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Magnet Session "Magnetic King"-Neodymium Magnet.

Apr. 11, 2020

As one of the most important application fields of rare earth materials, NdFeB material is one of the important basic materials supporting modern electronic information industry and is closely related to people's lives. With the popularization of communication equipment such as computers, mobile phones, car phones, and the rapid development of energy-saving vehicles, the world's demand for high-performance rare earth permanent magnet materials has grown rapidly. NdFeB magnets are currently found to have the highest commercial performance magnets and are known as magnetic kings.


As for the manufacture of neodymium magnets, as many reports have said, it is impossible to talk about leaving China. This is because most of the Dy (dysprosium) mixed in the magnet is mined from China, but China has begun to restrict exports. Japanese companies believe: "The reason is that we want to obtain our neodymium magnet manufacturing technology." At present, the share of neodymium magnets is almost monopolized by Japanese companies.


In contrast, China "although it has abundant materials that are indispensable when manufacturing neodymium magnets, it cannot produce beautiful products." Therefore, China has revealed the exchange conditions of "as long as we set up factories in China and teach us the manufacturing technology, we can supply a large number of raw materials." One of the specific policies is to restrict exports.

Neodymium magnets are currently the most commercially available magnets and can be said to be the "magnet king" in the magnet world. It has extremely high magnetic properties, and its maximum magnetic energy product (BHmax) is more than 10 times higher than that of permanent magnet ferrite.


It is known from the Segment Neodymium Magnet Supplier that the mechanical processing performance of the neodymium magnet itself is also quite good: the working temperature can reach up to 200 degrees Celsius. And its texture is hard, its performance is stable, and it has a good price-performance ratio, so its application is extremely wide. But because of its strong chemical activity, it must be coated on its surface (such as Zn, Ni plating, electrophoresis, passivation, etc.).


 Neodymium Magnets

 Neodymium Magnets 

This magnet material was introduced by Sumitomo Special Metals in 1984 and is the strongest magnet on the market. Prior to this, the strongest magnets were SmCo magnets developed in Europe and America. Both magnets are now used as components for small engines or speakers. The reason why many machines can be miniaturized is also due to the small and powerful magnets. This magnet has various shapes such as Segment Neodymium Magnet, Rod Neodymium Magnet, block neodymium magnet and so on.


After using this kind of magnet, when people talk about magnets, people will not say "magnet is a substance that adsorbs iron, cobalt, and nickel". Instead, it will think of "any substance has magnetic induction", but iron, cobalt, and nickel are more magnetic, and the magnetic induction phenomenon is more obvious. Other materials can not see the magnetic induction phenomenon without the use of strong magnets. In fact, magnets are divided into paramagnetic and repulsive diamagnetism.


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