Explore our top engineered rare earth components designed for automotive EPS, voice coil motors, MagSafe couplings, and industrial tooling.
Pioneering standard-setting industrial neodymium supply lines from Hangzhou and Suining to global OEMs.
Zhejiang Laysun Magnetics Ltd. stands as a national high-tech enterprise, specializing in the scientific research, design, production, and distribution of high-performance rare earth permanent NdFeB (Neodymium Iron Boron) magnets. Since our founding at the turn of the millennium, we have scaled our capacity to accommodate the complex requirements of next-generation technological applications.
Our industrial output encompasses key engineering segments such as electric vehicles, wind power generation, high-end sensors, smart robotics, and micromotors. Through heavy investment in material science R&D, we manufacture customized sintered and bonded magnetic parts designed for extreme heat resistance, high coercivity, and maximum magnetic energy product density ($BH_{max}$).
A deep dive into supply chains, raw material dynamics, and macro industrial reliance on micro-sized NdFeB components.
In modern industrial applications, the trend of miniaturization is non-reversible. Micro-positioning stages, optical focus arrays in smartphones, unmanned aerial vehicles (UAVs), and medical implants demand exceptionally high magnetic flux fields packaged into sub-millimeter profiles. This demand profile has positioned sintered NdFeB magnets as an indispensable material class in high-tech manufacturing.
China commands over 85% of global rare earth processing and magnet production capacities. Leveraging locally refined Light Rare Earth Elements (LREEs) like Neodymium (Nd) and Praseodymium (Pr), along with strategic heavy rare earths (HREEs) like Dysprosium (Dy) and Terbium (Tb), Chinese manufacturers like Zhejiang Laysun Magnetics Ltd. deliver advanced, cost-competitive magnetic solutions. The proximity to raw mining resources, coupled with mature metallurgical tooling ecosystems, enables rapid prototyping of specialized, custom geometry magnets—ranging from complex multi-pole ring magnets to ultra-thin block plates.
Global logistics and green energy transitions dictate strict compliance metrics for industrial supply channels. Rare earth metals are classified as critical raw materials. As an established exporter, Zhejiang Laysun Magnetics Ltd. addresses this challenge by optimizing raw-material-to-finished-product traceability. This safeguards consistency and stabilizes pricing matrices for Tier-1 automotive and aerospace vendors who depend on steady NdFeB component deliveries.
Micro-sized NdFeB magnets operate under severe electromagnetic stress. To prevent thermal demagnetization, the alloy microstructure must be highly engineered. Standard neodymium magnets suffer structural degradation above 80°C. By implementing precise stoichiometric control and adding dopants (such as Cobalt, Dysprosium, and Terbium), Zhejiang Laysun Magnetics manufactures magnets with thermal ratings up to 220°C (AH, EH, and UH series). This is essential for brushless DC (BLDC) motors and high-rpm rotors operating in demanding environments.
Engineering micro-scale magnetic arrays with high coercivity and low Heavy Rare Earth (HREE) content.
Our technology roadmap prioritizes two primary vectors: maximizing remanence ($B_r$) and reducing heavy rare earth reliance through innovative Grain Boundary Diffusion (GBD) processes. Traditionally, high thermal stability required uniform mixing of Dysprosium (Dy) throughout the Nd-Fe-B crystal structure. However, this method degrades the overall remanence.
GBD technology solves this trade-off by diffusing Dy or Terbium (Tb) vapor selectively along the grain boundaries of the sintered magnet. This treatment yields high intrinsic coercivity ($H_{cj}$) while maintaining superior remanence, resulting in compact magnets with exceptional energy density. This technological edge is critical for high-efficiency components, including voice coil motors (VCMs) and electric vehicle power steering systems (EPS).
Utilizing high-precision wire-cutting (WEDM), automated slicing lines, and diamond wheel grinding, we achieve tolerances as tight as ±0.01 mm for specialized micro-magnets.
Micro-magnets are highly vulnerable to environmental oxidation. We offer custom surface finishes, including Ni-Cu-Ni electroplating, chemical vapor deposited Parylene, and specialized epoxy barriers.
Through customized magnetizing fixtures, we can generate skewed, radial, and multi-pole magnetization profiles across extremely small surfaces to optimize torque profiles.
Engineered magnetic formats designed to meet stringent industry standards across electrical, aerospace, and medical sectors.
Four pillars that define Zhejiang Laysun Magnetics Ltd.'s approach to customer partnerships and engineering excellence.
Our operations are structured around four strategic pillars: Quality, Credibility, Technology, and Innovation. Rather than focusing solely on material output volume, we prioritize integration with customer R&D departments. Our application engineers collaborate directly with designers to simulate magnetic fields via Finite Element Analysis (FEA), optimizing magnet geometries prior to volume manufacturing.
This systematic methodology helps eliminate assembly-level mechanical failures, reduce scrap rates, and lower overall system costs. From initial alloy formulation to final packaging, our quality management systems ensure consistent product performance, cycle after cycle.
Our quality control processes utilize advanced instrumentation, including demagnetization curves testing systems, optical coordinate measuring machines (CMMs), and salt spray chambers. This rigorous testing ensures all components comply with international dimensional and electromagnetic standards.
We continuously invest in material science R&D. Our ongoing development projects focus on minimizing thermal aging losses, enhancing high-frequency resistivity in motor laminations, and improving grain boundary structure engineering.
Operating a 100,000 m² production facility in Suining, Sichuan, and supported by our headquarters in Hangzhou, Zhejiang, we leverage robust transport links to ensure reliable global delivery.
How Zhejiang Laysun Magnetics enables next-generation performance in dynamic technology sectors.
Our manufacturing processes are certified to meet international industrial, safety, and environmental standards.
At Zhejiang Laysun Magnetics Ltd., quality assurance is integrated into every step of production. We maintain rigorous standards compliant with ISO9001, ISO14001, ISO18001, CE, API 6D, and API 607. If you require copies of our official compliance certificates, please contact our quality department.
Strategically headquartered in Hangzhou, China, coordinating regional offices and support centers worldwide.
Through our Hangzhou headquarters and global logistics networks, we ensure efficient supply lines to engineering partners in North America, the European Union, Southeast Asia, and Japan. Our localized customer service teams provide technical assistance and ensure regulatory compliance for international shipments.
Precision permanent NdFeB blocks, multi-pole rings, VCM components, and magnetic materials engineered for industrial applications.
Answers to common engineering inquiries regarding material science, design criteria, and environmental stability.
The primary limiting factor is the intrinsic coercivity ($H_{cj}$) of the Nd-Fe-B alloy. Standard grades (N-series) suffer permanent demagnetization above 80°C (176°F). To operate at higher temperatures, Neodymium is partially replaced with Dysprosium (Dy) or Terbium (Tb), which increases the magnet's resistance to thermal demagnetization. We offer specialty grades (M, H, SH, UH, EH, AH series) engineered to perform reliably at operating temperatures up to 220°C.
Traditional alloying distributes Heavy Rare Earth Elements (HREEs) like Dysprosium throughout the entire crystalline structure, which reduces the magnet's overall remanence ($B_r$) and energy product ($BH_{max}$). GBD technology diffuses HREEs selectively along the crystal grain boundaries. This concentrates the heat-stabilizing elements where they are most effective, minimizing thermal demagnetization while preserving high magnetic strength.
Neodymium magnets contain free iron, making them susceptible to oxidation. For small and micro-sized magnets, we apply specialized surface treatments. Standard options include electroplated multi-layer Nickel-Copper-Nickel (Ni-Cu-Ni) and corrosion-resistant Zinc (Zn). For high-moisture or chemical environments, we offer vapor-deposited organic polymers (Parylene-C) or epoxy coatings to provide a durable moisture barrier.
Using diamond slicing wheels and specialized grinding equipment, we regularly achieve dimensional tolerances of ±0.05 mm, with precision grinding capable of reaching ±0.01 mm for critical applications. Maintaining tight tolerances is essential to prevent magnetic gap variations in high-performance applications like voice coil motors (VCMs) and optical actuators.
Every production batch undergoes comprehensive testing using hysteresisgraph systems to map demagnetization curves and verify remanence ($B_r$), coercivity ($H_{cb}$/$H_{cj}$), and maximum energy product ($BH_{max}$). We also conduct flux tests, salt spray testing, and thermal decay measurements to ensure each shipment complies with our strict quality control standards.
Collaborate with Zhejiang Laysun Magnetics Ltd. to develop custom magnetic solutions. Submit your email address, and our engineering team will respond within 24 hours.
Laysun Magnetics