Fig. 3.

Thermal performance of the polymer/s-BN composite film. a Thermal conductivity vs. BN content. b Comparison of the through-plane thermal conductivity and specific thermal conductivity (STC, = TC/filler loading (%)) of the polymer/s-BN composite film with those of different composite materials. The polymer/s-BN composite film presents more than twice the reported maximum for BN-based composites. Thermal conductivity with different ratios of BNNCs and h-BN c and different fillers d