1, low density: because of the low density of ceramic rolling material, the centrifugal load is small, so that it can work at higher speed, and generate less heat.

2. Medium elastic modulus: the elastic modulus of ceramic rolling body is higher than that of steel rolling body, so the dynamic stiffness of bearing is improved, but the elastic modulus is too large, which will reduce the bearing capacity due to stress concentration.

3, the coefficient of thermal expansion is small: the coefficient of thermal expansion is small, which helps to reduce the sensitivity to temperature changes, so as to prevent stuck. For mixed roller bearings, the applicable running speed range is wider.

4, high compressive strength: high compressive strength is the need for rolling bearings to bear high contact stress (for ceramic materials, their strength is usually determined by the fracture modulus measured by three-point or four-point bending test).

5, high hardness and high toughness: the combination of these two characteristics can obtain better surface roughness, and can prevent the outside hard particles and impact damage.

6, good anti-rolling contact fatigue characteristics: this performance is very important to the requirements of bearing rolling body.

7, peeling failure form: if the rolling body fails in the work, it should be fatigue peeling, the effective form in the card before the death of the omen, is a kind of effective form causing the least harm. Ceramic materials also have some special properties in some application fields with high application conditions.

8, high temperature resistance and stability: up to 800℃ high temperature environment can stably maintain its mechanical properties.

9, corrosion resistance: in the oxidation and corrosion environment, especially in the repeated rolling and extrusion surface oil film contact area should have oxidation resistance and corrosion stability.