Explore our premium grade NdFeB magnets engineered for advanced industrial applications and consumer systems.
A National High-Tech Pioneer Specializing in High-Performance Rare Earth Neodymium Magnets Since 1999.
Founded at the turn of the millennium, Zhejiang Laysun Magnetics Ltd. has rapidly evolved from a visionary startup to an industry pacesetter. Our state-of-the-art factory, sprawling across 100,000 square meters in the vibrant city of Suining, Sichuan, is the heart of our operations. Here, our dedicated team of 300 employees works tirelessly to produce an impressive 5,000 tons of rare earth magnets annually.
We specialize in the research, development, production, and distribution of high-performance rare earth NdFeB magnets, serving critical sectors such as Electric Vehicles (EVs), industrial automation, wind power generation, automotive EPS, and consumer electronics.
State-of-the-art vacuum induction melting and sintering facilities that yield precise grain boundary structures, optimizing both magnetic density and stability.
Certified in ISO9001, ISO14001, and IATF 16949 standards, we enforce structural checks at every batch level, ensuring a defect rate measured in PPM.
From complex arc segments to multi-pole ring assemblies, we customize remnant magnetization values to meet strict system-level specifications.
A Technical Deep-Dive into Material Science, Sintering Thermodynamics, and Grain-Level Engineering.
Remnant magnetization (often denoted as Remanence or $B_r$) represents the residual magnetic flux density left within a magnetic material once the external magnetizing field has been completely removed. For engineers designing electric drive motors, actuator arrays, and sensor systems, $B_r$ directly corresponds to the magnetic strength and operational torque density of the motor. Maximizing $B_r$ without inducing premature demagnetization under thermal stress requires precise chemical formulations and microscopic structural control.
At the atomic scale, NdFeB magnets consist primarily of the tetragonal $\text{Nd}_2\text{Fe}_{14}\text{B}$ phase, which is highly magnetic, surrounded by a thin layer of a neodymium-rich grain boundary phase. The alignment of these grains during the compaction and sintering process determines the squareness of the hysteresis loop and the resulting $B_r$ value. As a premier OEM remnant magnetization supplier, we manage this balance by processing raw materials in high-purity nitrogen or argon environments to eliminate oxidation, which could degrade $B_r$.
“The optimization of Remnant Magnetization ($B_r$) is not merely a chemical recipe; it is a thermodynamic dance of grain orientation, densification rates, and grain boundary phase distribution.”
Traditionally, increasing intrinsic coercivity ($H_{cj}$) to prevent demagnetization at elevated temperatures required alloying the bulk material with heavy rare earth elements like Dysprosium (Dy) or Terbium (Tb). However, this bulk alloying method replaces Nd atoms within the main magnetic phase, causing a significant drop in the overall remnant magnetization ($B_r$).
To address this trade-off, Zhejiang Laysun Magnetics utilizes advanced Grain Boundary Diffusion (GBD) technology. By diffusing Dy or Tb along the grain boundaries after the sintering process, we enrich the boundaries with high-anisotropy phases without modifying the interior of the primary grains. This allows us to manufacture magnets with exceptionally high intrinsic coercivity ($H_{cj}$ up to 25-30 kOe) while maintaining a high remnant magnetization ($B_r$ > 1.4T).
High-performance NdFeB magnets are highly sensitive to oxidation and corrosion. To protect their structural integrity, we offer a variety of specialized surface treatments, including:
Aligning Procurement Demands with Supply Chain Resilience, Traceability, and Environmental Standards.
With rare earth minerals being highly geopolitical, global OEMs require suppliers with direct and stable sourcing of raw materials to mitigate price volatility.
Full compliance with RoHS, REACH, and global Conflict Mineral frameworks is essential for supply into the European Union and North American automotive markets.
Global procurement teams prioritize manufacturers utilizing energy-efficient processing systems and sustainable material sourcing models.
To meet these high market standards, Zhejiang Laysun Magnetics offers a comprehensive OEM program that begins at the raw material extraction stage and continues through vacuum induction melting, hydrogen decrepitation, jet milling, magnetic alignment, pressing, sintering, machining, and final coating. Every production lot is tracked using custom internal ERP identifiers, providing complete transparency and quality reports for every shipment.
Pioneering the Next Generation of Magnetic Materials for High-Efficiency Systems.
Developing sintered NdFeB magnets that achieve high thermal stability without relying on Heavy Rare Earth (HRE) elements like Dy or Tb. This reduces cost volatility and improves material sustainability.
Implementing next-generation magnetic alignment systems during pressing to orient grain structures more precisely. This increases the remnant magnetization ($B_r$) of standard NdFeB grades by 2-3%.
Partnering with Tier 1 automotive customers to recover and reprocess end-of-life magnetic materials, reducing carbon emissions and establishing a reliable circular supply chain.
Our facilities are fully certified to international standards to ensure reliable and consistent production.
Certified to ISO 9001 and IATF 16949 standards, ensuring rigorous control from raw material to finished product.
Complies with ISO 14001 guidelines to ensure low environmental impact and clean manufacturing processes.
Certified to ISO 45001 standards to maintain a safe, clean, and productive working environment.
Detailed technical answers to common queries regarding remnant magnetization, customization, and sourcing.
Discover our range of custom pot magnets, block arrays, cylinder magnets, and specialized assembly components.
Partner with Zhejiang Laysun Magnetics Ltd. to access high-performance rare earth magnetic solutions customized to your specific needs. Our engineers will reply with a detailed feasibility review and pricing estimate within 24 hours.
Laysun Magnetics
