Silicon carbide (SiC), silicon nitride (Si3N4) and zirconia (ZrO2) bearing materials have the characteristics of high temperature resistance, cold resistance, wear resistance, corrosion resistance, magnetoelectric insulation, oil-free self-lubrication and high speed. As an important mechanical basic component, ceramic bearing takes the lead in the new material world due to its excellent performance that metal bearing can't match. In the past ten years, it has been increasingly widely used in various fields of the national economy and people's livelihood.
