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Zirconia ceramic ball is a precision ceramic sintered at high temperature in a non-oxidizing atmosphere, with high strength, high wear resistance, high temperature resistance, corrosion resistance, acid, alkali resistance, can be used in seawater for a long time, and has a good electric and magnetic performance. At 800 ° C, the strength and hardness are almost unchanged, the density is low, almost 1/3 of the weight of the bearing steel, and the centrifugal force is small when rotating. Can achieve high speed operation. It also has self-lubricating properties, and it can be used in environments with high pollution without lubricating media. Become the preferred material for ceramic bearings and mixed ceramic ball bearings.
Ceramics used as bearing materials have silicon nitride and zirconia, both materials have high hardness, high temperature resistance, no rust excellent performance, but if you want to distinguish carefully, they are still different. The hardness of silicon nitride is higher, and the hardness means that the brittleness is greater, so it is not as good as zirconia in impact resistance, and zirconia beads have similar expansion characteristics to steel balls, and when the size of the beads changes inside the bearing, there will be a risk of problems, so this is one of the more tangled problems of ceramic bearing manufacturers.
