Silicon nitride ceramic balls are precision ceramics sintered at high temperature in non-oxidizing atmosphere. They have high strength, high abrasion resistance, high temperature resistance, corrosion resistance, acid resistance, alkali resistance and can be used in seawater for a long time. At 800 ℃, the strength and hardness is almost the same, its density is 3.20 g/cm3, is almost 1/3 of the bearing steel. Weight, rotating centrifugal force small. Can realize high-speed operation.
It also has self-lubricating property, which can be used in highly polluted environment without lubricating medium. Become the preferred material for ceramic bearing and mixed ceramic ball bearing. Zirconium oxide ceramic ball has high strength and toughness, good abrasion resistance, high temperature corrosion resistance, high rigidity, non-magnetic permeability and electric insulation at room temperature. Zirconia ceramics ball at 600 ℃, strength and hardness is almost the same its density of 6.00 g/cm3, close to the metal thermal expansion rate if the inflation rate, can be used with metal joint.