Engineered with Precision & Advanced Coating Technologies directly from our Chinese Factory Floor
To answer what a high-quality permanent magnet is made of, we must investigate the microscopic structural engineering of materials. Modern industrial permanent magnets, particularly Neodymium-Iron-Boron (NdFeB), are complex alloy systems engineered to maintain an intense, long-lasting external magnetic field even when exposed to demanding temperatures and high demagnetizing factors.
At the molecular scale, a premium sintered Neodymium magnet is composed of a intermetallic tetragonal crystalline phase represented by the chemical formula Nd2Fe14B. Let's break down the composition and structural elements:
A National High-Tech Pioneer in Rare Earth Permanent Magnet Innovation Since 1999
Founded at the turn of the millennium, Zhejiang Laysun Magnetics Ltd. has rapidly evolved from a visionary startup into a recognized global industry pacesetter. Our state-of-the-art production factory, sprawling across a massive 100,000 square meters in Suining, Sichuan, is equipped with vacuum induction melting (VIM) furnaces, strip-casting lines, high-pressure hydrogen decrepitation systems, jet mills, and fully automated nitrogen-protected compaction presses.
Our expert workforce of over 300 experienced professionals generates an impressive annual output of 5,000 tons of high-performance rare earth NdFeB magnets. Headquartered strategically in Hangzhou, China, Laysun maintains extensive sales, logistics, and technical application departments to service global markets including North America, Europe, Japan, and Southeast Asia.
Why Tier-1 Industrial OEMs and Automotive Supply Chains Partner with Us
The global landscape for permanent magnet materials is experiencing a profound transition driven by the green energy transition, electrification of vehicles, and high-degree automation. As a leading manufacturer and exporter, Zhejiang Laysun Magnetics stands at the intersection of material sciences and high-volume industrial processing. Understanding the chemical and physical characteristics of permanent magnets is essential for engineers design-in premium performance.
Permanent magnets are primarily manufactured via two distinct metallurgical pathways, each producing properties suited to specific target applications:
Due to the scarcity and cost volatility of Heavy Rare Earth Elements (HREE) like Dysprosium (Dy) and Terbium (Tb), Laysun Magnetics has pioneered Grain Boundary Diffusion (GBD) technology. Instead of adding Dy/Tb to the master melt, we apply HREE layers directly onto the sintered magnet surfaces. During a targeted secondary heat treatment, the heavy rare earths diffuse along the grain boundary junctions of the Nd2Fe14B crystal matrix.
By concentrating Dy/Tb strictly where demagnetization factors are strongest (at the grain borders) rather than within the crystal cores, we increase intrinsic coercivity ($H_{cj}$) without sacrificing remanent magnetization ($B_r$). This technology enables the manufacturing of lightweight, temperature-resistant magnets for electric drivetrains and automotive EPS motors while minimizing critical material dependencies.
A fundamental challenge for NdFeB alloys is their vulnerability to oxidation due to the high iron content and the presence of a highly reactive, neodymium-rich grain boundary phase. At Zhejiang Laysun Magnetics, we utilize state-of-the-art electroplating and chemical deposition techniques to ensure decades-long service lives:
Provides superior mechanical robustness and acts as a barrier in general atmospheric environments. The triple layer minimizes pinholes and prevents galvanic corrosion.
Best for high-humidity, marine, and acidic environments. Delivers electrical isolation and high salt-spray resistance (up to 48-72 hours standard, or customized up to 500 hours).
Ideal for automotive applications where compatibility with performance adhesives is critical. Highly effective for high-volume automated manufacturing assembly lines.
Enabling the Next Wave of Global Technological Advancements
Sintered NdFeB block magnets with high thermal resistance (SH, UH, EH grades) form the magnetic core of traction motors and auxiliary components, delivering continuous torque under high load.
Servo motors and outrunners require precise torque-to-weight ratios. Our custom thin-walled ring magnets and arc segment assemblies enable ultra-compact joints and high power densities.
Voice Coil Motors (VCM) for auto-focus camera modules and ring configurations for smartphone magnetic attachments require tight dimensional tolerances (+/-0.01mm) and stable magnetic flux.
Our geographical distribution leverages China’s premier industrial zones. By basing our corporate headquarters in Hangzhou, Zhejiang, we gain direct access to international commercial logistics, deep-water ocean ports (Shanghai and Ningbo), and a hub of engineering talent.
Simultaneously, our large-scale 100,000 m² primary production facility in Suining, Sichuan, positions us adjacent to critical mineral refinement zones, stabilizing raw material costs and ensuring uninterrupted production capacities.
Our logistical systems support sea, air, and multi-modal transport configurations. Whether shipping custom container-loads to Europe via the China-Europe Railway Express or flying urgent prototypes via express air cargo, we manage the customs, documentation, and protective packaging requirements.
Verifiable industrial standards ensuring reliability across high-stakes engineering applications
Technical guidance from Laysun Magnetics' Lead Materials Engineers
Corrosion-Resistant Industrial Assemblies and High-Flux Ring Geometries
Whether you require deep simulation files for a new electrical drivetrain or an OEM quotation for voice coil motor components, our team will respond within 24 hours with exact specifications, lead times, and pricing models.
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Laysun Magnetics