Sintered NdFeB grades by the host who praised two kinds of magnetic properties of three parts, the first part mainly that the chemical symbol for the element neodymium ND, chemical symbol chemical symbol FE iron and boron B, the first of two-part digital line before the material is the maximum energy product (BH) max of the nominal value (in kj / m), the third part after the slash digital, magnetic polarization coercivity value (in units of KA / m) of one-tenth of the value rounded rounded. 

   NdFeB permanent magnet materials based on intermetallic compounds ND2FE14B based permanent magnet material. The main component of rare earth (ND), iron (FE), boron (B). Wherein the rare earth ND in order to obtain different properties available portion of dysprosium (Dy), praseodymium (Pr), and other rare earth substitution, iron can also be cobalt (Co), another metal part of the aluminum (Al) and other alternative, smaller content of boron, but but then the formation of inter-metallic compounds tetragonal crystal structure plays an important role in making the compound having a high saturation magnetization, high uniaxial anisotropy and high Curie temperature. 

   Sintered NdFeB is used in powder metallurgy, alloy melting after a powder and pressed into pressure embryo in a magnetic field, pressure embryo in an inert gas or vacuum sintering to achieve densification, in order to increase the coercive force of the magnet coercivity , aging treatment is often required. 

   Sintered NdFeB permanent magnet materials having excellent magnetic properties, widely used in electronics, electrical machinery, medical equipment, toys, packaging, hardware, machinery, aerospace and other fields, more common permanent magnet motors, speakers, magnetic separator, computer disk drives, magnetic resonance imaging apparatus instrumentation.