Why NdFeB Magnet is Called the "King of Magnets"?

The NdFeB magnet is a tetragonal crystal system crystal formed by neodymium, iron, and boron (Nd2Fe14B). In 1982, Makoto Sasaki of Sumitomo Special Metals discovered the neodymium magnet. This magnet's maximum energy product (BHmax) is greater than that of samarium-cobalt magnets, making it the material with the highest energy product in the world at that time. Later, Sumitomo Special Metals successfully developed the powder metallurgy process, and General Motors successfully developed the melt-spinning process, enabling the production of NdFeB magnets. This magnet is now the second most permanent magnet in terms of magnetism, surpassed only by holmium magnets at absolute zero, and it is also the most commonly used rare earth magnet. It contains a large amount of the rare earth element neodymium, capable of attracting a weight 640 times its own, which is hundreds of times stronger than ordinary magnets. This astonishing figure, coupled with the unique properties of neodymium, has earned the NdFeB magnet the title of "King of Magnets" in the field of magnetic materials.

Where is the "King of Magnets" Used?

It would not be an exaggeration to say that neodymium magnets underpin our modern lives. From speakers to air conditioners, from refrigerators to electric vehicles, magnets are essential in motors that convert electrical current into mechanical power. In essence, magnets bring us the comforts of modern life.

NdFeB is a high-tech material under the National 863 Program, belonging to the category of high-end rare earth materials. It boasts a high cost-performance ratio and has extremely wide applications that touch every aspect of our lives. The only drawback is its suboptimal temperature performance, with significant magnetic loss at high temperatures and a relatively low maximum operating temperature of around 80°C. However, through special treatments, the maximum operating temperature of these magnets can reach 200°C.

Conclusion

In summary, the NdFeB magnet earns the title of "King of Magnets" due to the exceptional magnetic properties imparted by its abundant neodymium content. Its outstanding performance and vast range of applications further solidify this title. With continuous technological advancements and innovations, NdFeB magnetic materials are bound to find even greater application spaces, truly deserving of the title "King of Magnets.