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Why is NdFeB called "magnetic king"?



  Artificial magnets appeared in the eighteenth Century, but the process of
making higher magnetic materials was slow until 1920s. Then, in 1948, made of 
ferrite, created in 70s (SmCo), samarium cobalt rare earth magnet Nd-Fe-B magnet was born in 1986, this is the world's strongest magnet up to now. The physical magnetic technology has been rapid development of NdFeB magnet materials also makes the components more compact, and quickly spread in the industry, China Nd-Fe-B magnet industry ushered in the rapid development of the new world.

     First, NdFeB , simply speaking, is a magnet, and we usually see the difference is that the magnet, because of its excellent magnetic properties and  called "magnetic king."". Neodymium iron boron contains a large number of rare earth elements neodymium, iron and boron, its characteristics are hard and brittle. Because the surface is easily oxidized and corroded, NdFeB must be treated with surface coating. Surface chemical passivation is one of the best solutions.
   Second, as the magnetic NdFeB rare earth permanent magnet material with high coercive force and the product, at the same time, the advantages of high energy density, the Nd-Fe-B permanent magnetic materials have been widely used in modern industry and electronic technology, so that the instrument, electro acoustic electric, magnetic magnetization and other small, equipment the lightweight, thin possible. The advantages of NdFeB is cost-effective, with good mechanical properties; shortcomings of low working temperature, temperature difference, and easy powder corrosion, surface treatment must be adjusted by the chemical composition and take to improve, in order to meet the requirement of practical application.
  Third, NdFeB magnetic material, as the latest development of rare earth permanent magnet material, NdFeB magnetic material is praseodymium neodymium metal and boron alloy. Also called magnetic steel. NdFeB has a very high energy product and coercive force, and the advantages of high energy density, the Nd-Fe-B permanent magnetic materials have been widely used in modern industry and electronic technology, so that the instrument, electro motor, magnetic magnetization devices such as miniaturization, lightweight, thin as possible. Sintered NdFeB permanent magnetic material has excellent magnetic properties, widely used in electronics, electrical machinery, medical equipment, toys, packaging, hardware machinery, aerospace and other fields, there are the more common permanent magnet motors, speakers, computer disk drives, magnetic separator, magnetic resonance imaging instrument etc..

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