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China's rare earth permanent magnet motor development and huge industrial capacity
Mar 26, 2018

NdFeB magnets are the magnets that have been found to have the highest commercial performance and are known as magnetic kings. Its chemical formula is Nd2Fe14B, which is an artificial permanent magnet. It has so far had the strongest magnetic permanent magnet.


NdFeB magnets can be classified into bonded NdFeB and sintered NdFeB. Bonding is actually injection molding, and sintering is vacuuming through high temperature heating molding!

 

NdFeB magnets as the third generation of rare earth permanent magnet materials have high performance. They are widely used in energy, transportation, machinery, medical, IT, home appliances and other industries, especially the development of knowledge economy represented by information technology. The use of functional materials such as rare earth permanent magnets, NdFeB, and other industries will continue to bring new applications, which will bring a broader market perspective to the NdFeB industry.


The neodymium-iron-boron magnet is a tetragonal crystal formed of neodymium, iron, and boron. In 1982, Sagawa Kawamoto of Sumitomo Specialty Metals discovered a neodymium magnet. This magnet has a larger magnetic energy product than samarium-cobalt magnets and is the world's largest energy product at that time. Later, Sumitomo Special Metals developed a successful powder metallurgy method, and General Motors Corporation developed a successful spin-blowing smelting method that can produce neodymium-iron-boron magnets. This magnet is the most powerful permanent magnet in today's world and is the most commonly used rare earth magnet.


Its hard texture, stable performance, and good price/performance ratio make it extremely versatile. However, because of its strong chemical activity, the surface coating must be treated. In everyday electronic products, such as hard disks, mobile phones, and headphones, neodymium magnets are present.


As one of the most important application fields of rare earth materials, NdFeB material is one of the important basic materials supporting the modern electronic information industry and is closely related to people's lives. With the popularization of communication equipment such as computers, mobile phones and automobile telephones and the rapid development of energy-saving automobiles, the world's demand for high-performance rare earth permanent magnet materials has grown rapidly. Neodymium magnets are indispensable as the "heart" of permanent magnet frequency air compressors. In the first decade of this century, China has completed the transition from a permanent magnet producing country to a highly efficient motor producing country. The rare earth permanent magnet motors produced in China are equipped with a large number of air compressors and have begun to export to European and American markets. China's rare earth permanent magnet motor development and huge industrial capacity, leading the trend of the world's variable frequency air compressor.