precision silicon nitride Si3N4 ceramic bearing sleeve bush 

precision tolerance silicon nitride Si3N4 ceramic bearing sleeve bush Reputation depends on quality,  quality comes from Hard! Silicon Nitride Ceramic: Ceramic materials are not easy to oxidize at high temperatures and have good corrosion resistance to acids, alkalis and salts. Ceramic materials also have unique optical properties and can be used as solid-state laser materials, optical fiber materials, optical storage, etc., and transparent ceramics can be used in high-pressure sodium lamps. Magnetic ceramics (ferrites such as MgFe2O4, CuFe2O4, Fe3O4) have a broad future in the application of audio tapes, records, transformer cores, and large computer memory components. The basic ways of heat exchange are: conduction, convection and radiation. In order to effectively dissipate heat, people often achieve this by reducing the thermal resistance of the heat flow path and enhancing the convection coefficient, often neglecting heat radiation. LED lamps generally use n…