Engineered components designed for high-density magnetic fields and demanding industrial applications.
Exploring the physical limitations, magnetic domains, and alignment profiles required for high-coercivity OEM NdFeB solutions.
The magnetization of ferromagnetic and ferrimagnetic materials—specifically high-performance Neodymium-Iron-Boron (NdFeB) alloys—requires an understanding of atomic-scale magnetic domains. Prior to magnetization, these domains are randomly oriented, resulting in a net-zero magnetic field. Achieving saturation magnetization ($M_s$) requires exposing the material to an external magnetic field ($H$) that exceeds the coercivity ($H_c$) of the specific alloy formulation.
Our OEM magnetization services utilize capacitor discharge (CD) magnetizers capable of generating transient fields upwards of 4.5 Tesla. This is critical for high-grade SmCo and NdFeB alloys, where magnetic anisotropy prevents domain rotation under weaker fields. The precise alignment of these domains defines the final remanence ($B_r$) and energy product ($(BH)_{max}$) of the components, directly impacting motor efficiency, torque output, and sensor reliability.
Your Global Partner for Advanced Permanent Magnets and Engineered Solutions Since 1999.
Founded at the turn of the millennium, Zhejiang Laysun Magnetics Ltd. has evolved from a visionary startup into an industry pacesetter. Our state-of-the-art manufacturing factory, spanning across 100,000 square meters in the vibrant industrial landscape of Suining, Sichuan, serves as the operational hub for our rare earth technologies. Here, our dedicated team of 300+ professionals manufactures over 5,000 tons of rare earth magnets annually.
We specialize in the research, development, and high-volume production of high-performance sintered NdFeB magnets. These components are integral to modern electric vehicles, aerospace systems, high-efficiency industrial motors, medical equipment, and consumer electronics.
Technical capabilities, rigorous quality assurance, and end-to-end supply chain integration.
Equipped with specialized vacuum sintering furnaces, automated sizing machinery, and high-energy magnetization systems that guarantee tight dimensional and magnetic tolerances.
Our operations comply with global quality standards, ensuring traceability from raw material procurement to final magnetic testing and flux-density mapping.
We provide direct engineering support to assist client teams with magnet geometry design, finite element analysis (FEA), and optimal coating selection.
Powering global innovations in automation, green transportation, and precision dynamics.
Providing high-coercivity NdFeB segments for joint servo motors, enabling high torque-to-weight ratios and precise position controls.
Lightweight, high-energy outrunner motor magnets that maximize payload limits and dynamic responsiveness.
Engineered traction motor magnets featuring low heavy-rare-earth content, optimized for thermal stability under heavy cycles.
Highly durable, impact-resistant NdFeB blocks that enhance brush motor efficiency and double service life.
Micro-engineered magnetic arrays for smartphones, MagSafe rings, audio speakers, and haptic feedback devices.
Quiet, high-efficiency compressor magnets for inverter HVAC systems and washing machine direct-drive motors.
Addressing raw material volatility, environmental compliance, and supply chain security for multi-national organizations.
Procuring raw magnetic materials—such as Neodymium (Nd), Praseodymium (Pr), Dysprosium (Dy), and Terbium (Tb)—requires careful risk management. Driven by green transition technologies, raw material price fluctuations can affect operational budgets. Laysun Magnetics helps address these challenges through forward-contract pricing models, raw material hedging strategies, and long-term procurement agreements.
Furthermore, our engineering teams are leaders in Grain Boundary Diffusion (GBD) technology. This manufacturing technique selectively diffuses heavy rare earths (Dy and Tb) only through the grain boundary regions of the magnet, rather than throughout the entire crystal structure. This optimizes high-temperature coercivity while reducing raw material costs for our global partners.
Explore our technical catalog of high-grade permanent magnets and custom magnetic assemblies.
Engineered for optical pickup units, auto-focus modules, and hard disk drives requiring rapid response times.
Radial, diametrical, or multi-pole magnetization configurations designed for high-performance rotor shafts.
Standard and customized geometries treated with multilayer plating (Ni-Cu-Ni, Zn, or Epoxy) to protect against corrosion.
Broad range of grades from N35 to N52, as well as high-temperature variants including UH, EH, and AH series.
Precision multi-pole magnetic rings optimized for consumer electronics charging interfaces and docking accessories.
Specifically engineered to resist thermal degradation and structural fatigue inside high-speed electric vehicle drivetrains.
Small-scale, high-density disc components optimized for modern sensors and precision industrial relays.
High aspect ratio cylindrical designs, providing focused, deep-reaching magnetic fields for sensing applications.
Engineered for electric power steering assemblies, featuring optimized magnetic fields to prevent torque ripple.
Heavy-duty permanent magnet blocks designed for material handling, separation, and heavy machinery.
Curved segments designed for assembly into high-efficiency motor stators and power generator rotors.
Ultra-thin circle arrays that provide secure, reliable alignment for mobile charging and mount ecosystems.
Operating under rigorous industrial standards to meet international trade, environmental, and engineering specifications.
Our commitment to engineering quality is backed by certifications across critical frameworks. Zhejiang Laysun Magnetics Ltd. meets standards including ISO 9001, ISO 14001, and IATF 16949—the strict automotive standard required for Tier-1 supply chains.
All delivered products comply with RoHS and REACH regulations, ensuring the absence of hazardous elements. Additionally, for specialized industrial components, we follow API frameworks (including API 6D, API 607, TS standards) to meet safety requirements in extreme applications.
Headquartered in Hangzhou, China, with manufacturing facilities in Sichuan, Laysun Magnetics coordinates global logistics to ensure on-time delivery across North America, Europe, and the APAC region.
Developing next-generation magnetic solutions to support global decarbonization and automation initiatives.
We continue to refine our grain boundary diffusion protocols to achieve high thermal stability (up to 240°C in AH grades) while significantly reducing reliance on expensive Dysprosium and Terbium. This ensures more predictable pricing and supports supply chain stability.
To help clients meet scope 3 emissions targets, we are investing in closed-loop recycling processes. Our goal is to reclaim scrap sintered material and re-introduce it into standard manufacturing runs without compromising magnetic performance.
As motor designs become more compact, magnetizing individual components prior to assembly presents handling challenges. We are collaborating with rotor developers to design custom magnetization fixtures that magnetize complex rotor assemblies after they are built, improving assembly efficiency.
To meet the durability requirements of aerospace and automotive applications, we are expanding our coating portfolio. This includes advanced thin-film epoxy and chemical-vapor-deposited coatings designed to prevent corrosion in harsh chemical and marine environments.
Detailed answers to common engineering, quality, and procurement questions.
Isotropic magnets possess identical magnetic properties in all directions, meaning they can be magnetized along any chosen axis after fabrication, though they exhibit lower magnetic energy product ($(BH)_{max}$). Anisotropic magnets are aligned along a preferred magnetic orientation during the pressing process. This results in significantly higher magnetic performance in the specified orientation direction.
High-coercivity materials (such as N45SH or N42UH NdFeB) are specifically engineered to resist demagnetization. Overcoming this resistance to align the internal magnetic domains requires a very strong external field—typically 3 to 4 times the material's intrinsic coercive force ($H_{cj}$). This requires high-voltage capacitor discharge magnetizers and custom-wound, low-impedance coils capable of handling massive transient currents.
Sintered NdFeB magnets are sensitive to temperature. Both remanence ($B_r$) and coercivity ($H_c$) decrease as temperature rises, following specific temperature coefficients ($\alpha$ and $\beta$). If the operating temperature exceeds the magnet's Maximum Operating Temperature, it will experience irreversible loss of magnetic performance. Selecting the correct grade (e.g., M, H, SH, UH, EH, AH series) is essential to ensure stability at the application's maximum thermal limit.
Because neodymium magnets contain active iron, they are susceptible to oxidation. Common protective coatings include multi-layer Nickel-Copper-Nickel (Ni-Cu-Ni), Zinc (Zn) electroplating, Epoxy resins, Gold, or Parylene. For automotive and marine applications, epoxy or specialized passivated finishes are preferred due to their superior resistance to salt spray and moisture.
We verify magnetic quality using Helmholtz coil systems to measure total magnetic flux, hysteresisgraph systems ($B-H$ curve tracers) to record remanence, coercivity, and energy product, and automated 3D Hall probes to map surface flux density. Testing documentation, including material test reports, dimensional inspection data, and plating thickness verifications, is provided with production shipments.
Permanent magnetic assemblies, lifters, and custom configurations for industrial systems.
Laysun Magnetics