Sintered NdFeB magnets are a kind of rare RD magnets. Compared with conventional magnets e.g.: AlNiCo or hard ferrites, offer NdFeB magnets the tenfold power density. The excellent magnetic characteristics of sintered NdFeB magnets are based on the strong magnetic matrix phase Nd2Fe14B (tetragonal structure), with a very high saturation magnetization Bs (Bs = 1.6 T) and a high magnetic anisotropischen field strength Hcj of up to 41 kOe. The current energy product from NdFeB magnets amounts to up to 47 MGOe. In the laboratory an energy product was already reached by 55,8 MGoe. This achievement opened a far field of new application possibilities for the material.