Magnets that retain their magnetism after an external magnetic field is removed are called permanent magnets. There are some commonly used magnets: ferrite, neodymium iron boron permanent magnet, samarium cobalt. What are the main components of permanent magnets?
The main components of ferrite magnets: the main raw materials are BaFe12O19 and SrFe12O19. Ferrite magnets are made of ceramic technology. The texture is hard, the price is low, and the performance is moderate. It has become the most widely used permanent magnet.
The main components of NdFeB permanent magnets: permanent magnet materials based on the intermetallic compound Re2fe14b. The main components are rare earth elements, Fe, and N. Among them, the main rare earth element is Nd. In order to obtain different properties, rare earth metals such as Dy and Pr can be partially replaced by CO, Al, etc. The content of boron is very small, but in the formation of tetragonal intermetallic compounds Playing an important role, uniaxial anisotropy and high Curie temperature are discussed, giving the compound high saturation magnetization and high saturation magnetization. It is one of the highest performing magnets commercially known as a magneto and has extremely high magnetic properties. Its maximum magnetic energy product is more than 10 times higher than that of ferrite. Its processing performance is also quite good. The working temperature can reach up to 240℃. Moreover, it has a hard texture, stable performance and good cost performance, so it has been widely used.
The main components of samarium cobalt magnets: It is a magnet made of rare earth metal materials such as samarium and cobalt. Cobalt magnet is the second largest magnet developed in 1970. It has a high maximum magnetic energy product, high coercive force, and is fragile and easy to crack. It is the second largest magnetic material today.
