Ndfeb permanent magnets with its excellent performance, rich raw materials, reasonable prices are being rapidly developed and widely used. It is mainly used in micro motor, permanent magnet instrument, electronic industry, automobile industry, petrochemical industry, nuclear magnetic resonance device, sensor, audio equipment, magnetic suspension system, magnetic transmission mechanism and magnetic therapy equipment.
The main raw materials of NdFeb permanent magnets are rare earth metal neodymium (Nd) 32%, metallic element iron (Fe) 64% and non-metallic element boron (B) 1% (a small amount of added dysprosium (Dy), terbium (Tb), cobalt (Co), niobium (Nb), gallium (Ga), aluminum (Al), copper (Cu) and other elements). Ndfeb ternary permanent magnet material is based on Nd2Fe14B compound as the matrix, its composition should be similar to the compound Nd2Fe14B molecular formula. However, when the composition of Nd2Fe14B is completely matched, the magnetic property of the magnet is very low, or even no magnetic. Only the content of neodymium and boron in the actual magnet is more than that of Nd2Fe14B compound can obtain better permanent magnet performance.