The advantage of sintered NdFeB magnets are cost-effective

The advantage of sintered NdFeB magnets are cost-effective, with good mechanical properties; downside is the low Curie point, the temperature characteristic is poor, and easy chalking corrosion must be taken to adjust its chemical composition and surface treatment methods make it is improved, in order to reach the actual application requirements.

Neodymium magnet permanent magnet is divided into two kinds of sintered NdFeB and bonded NdFeB, Bonded NdFeB magnetic properties in all directions, corrosion-resistant; while neodymium magnets due to corrosive, the surface to be coated, usually galvanized, nickel , zinc-, green nickel, nickel-copper-nickel, nickel-copper-nickel and other environmental protection. And it normally sintered neodymium magnet axial and radial magnetization magnetized, according to the required face to be.

Chemical composition of neodymium magnet material is based intermetallic compound RE2FE14B permanent magnet material. The main component of rare earth (RE), iron (FE), boron (B). Wherein the rare earth ND usable portion in order to obtain different properties of dysprosium (Dy), praseodymium (Pr) and other rare earth metal substitution, iron can also be cobalt (Co), aluminum (Al).

And other metal parts replacement, the content of boron is small, but the but then form a tetragonal crystal structure of the intermetallic compound plays an important role in making a compound having a high saturation magnetization, high uniaxial anisotropy and high Curie temperature.