Engineered with optimized iron magnetic properties for maximal torque density and thermal stability.
Founded at the turn of the millennium in 1999, Zhejiang Laysun Magnetics Ltd. has evolved from a pioneering scientific startup into an industry-leading national high-tech manufacturer specializing in rare earth NdFeB permanent magnets. Located on a state-of-the-art 100,000 square meter factory campus in Sichuan, China, our specialized team of 300+ engineering professionals and technicians supports an annual production capacity exceeding 5,000 tons.
Our operational ethos integrates research, production, engineering, and global logistics under the strict parameters of ISO9001 and ISO14001, providing structural magnetic solutions to the world’s most demanding industries.
The core performance of modern rare earth magnets relies heavily on the fundamental physics of iron magnetic properties. In a sintered Neodymium-Iron-Boron (NdFeB) matrix, the microscopic crystal structure consists primarily of the $Fe_{14}Nd_2B$ tetragonal phase. Iron provides the high spontaneous magnetization ($M_s$) due to the alignment of 3d electron spins, while Neodymium ions contribute the high magnetocrystalline anisotropy necessary to resist demagnetization.
To configure magnets for industrial applications like wind turbine generators or electric vehicle (EV) drivetrains, engineers must optimize the grain boundary phases. Unchecked grain growth and structural defects act as nucleation sites for reverse magnetic domains, which drastically degrades the magnet's thermal limit and energy product ($(BH)_{max}$).
At Zhejiang Laysun Magnetics, we manage microstructural dynamics through precise chemical compositions and specialized vacuum sintering. Standard iron elements undergo secondary phase modifications by introducing transition metals like Cobalt ($Co$), Copper ($Cu$), and Aluminum ($Al$). Cobalt substitutes for iron in the main phase crystal matrix, which directly elevates the Curie temperature ($T_c$) of the NdFeB compound from approximately 312°C up to over 380°C.
By controlling the chemistry at the grain boundaries, we limit the thermal decay of iron magnetic characteristics. This makes our sintered NdFeB blocks and arcs highly reliable for high-vibration, high-heat environments.
Our ISO9001 certified manufacturing workflow integrates oxygen-free strip casting, hydrogen decrepitation, jet milling, and transverse magnetic field pressing inside nitrogen-purged chambers. By preventing the oxidation of raw iron and neodymium particles down to the sub-micron scale, we achieve outstanding micro-structural uniformity.
Every batch of our high-grade sintered NdFeB blocks, cylinders, and arcs undergoes rigorous flux density validation via industrial Helmholtz coils and hysteresisgraph plotters. This guarantees that the final products conform precisely to global standards.
In the modern industrial landscape, procurement teams in North America, Western Europe, and East Asia are faced with complex supply chain issues. The primary challenge lies in securing permanent magnets that combine high efficiency with long-term cost stability. With the rising demand for Electric Vehicles (EVs), Automated Guided Vehicles (AGVs), and smart home appliances, raw material fluctuations in Dysprosium ($Dy$) and Terbium ($Tb$) directly impact component costs.
To mitigate these risks, major OEMs are transitioning toward Heavy Rare Earth Free (HREE-free) and low-HREE configurations. Zhejiang Laysun Magnetics addresses this market shift through advanced Grain Boundary Diffusion (GBD) technology. This process diffuses Dysprosium or Terbium exclusively along the boundary regions rather than through the entire crystal grain, maintaining high coercivity while keeping raw material usage and overall production costs low.
Because of the high iron content in Neodymium-Iron-Boron magnets, they are inherently susceptible to oxidation and galvanic corrosion, especially in humid or chemical-heavy environments. A key criteria for selecting a magnetic supplier is the quality of their surface passivation and coating processes.
We provide a range of advanced coating solutions tailored to different operational environments:
Why global enterprises trust Zhejiang Laysun Magnetics for critical system design.
Our state-of-the-art laboratory features scanning electron microscopes, laser particle size analyzers, and high-temperature demagnetization testing gear, ensuring every batch meets the exact specifications of your design.
Supported by our 100,000 square meter facility and fully automated raw material processing, we offer consistent production cycles and reliable delivery schedules for global high-volume contracts.
From the initial raw materials to the final coatings, our production processes follow IATF 16949 standards, providing the complete traceability and component reliability required for automotive applications.
High-performance Neodymium-Iron-Boron magnets are critical components across a wide range of modern technologies. By tailoring the material's properties—such as the ratio of iron to rare-earth elements and the specific microstructural alignment—we meet the unique demands of diverse industries.
Our products are engineered for several key sectors:
The next step in the evolution of rare earth magnets focus on improving sustainability and reducing dependencies on critical raw materials. Our current R&D efforts are centered on optimizing grain structures to further reduce heavy rare earth content while maintaining high thermal performance. At the same time, we are working on improving recycling technologies to extract and reuse NdFeB material directly from end-of-life electronics.
By refining the processing of iron-rich phases and developing advanced grain boundaries, we continue to push the performance limits of sintered magnets. This commitment to research and development helps ensure that our products remain at the forefront of the industry.
Manufactured under strict global quality and environmental standards.
Technical answers to key inquiries regarding NdFeB and iron magnetic properties.
Select from our high-performance range of rare earth permanent magnets.
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Laysun Magnetics