Explore our engineering-grade custom magnetic materials designed to meet the rigorous specifications of global industrial applications, aerospace technologies, and high-efficiency automotive sectors.
A National High-Tech enterprise pioneering the research, custom sintering, and precision manufacturing of high-coercivity rare earth NdFeB permanent magnets.
Founded at the turn of the millennium in 1999, Zhejiang Laysun Magnetics Ltd. has evolved from a targeted visionary manufacturing unit into a dominant global supplier in the permanent magnetic materials arena. Operating a massive manufacturing facility in Suining, Sichuan, we control the entire processing vertical—from raw rare earth oxide processing to vacuum induction melting, jet milling, magnetic field pressing, sintering, and advanced surface coating treatment.
Our commitment to material science innovation enables us to develop highly stable permanent magnets that power the electric vehicle revolution, industrial servo systems, clean energy turbine generators, and precision smart electronics. We leverage an integrated vertical supply chain to assure price predictability and production continuity for global contract manufacturers.
We work collaboratively with multi-national OEMs to provide simulation-assisted custom designs, ensuring optimal flux distribution and minimal eddy current losses in extreme working temperatures.
Achieving high remanence, robust thermal stability, and exceptional demagnetization resistance through precision metallurgic engineering.
We utilize cutting-edge Dysprosium (Dy) and Terbium (Tb) diffusion technologies to dramatically increase coercive force (Hcj) in NdFeB compounds without compromising residual induction (Br), allowing our magnets to perform optimally up to 220°C in demanding environments.
Equipped with state-of-the-art wire-cutting, double-disc grinding, and automated outer-diameter sizing lines, we comfortably maintain tight dimensional tolerances as thin as ±0.02mm, mitigating mechanical clearance issues during stator-rotor integration.
From multilayer Nickel-Copper-Nickel (Ni-Cu-Ni) and heavy-duty Epoxy coatings to chemically resistant rubber vulcanization, our surface treatment processes guarantee durability against corrosive environments, exceeding standard 240-hour neutral salt spray tests (SST).
Laysun Magnetics continues to invest 6% of annual revenues into our internal laboratories. By collaborating with leading academic material institutes, we actively research chemical composition enhancements to decrease heavy rare-earth dependency, effectively insulating our clients from severe raw material pricing shifts while maintaining consistent structural integrity.
How we address the future limitations of permanent magnets, focusing on thermal coefficient stability, demagnetization limits, and sustainability.
Modern electrical applications demand high operating temperatures, which typically require alloying NdFeB with heavy rare earths like Dysprosium. Laysun’s material scientists are spearheading research on low-HRE formulations. By implementing micro-alloying techniques with elements like Copper (Cu), Aluminum (Al), and Gallium (Ga), we optimize the crystal grain boundaries, creating highly refined microstructure grains. This advancement allows us to supply permanent magnets with excellent thermal resistance while mitigating geopolitical supply risks associated with heavy elements.
For applications such as subsea wind turbines and space exploratory vehicles, replacement cycles are costly. Laysun is developing mechanical sub-assemblies using specialized hermetic encasements. Using advanced finite element analysis (FEA), we calculate dynamic demagnetizing fields and model structural stresses to build zero-degradation magnet assemblies. These customized packages withstand severe pressure differentials, aggressive chemical media, and cryogenic temperatures without mechanical or magnetic fracturing.
How our advanced industrial park ensures consistent quality control and high-volume delivery timelines.
Inside our 100,000 square meter factory, we run state-of-the-art oxygen-free powder handling systems. Neodymium is highly reactive; exposure to ambient oxygen introduces impurities that degrade magnetic remanence ($B_r$) and cause structural micro-cracks. Our manufacturing floor limits oxygen content to below 100 ppm throughout the production process.
By using automated multi-cavity dry-pressing machines inside inert gas chambers, we achieve high density and perfect crystalline orientation, laying the foundation for standard-setting energy products ($(BH)_{max}$).
Every single batch produced at Zhejiang Laysun is laser-etched with a unique traceability code. From hydrogen decrepitation, raw milling, to the vacuum sintering furnace profile, every technical parameter is stored in our MES (Manufacturing Execution System) database. This level of traceability complies with automotive standard IATF 16949, ensuring that if any product exhibits anomalies in the field, we can trace its metallurgical history within minutes.
Global service distribution footprint representing our logistics and technical customer service teams.
Custom designs customized for specialized magnetic assemblies across multiple structural formats and industrial applications.
Deploying specialized magnetic arrays to solve critical operational, efficiency, and torque issues in key target sectors.
Joint-actuators in industrial six-axis robots require high torque density in tight spaces. Our NdFeB custom rings feature multipole magnetization, offering continuous force transmission with zero cogging torque.
UAV brushless outrunner motors demand lightweight magnets with high energy density. Laysun’s custom curved magnets optimize the power-to-weight ratio, extending battery operational life and flight range.
High RPM permanent magnet synchronous motors (PMSM) produce back-EMF and excessive heat. Our SH, UH, and EH grade sintered NdFeB blocks prevent catastrophic demagnetization during sudden speed changes and high acceleration.
Power tool armatures face severe vibration and mechanical shocks. Our epoxy-coated magnets, combined with tailored mechanical retention assemblies, survive dynamic impacts under hard daily use.
Modern acoustic drivers, micro-actuators, and MagSafe adapters require thin, high-precision magnets. We produce custom-calibrated micro-magnets down to thicknesses of 0.5mm with precise flux concentration.
Variable-frequency air conditioner compressors and washing machine motors utilize our high-grade segments to achieve Class A energy efficiency ratings, reducing thermal waste and carbon emissions.
Navigating the complex landscape of raw material validation, environmental certifications, and multi-tier quality checks.
Industrial procurement departments must verify regulatory compliance to avoid production stoppages and import delays. Zhejiang Laysun Magnetics complies with environmental and chemical standards: RoHS, REACH, and Conflict Minerals regulations. Our certifications include:
We provide full chemical composition analysis (ICP-OES reports) and demagnetization curve analysis (hysteresisgraph data) with every production batch to verify the technical specifications of your shipment.
Expert engineering insights regarding sintering chemistry, mechanical limitations, and bulk ordering logistics.
Ensure performance and quality consistency by selecting from our high-magnetic-performance catalog options below.
Laysun Magnetics
