) was obtained with an addition of SiC filler, and was 3.08-fold and 1.1-fold higher than that of randomly mixed BN and vertically aligned BN composites, respectively. The additional SiC-Fe3O4 particles resulted in significant aggregation of the filler, which in turn led to a decrease in the thermal conductivity. The measured storage modulus of the BN-Fe3O4/SiC binary filler composite was also higher than those of the BN-Fe3O4 and BN-Fe3O4/SiC-Fe3O4 composites, owing to the aggregation of particles. |
