W–1wt% Sm 2 O 3 powders doped with highly uniform Sm 2 O 3 were successfully synthesized by a novel wet chemical method followed by hydrogen reduction. The powders were consolidated by spark plasma sintering (SPS) at 1800°C to suppress grain growth during sintering. The FE-SEM and HRTEM analysis, tensile test and thermal conductivity measurements were used to characterize these samples. The grain size, relative density of the bulk samples fabricated by SPS sintering were 4μm and 97.8%, respectively. The tensile strength values of Sm 2 O 3 /W samples were higher than those of pure W samples. As the temperature rises from 25 to 800°C, the thermal conductivity of pure W and W–1wt% Sm 2 O 3 composites decreased with the same trend and the thermal conductivity of both samples was above 160W/mK at room temperature.