Raw material cost occupy the largest proportion in the whole magnet cost. As a primary raw material, the content of PrNd mischmetal in sintered Neodymium magnet is around 30wt%. Fluctuations of PrNd price trend have the most direct influence on the sintered Neodymium magnet price. Heavy rare earth elements (HREEs) Dysprosium (Dy) and Terbium (Tb) are typically used in the form of DyFe alloy and Tb metal. Either Dy or Tb can significantly enhance intrinsic coercivity Hcj of sintered Neodymium magnet, but the cost is sharply increasing at the same time. Thereby, HREEs-less and HREEs-free solution like grain boundary diffusion (GBD) technology have introduced to reduce HREEs use.[visualizer id=”2468″ lazy=”no” class=””]