Explore our leading selection of custom rare earth magnetic arrays, high-temperature NdFeB compounds, and OEM assemblies designed for industrial and commercial excellence.
Founded at the turn of the millennium, Zhejiang Laysun Magnetics Ltd. has rapidly evolved from a visionary startup to an industry pacesetter in the rare earth permanent magnet sector.
Our state-of-the-art manufacturing facility, sprawling across 100,000 square meters in the vibrant city of Suining, Sichuan, serves as the engineering core of our operations. Supported by a highly skilled workforce of 300+ professionals, we maintain a robust annual output of 5,000 tons of high-grade Neodymium Iron Boron (NdFeB) magnets, ensuring reliable bulk supply to global industries.
A deep dive into structural morphology, magnetic field distribution, and NdFeB compound optimizations.
Square and rectangular block magnets play a structural and performance role in modern electromagnetic energy conversion systems. Unlike circular disk magnets, which present symmetrical magnetic fields, the square geometry provides a highly directed flux path that can be concentrated to maximize magnetic flux density ($B_r$) across target surface planes. This structural geometry allows for precise nesting within electrical steel laminations and sensor channels.
At Zhejiang Laysun Magnetics, our engineering division optimizes the square NdFeB alloy composition through advanced metallurgy. By manipulating ratios of heavy rare earth elements (HREEs) like Dysprosium (Dy) and Terbium (Tb), we shift the intrinsic coercive force ($H_{cj}$) boundaries, allowing our square magnets to operate continuously at elevated temperatures (up to 220°C in high-coercivity grades) without permanent demagnetization.
| Magnet Grade | Remanence (Br) - kG | Coercivity (Hcb) - kOe | Intrinsic Coercivity (Hcj) - kOe | Max Energy Product (BH)max | Max Temp (°C) |
|---|---|---|---|---|---|
| N35 - N52 | 11.7 - 14.8 | ≥ 10.8 - 11.2 | ≥ 12.0 | 33 - 53 MGOe | 80°C |
| N35M - N50M | 11.7 - 14.3 | ≥ 11.1 - 11.6 | ≥ 14.0 | 33 - 51 MGOe | 100°C |
| N33H - N48H | 11.3 - 13.9 | ≥ 10.7 - 11.3 | ≥ 17.0 | 31 - 49 MGOe | 120°C |
| N30SH - N45SH | 10.8 - 13.6 | ≥ 10.1 - 11.1 | ≥ 20.0 | 28 - 46 MGOe | 150°C |
| N28UH - N40UH | 10.2 - 12.8 | ≥ 9.6 - 10.5 | ≥ 25.0 | 26 - 41 MGOe | 180°C |
| N28EH - N38EH | 10.2 - 12.5 | ≥ 9.5 - 10.4 | ≥ 30.0 | 26 - 39 MGOe | 200°C |
| N28AH - N35AH | 10.2 - 11.8 | ≥ 9.5 - 10.2 | ≥ 33.0 | 26 - 36 MGOe | 220°C |
The choice of anti-corrosion coating is vital for guaranteeing operational life, especially in aggressive ambient conditions. Zhejiang Laysun Magnetics offers custom barrier solutions:
Triple-layer electroplating provides structural resilience and salt-spray resistance (up to 72 hours under ASTM B117 standards).
Delivers excellent dielectric insulation properties and optimal performance in high humidity, water spray, or chemical contact.
Ultra-thin, pinhole-free vacuum deposited coatings ideal for cleanrooms, bio-medical devices, and micro-sensors.
Why Zhejiang Laysun Magnetics Ltd. is the designated supplier for Fortune 500 engineering groups.
Operating under comprehensive IATF 16949, ISO 9001, and ISO 14001 frameworks, we offer traceable testing protocols for raw materials through final magnetic testing.
Our engineering facility continuously integrates state-of-the-art Grain Boundary Diffusion (GBD) technology to produce heavy-rare-earth-reduced, cost-stable magnets.
Fully compliant with international chemical, trade, and environmental regulations including REACH, RoHS, TSCA, and Conflict Minerals declarations.
Securing raw material upstream integration, advanced manufacturing processes, and global transport channels.
China remains the epicenter of the rare earth elements (REE) supply chain, processing over 70% of the world's Neodymium ($Nd$), Praseodymium ($Pr$), Dysprosium ($Dy$), and Terbium ($Tb$). By basing our massive 100,000-square-meter facility in Suining, Sichuan, Zhejiang Laysun Magnetics secures a highly robust raw material pipeline directly linked to major state-owned mineral processing centers. This integration buffers our buyers against regional price spikes, unexpected tariffs, and mineral allocation crunches.
Direct partnerships with key rare earth oxides miners prevent sudden price spikes and stabilize large production schedules.
From vacuum induction melting and jet milling to pressing, sintering, machining, and plating, our processes remain completely in-house.
Strategically positioned distribution networks across major shipping hubs in Ningbo, Shanghai, and Shenzhen enable fast air and sea freight logistics.
Our production lines implement a lean manufacturing system designed to minimize scrap rate during the slicing and grinding of square NdFeB blocks. By deploying multi-wire slicing saws and automated CNC grinders, we maintain geometrical tolerances as tight as ±0.02mm, drastically reducing manufacturing waste and providing highly competitive pricing structures to our global partners.
From industrial micro-actuators to gigawatt-scale wind energy conversion, our magnets drive technology forward.
Square magnets deliver highly concentrated torque profiles inside joint servo motors, enabling high dynamic response and precision movements.
Ultralight, high-energy-density NdFeB compound rings and blocks maximize stator magnetic flux, reducing total propulsion weight.
Automotive traction rotors depend on highly stable SH, UH, and EH grade sintered NdFeB blocks to maintain efficiency during high-torque acceleration phases.
Brushless motors equipped with square neodymium blocks offer high heat tolerance, long service life, and optimal power-to-weight ratios.
Miniaturized NdFeB block configurations are critical for linear resonance actuators in smartphones, high-fidelity loudspeaker voice coils, and consumer device interfaces (such as ring-shaped Magsafe arrays). By optimizing structural alignment, we guarantee crisp tactile response, reliable latching force, and maximum audio clarity.
Smart washing machines, air conditioning compressors, and cooling fans utilize variable-frequency inverter motors powered by our high-performance NdFeB magnets. These systems yield over 30% reduction in electricity consumption compared to legacy ferrite designs.
Positioning Zhejiang Laysun Magnetics at the cutting edge of advanced materials science.
Developing low-Dy/Tb and Dy-free technologies. By applying thin dysprosium coatings to the outer grain structure and using precise heat treatments, we increase intrinsic coercivity while keeping critical raw material costs low.
Refining NdFeB alloy composition to support extreme industrial applications up to 240°C, ensuring reliable operation in geothermal generators, heavy machinery, and deep-space vehicles.
Implementing active magnet-to-magnet recycling methods. Extracting sintered NdFeB scrap from end-of-life electronics to reform high-purity rare earth powders, significantly lowering the carbon footprint of production.
Rigorous inspection processes ensuring 100% reliability for critical applications.
Our production lines maintain compliance under international regulatory standards. We strictly monitor environmental impact, worker safety, and product safety across our supply chain, ensuring compliance with API 6D, API 607, CE, ISO 9001, ISO 14001, ISO 18001, and TS specifications.
Utilizing automatic vision inspection systems, CNC 3D coordinate measuring machines (CMMs), and laser micrometers to maintain dimensional accuracy within ±0.02mm.
Fluxmeters, gaussmeters, and 3D magnetic field mapping scanners ensure uniform field distribution, preventing hot spots or unexpected torque ripple in motor assemblies.
Highly Accelerated Stress Testing (HAST), thermal shock testing (-40°C to 150°C), and salt spray chamber testing are run routinely to verify coating integrity.
Technical questions concerning procurement, engineering design, and custom rare earth magnetic systems.
The maximum operating temperature is determined by the magnet's intrinsic coercivity ($H_{cj}$) and the permeance coefficient ($P_c$), which is dictated by the physical shape (L/D ratio). Standard N-grades begin losing strength at 80°C, while specialized AH grades with high $H_{cj}$ values can operate reliably up to 220°C.
Square block magnets provide flat contact faces, allowing them to seat directly against the linear stator back-iron. This layout maximizes physical contact area and minimizes air gap losses. Flat surfaces also simplify automated pick-and-place assembly, reducing manufacturing cycle times.
GBD is an advanced metallurgy technique where heavy rare earth elements like Dysprosium ($Dy$) or Terbium ($Tb$) are diffused selectively along the grain boundaries of sintered NdFeB instead of being mixed throughout the entire alloy. This dramatically increases intrinsic coercivity while reducing raw material consumption, yielding a highly cost-stable high-performance magnet.
We employ automatic vacuum-sintering ovens with precise closed-loop temperature controls, followed by automatic BH loop testing of samples from every batch. This ensures that key parameters such as Remanence ($B_r$), Coercivity ($H_c$), and Max Energy Product ($(BH)_{max}$) remain within a ±2% tolerance window across production runs.
Yes. For marine, subsea, or chemical processing applications, we offer specialty epoxy resins, Teflon coatings, and thin-film Parylene-C barriers. These coatings are verified using ISO 9227 salt spray testing to guarantee long-term protection against corrosion and degradation.
Explore our specialized magnet grades, shielded assemblies, and high-performance motor core segments.
Partner with Zhejiang Laysun Magnetics Ltd. to scale your industrial engineering projects. Our engineering team responds with detailed quotes and performance metrics within 24 hours.
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