Grain Refining Technology is an effective approach to enhance the intrinsic coercivity of sintered Neodymium Magnets, thus it is regarded as a main solution to prepare high intrinsic coercivity magnets with low/free heavy rare earth elements.
Theoretical and experimental results show that under the same alloy composition, fine-grained magnetic powder can obtain higher intrinsic coercive field strength HcJ. By refining the grain size and optimizing the sintering process, the grain size of Sintered Neodymium Magnets is reduced, leading to an increase in the intrinsic coercive field strength HcJ of the magnet.
Besides, Grain Refining Technology is no limit on the dimension, unlike Grain Boundary Diffusion technology.
