Ceramic bearings are composed of ionic bonds and co-built parts, which can provide better performance than metal bearings. They usually have high hardness, elasticity, lightness, and excellent and special electrical, optical, magnetic, piezoelectric, thermoelectric and other functional characteristics, and are widely used in mechanical and chemical engineering, biomedical, electronic and electrical, new energy, nuclear power, aerospace, national defense and military industry and other fields,
Ceramic bearing
Ceramic bearings can be subdivided into two types: all-ceramic bearings and hybrid ceramic bearings. Common ceramic materials in bearings include silicon nitride, alumina, zirconia and silicon carbide.
Hybrid ceramic bearings are generally composed of rings made of bearing steel and bearing-grade silicon nitride rolling elements, which have electrical insulation characteristics. It has the characteristics of preventing current corrosion, effectively improving rotating speed, long service life, high hardness and toughness, higher bearing stiffness, and lower sensitivity to temperature changes;
The races and balls of all ceramic bearings are made of ceramic materials. Compared with mixed bearing materials, the machining of all ceramic bearings is more difficult. All ceramic bearings are divided into those with and without retainers. All ceramic bearings without retainers can continue to operate at extremely high temperatures. All ceramic bearings have high corrosion resistance and can withstand most common acids. They will not corrode when exposed to water or salt water. The application fields include nuclear magnetic resonance equipment, high vacuum environment, semiconductor manufacturing, radiotherapy and other applications requiring corrosion resistance, non-conductivity or non-magnetism.
In summary:
Advantages: It can be used in high temperature, insulation, corrosion resistance and non-lubricating occasions.
Disadvantages: difficult processing and high cost.