A striking feature of boron carbide ceramics are very hard, its microhardness is about 50000 mpa (gpa) of 50, second only to diamond and CBN (90 ~ 100 gpa) (80 ~ 90 gpa), its diamond grinding efficiency can reach 60% ~ 70%, and 1 times that of SiC, 1 ~ 2 times that of corundum grinding ability, it can good acid-proof alkaline, small thermal expansion coefficient (4.5 x 10 ℃), so it has good thermal stability, can absorb thermal, but shock resistance is poor, brittle.

Boron carbide is resistant to air corrosion at 1000 ° C, but at higher temperatures it oxidizes readily in an oxidizing atmosphere.Boron carbide has high resistance to acidity and alkalinity, is resistant to wetting by most molten metals, and is fairly stable in contact with these substances.

Boron carbide powder can be directly used to grind gemstones, bearings, etc.Boron carbide ceramics can be used as abrasives, cutting tools, nozzles, bearings, axles, etc.Using its good thermal conductivity, low coefficient of thermal expansion, can absorb thermal neutron characteristics, can make high temperature heat exchanger, nuclear reactor control agent.It can be used to make chemical vessels, melting metal crucible and so on.