Ceramic bearings have the characteristics of high temperature resistance, cold resistance, wear resistance, corrosion resistance, anti-magnetic electrical insulation, oil-free self-lubrication, high speed, etc., and they can be used in extremely harsh environments and special working conditions.They are high-tech products of new materials,which are widely used in aviation, aerospace, nautical, petroleum, chemical industry, automobile, electronic equipment, metallurgy, power textile, pumps, medical equipment, scientific research and national defense and military fields.