Ceramic bearings and ceramic ball bearings are a peculiar branch of the bearing category, which is a good combination of new processes, new materials, and new structures. As the basic components for carrying mechanical rotation, they have been widely used in various special and harsh environments due to their excellent performance that metal bearings cannot match. They are leading the way in the world of new materials due to their high temperature resistance, low cold resistance, corrosion resistance, insulation, magnetic resistance, low density, strength, and other properties. In the past decade, it has been increasingly widely applied in various fields of national economy and people's livelihood. In the fields of aerospace, navigation, nuclear industry, petroleum, chemical industry, light textile industry, machinery, metallurgy, electricity, new energy, food, locomotives, subways, high-speed machine tools, and scientific research, national defense and military technology, it is necessary to work under special working conditions such as high temperature, high speed, deep cooling, flammability, explosiveness, strong corrosion, vacuum, electrical insulation, non-magnetic, dry friction, and easy rusting. The indispensable replacement role of ceramic bearings is gradually being recognized by people. With the continuous progress of processing technology and the increasing level of technology, the cost of ceramic bearings continues to decrease. They have gradually been promoted to various industrial sectors of the national economy, from being only applied in small areas of high, precision, and sharpness in the past. Batch production has gradually brought market prices closer to practicality, reaching a level acceptable to users. Through batch and long-term use tests in different industries, many successful cases have experienced the advantages of maintenance free, long life, high stability, and low cost brought by ceramic bearings and ceramic ball bearings. Ceramic bearings and ceramic balls have moved from the research and trial stage to the stage of mass production, and a wave of large-scale application has emerged.