Fig. 5From: Enhanced thermal conductivity of waste sawdust-based composite phase change materials with expanded graphite for thermal energy storageSEM photographs of the a CPCMs-4 with 1% EG (×800), b CPCMs-4 with 3% EG (×800), c CPCMs-4 with 5% EG (×800), and d CPCMs-4 with 5% EG (×5.0k)Back to article page