Chemical composition of NdFeB permanent magnetic material:
Neodymium-iron-boron (NdFeB) permanent magnetic material is a permanent magnetic material based on the intermetallic compound Nd2Fe14B. The main components are the rare earth elements neodymium (Nd), iron (Fe), boron (B). The rare earth elements are mainly neodymium (Nd), in order to obtain different properties can be part of dysprosium (Dy), praseodymium (Pr) and other rare earth metals instead of iron can also be cobalt (Co), aluminum (Al) and other metals partially replaced, boron's content is relatively small, but it is the formation of the tetragonal crystal structure of intermetallic compounds play an important role in the formation of the compound, making the compounds have a high saturation magnetizing strength, high uniaxial anisotropy and high Curie temperature.
The third generation of rare-earth permanent magnet NdFeB is the strongest performance of contemporary magnets, its main raw materials are rare-earth metal neodymium 29%-32.5% metal element iron 63.95-68.65% non-metallic element boron 1.1-1.2% add dysprosium 0.6-8% niobium 0.3-0.5% aluminum 0.3-0.5% copper 0.05-0.15% and other elements .
Identification
1. Usually and a magnet of the same specifications on a plane that can be adsorbed, such as: patches, blades, iron gates, etc., with the feel to identify the size of the magnetic force
2. With electronic scales: weak magnet is generally related to his density, density is small, then the magnetic force is relatively small, heavy weight, then the magnetic force is relatively large, on the contrary, light weight magnetic force is small if the magnet requirements are relatively high on the need for instrumentation testing.