Figure 2

Microstructure of UO₂-GNP composite fuel pellets with different graphene loadings: 1 wt.% (a), 3 wt.% (b), and 5 wt.% (c) sintered by SPS at 1600 °C for 8 mins; the dependence of theoretical density (d); cross-plane thermal diffusivity (e) and thermal conductivity (f) as a function of GNP loadings.