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Continuously Leading the Porformance Enhancement of Permanent Magnet Materials
High-Purity Magnet

Reducing impurity elements in sintered neodymium iron boron magnets is key to enhancing magnet performance. Our company achieves low-impurity, high-performance magnets through raw material selection, iterative equipment optimization, and precise control of technical parameters during the preparation process.

Grain Refinement
Grain refinement technology reduces local stray fields by decreasing magnet grain size, thereby achieving the dual objectives of reducing heavy rare earth usage while enhancing magnet coercivity. Our company has developed fine-grained magnets through optimized techniques in smelting, powder preparation, fine powder forming, and sintering, thereby improving the intrinsic properties of the magnets.

Increase nucleation sites, induce nucleation, form fine columnar crystals, optimize casting processes, increase undercooling, and produce cast slabs with well-developed columnar crystals.

Improved powder consistency enables the production of magnets with uniform, fine grain sizes through an optimized sintering process, thereby reducing the effective demagnetizing field.

Achieve clear and continuous grain boundaries, exerting a strong demagnetizing effect to enhance the magnet's coercivity.

Grain Boundary Optimization
The coercivity of sintered neodymium-iron-boron magnets is not only related to the intrinsic properties of the magnet but also closely linked to its microstructure. The composition, type, and distribution of grain boundary phases significantly influence the magnet's coercivity. Therefore, optimizing the grain boundaries to enhance coercivity has become a key strategy for improving material performance. Our company achieves this by precisely designing the proportion of trace element additions and combining this with optimized sintering and aging processes. This results in grain boundary phases that are continuously distributed, uniformly thick, and possess specific structural organization. Consequently, we obtain grain boundaries with excellent microstructures, thereby achieving enhanced magnet performance.
Before optimization
After optimization
Grain Boundary Diffusion

Grain boundary diffusion technology involves subjecting neodymium-iron-boron magnets coated with a heavy rare earth film layer to high-temperature diffusion heat treatment. This process enables heavy rare earth elements to migrate into the magnet interior along grain boundaries, forming a distinctive heavy rare earth shell structure on the surface of the main phase grains. This core-shell structure achieves a significant increase in the magnet's coercivity with minimal heavy rare earth consumption.

Through precise control of diffusion source composition and meticulous process design, our company has achieved enhanced diffusion depth and accelerated diffusion rates. This has further strengthened the coercivity of diffusion magnets and significantly improved the utilization rate of heavy rare earth elements.

Electoral District Diffusion

Our company offers professional magnetic field simulation design tailored to customer requirements, providing comprehensive magnetic application solutions. Due to the inherent structural characteristics of magnets and the demagnetization environments encountered in practical applications, magnets exhibit both easily demagnetized and difficult-to-demagnetize regions. To address these operational characteristics, our company employs selective diffusion technology upon customer request. This process involves targeted diffusion in demagnetization-prone zones to enhance local coercivity. This approach not only reduces the risk of high-temperature demagnetization but also significantly lowers the consumption of heavy rare earth elements.

Regenerative Magnet

Our company possesses a complete production process for recycled magnets. We dismantle and recover permanent magnets from end-of-life equipment such as permanent magnet motors and wind turbine generators. These recovered magnets undergo separation and processing to be remanufactured into permanent magnet materials, achieving magnet regeneration and the recycling of rare earth resources.

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