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A notable feature of boron carbide ceramics is that it is very hard. Its microhardness is about 50000MPa (50GPa), second only to diamond (90~100GPa) and CBN (80~90GPa), and its grinding efficiency can reach 60% of diamond ~ 70%, 1 times that of SiC, 1~2 times that of corundum, it has good acid and alkali resistance and small thermal expansion coefficient (4.5x 10-6??C), so it has good thermal stability, but Poor impact resistance and high brittleness.

Utilizing its high hardness, boron carbide ceramics can be used as abrasives, cutting tools, wear-resistant parts nozzles, bearings, axles, etc. Utilizing its good thermal conductivity, low thermal expansion coefficient, and ability to absorb thermal neutrons, it can be used to manufacture high-temperature heat exchangers and control agents . Utilizing its good acid and alkali resistance, it can be used to make chemical utensils, molten metal crucibles, etc.