Full ceramic bearing means that the rolling elements and inner and outer rings are made of ceramic materials. Compared with steel bearings, full ceramic bearings are more resistant to corrosion, high temperature, wear resistance and high rigidity. In the aerospace industry, ceramic rolling bearings have extremely good high-speed performance. In high temperature environments, full ceramic bearings can work reliably at 800-1000°C; in corrosive media, full ceramic bearings can show their unique advantages. Various acid-resistant pumps, vacuum pumps, and centrifugal pumps used in the chemical industry Both pumps and turbomolecular systems have applied full ceramic bearings.