As an important mechanical basic component, ceramic bearings lead the world of new materials due to their excellent properties that metal bearings cannot match, such as high temperature resistance and super strength. In the past ten years, it has been increasingly widely used in various fields of the national economy and people's livelihood. First, since ceramics are almost not afraid of corrosion, ceramic rolling bearings are suitable for operating in harsh conditions filled with corrosive media. Second, since the density of ceramic rolling balls is lower than that of steel and the weight is much lighter, the centrifugal effect on the outer ring during rotation can be reduced by 40%, thereby greatly extending the service life. Third, ceramics are less affected by thermal expansion and contraction than steel. Therefore, when the bearing clearance is constant, the bearings can be allowed to work in environments with drastic temperature changes. Fourth, since the elastic modulus of ceramics is higher than that of steel, it is not easily deformed when subjected to force, so it is conducive to increasing the working speed and achieving higher precision. Ceramic bearings have the characteristics of high temperature resistance, cold resistance, wear resistance, corrosion resistance, antimagnetic electrical insulation, oil-free self-lubrication, and high speed. It can be used in extremely harsh environments and special working conditions, and can be widely used in aviation, aerospace, navigation, petroleum, chemical industry, automobiles, electronic equipment, metallurgy, electric power, textiles, pumps, medical equipment, scientific research and national defense and military fields. High-tech products using new materials. The rings and rolling elements of ceramic bearings are made of all-ceramic materials, including zirconium oxide (ZrO2), silicon nitride (Si3N4), and silicon carbide (Sic). The retainer is made of polytetrafluoroethylene, nylon 66, polyetherimide, zirconium oxide, silicon nitride, stainless steel or special aviation aluminum, thereby expanding the application range of ceramic bearings.
