High-performance permanent magnets calibrated for advanced electronics, micro-actuators, automotive EPS, and industrial applications.
Sintered Neodymium-Iron-Boron (NdFeB) represents the pinnacle of modern permanent magnetic materials, exhibiting the highest maximum energy product $(BH)_{max}$ available globally. For applications requiring small round neodymium magnets (often classified as disc, cylinder, or micro-ring magnets), geometric optimization is critical. The magnetic circuit performance of these small structures is governed by the length-to-diameter ($L/D$) ratio, which directly determines the operating slope on the demagnetization curve ($B-H$ curve).
When designing custom disc magnets for compact applications, engineering factors such as temperature-induced demagnetization coefficient, surface magnetic flux density ($B_r$), and intrinsic coercive force ($H_{cj}$) must be calculated dynamically. For example, a standard N35 grade magnet might suffice at ambient room temperature, but if your product operates in high-temperature environments (up to 200°C), transitioning to grades like 38EH or 35AH is necessary to avoid permanent magnetic decay.
Furthermore, the surface coating of round neodymium magnets is vital to prevent oxidation. Standard options include Nickel-Copper-Nickel (Ni-Cu-Ni), Epoxy, Zinc, and advanced coatings such as Parylene or Gold for medical device applications.
Established in 1999, we have transitioned from a specialized rare earth research workshop into a leading national high-tech enterprise.
Years Experience
Factory Area (m²)
Expert Personnel
Annual Output (Tons)
Our state-of-the-art manufacturing facility, located in the Suining Industrial Cluster, Sichuan, spans 100,000 square meters. This facility manages every phase of production, from raw rare earth vacuum melting, strip casting, and jet milling, to orientation pressing, sintering, machining, and plating.
With Hangzhou as our global commercial headquarters, Laysun Magnetics manages a supply chain that exports custom neodymium magnets worldwide. We service tiers in the electric vehicle (EV) automotive supply chain, aerospace actuators, wind power generators, and medical technology sectors.
Understanding how macro industrial demands shape micro-magnetic engineering and raw material science.
As consumer electronics, medical implants, and sensor suites decrease in volume, the need for sub-millimeter scale neodymium discs has expanded. These micro-magnets require high magnetic uniformity to prevent drift in sensitive electronics.
Reducing dependence on heavy rare earths (HRE) such as Dysprosium (Dy) and Terbium (Tb) is a priority. GBD technology deposits HRE directly onto the sintered magnet's grain boundaries, increasing thermal stability while minimizing raw material costs.
Decarbonization drives demand for sintered NdFeB. From direct-drive wind turbines to auxiliary electric vehicle motors, high-energy-density round and segmented magnets are replacing older induction and ferrite magnetic arrays.
For global industrial buyers, China’s industrial ecosystem provides end-to-end integration of the rare earth magnet supply chain. This process ranges from upstream mining and extraction to high-precision machining. Zhejiang Laysun Magnetics Ltd. leverages Sichuan's regional raw material reserves, insulating buyers from the pricing volatility common in fragmented supply chains.
Our Factory 4.0 transformation integrates automated inspection systems at every critical stage. Using oxygen content analyzers, laser diffraction particle size testers, and automated optical scanners for surface defects, we maintain tight geometric tolerances (down to ±0.01 mm for small round magnets).
This technological framework minimizes batch-to-batch variance in magnetic characteristics, including remanence ($B_r$) and coercive force ($H_{cb}$), ensuring stable performance in high-speed automated assembly lines.
Refining rare earth elements into NdFeB alloys with precise stoichiometry to prevent structural defects.
Pulverizing the alloy into 3-5 micron monocrystalline particles under an inert gas blanket to avoid oxidation.
Aligning the microscopic domains in a magnetic field exceeding 1.5 Tesla before mechanical compression.
Consolidating the compressed block at temperatures above 1000°C, followed by multi-stage tempering cycles.
Explore our custom specifications, coatings, and geometries developed for specialized industrial applications.
From micro-actuators in drones to structural drivetrains in electric vehicles.
Operating a 5000-ton capacity factory requires comprehensive quality assurance (QA) frameworks. Zhejiang Laysun Magnetics maintains compliance certifications including API 6D, API 607, CE, ISO9001, ISO14001, and ISO18001 (OHSAS).
Our quality control protocols test mechanical integrity alongside magnetic properties. All customized batches undergo environmental stresses: Salt Spray Testing (up to 48 hours for standard Ni-Cu-Ni, or over 1000 hours for specialized coatings like Epoxy/Parylene), Highly Accelerated Stress Test (HAST), and Pressure Cooker Testing (PCT).
Our Hangzhou headquarters serves as our global commercial and logistical hub, coordinate shipping operations via air freight or maritime transport from major ports in Shanghai and Ningbo to secure global delivery schedules.
High-performance permanent magnets calibrated for advanced electronics, micro-actuators, automotive EPS, and industrial applications.
Technical information on engineering properties, customization parameters, and supply chain logistics for permanent neodymium magnets.
Zhejiang Laysun Magnetics Ltd. provides customized NdFeB solutions for automotive, industrial, and consumer electronics applications. Our engineering team is available to assist with magnetic modeling, alloy selection, and prototyping. Contact us to receive a technical quote and comprehensive price list within 24 hours.
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Laysun Magnetics