The structural, thermal, electrical and mechanical properties of fully dense B₄C ceramics, sintered using Spark Plasma Sintering (SPS), were studied and compared to the properties of B₄C ceramics previously published in the literature. New results on B₄C’s mechanical responses were obtained by nanoindentation and ring-on-ring biaxial strength testing. The findings contribute to a more complete knowledge of the properties of B₄C ceramics, an important material in many industrial applications.