Explore our advanced core product line, customized and engineered for specific commercial and industrial application requirements.
Rare earth magnets, specifically Sintered Neodymium-Iron-Boron (NdFeB) and Samarium-Cobalt (SmCo), represent the zenith of contemporary materials science. Providing unparalleled magnetic energy product-to-volume ratios, these permanent magnets have become indispensable cornerstones of modern industrial transition, powering high-efficiency traction motors, automated robotics, defense aerospace systems, and complex consumer electronics.
As a premier national high-tech enterprise, Zhejiang Laysun Magnetics Ltd. (established in 1999) operates at the forefront of magnetic engineering. We specialize in resolving optimization challenges regarding coercivity, temperature degradation, and environmental corrosion. By utilizing proprietary grain structure alignments and state-of-the-art chemical passivation, we deliver stable magnet systems engineered to withstand intense thermal and kinetic environments.
Maximizing the intrinsic coercivity (Hcj) of NdFeB magnets without compromising remanence (Br) requires pioneering metallurgical solutions. The Laysun engineering roadmap addresses this dilemma via microstructural optimization.
By diffusing heavy rare earth elements (HREE) such as Dysprosium (Dy) or Terbium (Tb) selectively into the grain boundaries of sintered NdFeB, we isolate Dy/Tb at the shell region. This drastically increases high-temperature coercivity while preserving high remanence (Br) in the core, reducing overall Dy/Tb content and maintaining price efficiency.
Unprotected NdFeB is prone to rapid oxidation. We deploy advanced multi-tier protective plating: Nickel-Copper-Nickel (Ni-Cu-Ni), High-durability Organic Epoxy, Zinc Passivation, and specialized Rubber encapsulation. These layers prevent structural decay during acid, humidity, and salt spray exposure.
Utilizing high-power, multi-pole pulsed magnetic fields during our dry pressing stage ensures optimal alignment of the Nd2Fe14B tetragonal crystalline structure. This process increases magnetic flux density alignment to within ±1.5 degrees, assuring highly predictable magnetic fields in critical environments.
| Material Grade Series | Remanence - Br (Kgs) | Coercivity - Hcb (Koe) | Intrinsic Coercivity - Hcj (Koe) | Max Energy Product - (BH)max (MGOe) | Max Working Temp (°C) |
|---|---|---|---|---|---|
| N52 (Standard Grade) | 14.3 - 14.8 | ≥ 10.5 | ≥ 11.0 | 50 - 53 | 80 |
| N45SH (High-Temp Servo Motors) | 13.2 - 13.8 | ≥ 12.0 | ≥ 20.0 | 43 - 46 | 150 |
| N40UH (Automotive Powertrains) | 12.5 - 12.8 | ≥ 12.0 | ≥ 25.0 | 38 - 41 | 180 |
| N35EH (Extreme Thermal Environments) | 11.7 - 12.2 | ≥ 11.0 | ≥ 30.0 | 33 - 36 | 200 |
| N30AH (High-Reliability Industrial Systems) | 10.8 - 11.3 | ≥ 10.2 | ≥ 35.0 | 28 - 31 | 220 |
Our rare earth magnets undergo custom engineering to match precise requirements of diverse industrial ecosystems, from micro-actuators in smart electronics to massive megawatt wind turbines.
Zhejiang Laysun Magnetics Ltd. provides structural supply security to global procurement teams. Our operations are strategically distributed to maximize resource availability and regional logistics speed.
Our raw sintering and smelting hub covers 100,000 square meters in Sichuan, placing us near heavy rare earth mining deposits. This proximity helps isolate our production lines from raw material price fluctuations, providing stable long-term pricing for our export partners.
Simultaneously, our marketing, design, and precision machining hub in Hangzhou, Zhejiang ensures fast connection to major coastal shipping ports. Our integrated facility architecture controls the entire manufacturing journey: from vacuum induction melting (VIM) and hydrogen decrepitation (HD) to multi-axis CNC grinding, coating application, and automated magnetizing.
Operating under high-performance specifications leaves no room for manufacturing variations. Laysun Magnetics maintains a zero-defect quality management program based on comprehensive physical testing.
Using temperature-controlled hysteresisgraphs, we measure the second quadrant demagnetization curve. This verifies exact remanence (Br), coercivity (Hcb/Hcj), and maximum energy product ((BH)max) across target temperatures from -40°C to 240°C.
To simulate multi-decade operating cycles, our magnets are placed in chambers with 120°C, 2 atm pressure, and 100% relative humidity. This allows us to monitor structural decay rates and prevent delamination in demanding applications.
Our multi-camera optical sorters measure dimensional tolerances within ±0.01mm. This process filters out micro-cracks, surface chips, and coating irregularities before packaging, preventing line stoppages for downstream automated assembly.
Quality management standards covering international sales, raw material control, and magnetic testing.
Systemic environmental management protocols to ensure sustainable rare-earth refinement and machining.
Advanced APQP, FMEA, and PPAP integration to support tier-1 automotive manufacturing programs.
Take a virtual tour of our 100,000 square meter plant, showcasing the manufacturing stages of our NdFeB magnets.
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Get answers to common technical, logistics, and manufacturing questions about sourcing wholesale rare earth magnets.
Neodymium magnets (NdFeB) offer the highest maximum energy product ((BH)max) up to 52 MGOe, providing stronger magnetic fields in compact designs. However, they are more susceptible to oxidation and have lower temperature thresholds. Samarium Cobalt (SmCo) magnets have a lower energy product (up to 32 MGOe) but offer high temperature stability (up to 350°C) and strong resistance to corrosion, making them suitable for aerospace and marine applications.
Our standard coatings include Nickel-Copper-Nickel (Ni-Cu-Ni), which is suited for general industrial environments. For outdoor, humid, or chemically aggressive conditions, we provide Zinc (Zn) plating, Epoxy (Black or Gray), Parylene, PTFE (Teflon), and protective Rubber encasing. We also offer passivated chemical barrier treatments.
Our primary processing and sintering plant of 100,000 square meters is located in Sichuan, near Chinese rare earth mining and refinement zones. We purchase raw material stocks in advance and maintain long-term supply agreements. This structure shields our operations from sudden market shifts in Praseodymium-Neodymium (PrNd), Dysprosium (Dy), and Terbium (Tb).
Our facilities are fully certified under ISO9001 and ISO14001, with our automotive product lines adhering to IATF 16949 guidelines. Our magnets are also fully compliant with EU REACH regulations and RoHS directives.
Sintered segment arcs, multi-polar rings, rubber-shielded blocks, and magnetic assemblies for industrial applications.
Laysun Magnetics
