NdFeB magnet characteristics

- Jan 10, 2018 -

"NdFeB magnets" is the "neodymium iron boron magnets," the wrong wording

Rare earth permanent magnet material Rare earth permanent magnet material is the samarium, neodymium mixed rare earth metals and transition metals (such as cobalt, iron, etc.) consisting of alloy, powder metallurgy method using pressure sintering, magnetic field obtained after a magnetic material .

Rare earth permanent magnet SmCo permanent magnet and NdFeB permanent magnet, wherein the magnetic energy product of the SmCo magnet is between 15-30MGOe, the magnetic energy product of the NdFeB permanent magnet is between 27-50 MGOe, Known as the "permanent magnet king", is currently the highest magnetic permanent magnet material. Samarium cobalt permanent magnets, despite their excellent magnetic properties, contain rare earth rare earth samarium and expensive scarce strategic metal cobalt, therefore, their development has been severely limited. The development of China's rare earth permanent magnet industry began in the late 1960s, when the leading product was samarium-cobalt permanent magnet, the current samarium-cobalt permanent magnet world sales of 630 tons, our country is 90.5 tons (SmCo magnetic powder), mainly for military technology. With the development of computer, communication and other industries, rare earth permanent magnets, especially NdFeB permanent magnet industry, have been developed rapidly. Rare earth permanent magnet material is now known as the highest performance of a permanent magnet material, magnetic properties than the magnetism used in the 19th century more than 100 times higher than ferrite, Alnico performance is much better than The expensive platinum cobalt alloy also doubled its magnetic properties. As the use of rare earth permanent magnetic materials, not only to promote the development of miniaturized permanent magnet devices to improve product performance, but also to promote the production of some special devices, rare earth permanent magnet material appears, immediately attracted great attention of all countries, The development is extremely rapid. The performance of various rare earth permanent magnetic materials developed and produced in China has approached or reached the international advanced level. Now rare earth permanent magnet material has become an important material in the electronic technology communication, used in satellites, radar and other aspects of the traveling wave tube, circulator and micro-motors, micro-recorders, aeronautical instruments, electronic watches, seismometers and other electronic Instrument. The current rare earth permanent magnet applications have infiltrated the automotive, household appliances, electronic instruments, MRI machines, audio equipment, micro motor, mobile phones and so on. In the medical field, the use of rare earth permanent magnet materials for "magnetic therapy", making the treatment greatly improved, thus contributing to the "magnetic therapy" rapid promotion. In all fields of application of rare earth, rare earth permanent magnet material is the fastest growing one. It not only brings great impetus to the development of rare earth industry, but also has quite far-reaching impact on many related industries.