HRE-Free Neodymium

Introduction

HRE-Free (Heavy Rare Earth-Free) NdFeB magnets are a revolutionary material that dramatically increases coercivity without the use of expensive and scarce heavy rare earth elements like Dysprosium (Dy),Terbium (Tb),Gadolinium(Gd),Holmium (Ho). By leveraging advanced techniques such as grain refinement and grain boundary diffusion, these magnets maintain the high energy product of traditional NdFeB while solving the reliance on rare elements. This represents a significant breakthrough in both supply chain stability and cost efficiency.

The core of this technology lies in precisely controlling the microstructure of the powder metallurgy process. Through rapid quenching and specialized heat treatments, the internal grain structure of the magnet becomes finer and more uniform. This allows for outstanding coercivity and demagnetization resistance even without the addition of heavy rare earths. By eliminating the dependency on elements with volatile prices and concentrated supply chains, HRE-Free magnets are the ideal material for high-performance, commercially competitive applications.

The key advantages of these magnets are their supply chain resilience and high cost-performance ratio. They deliver magnetic properties comparable to traditional sintered neodymium magnets while effectively mitigating the cost risks associated with rare earth raw materials. This makes them perfectly suited for industries that demand a stable supply. With a working temperature range typically from 0°C to 150°C, they are the perfect solution for achieving lightweight, high-efficiency designs and controlling costs in consumer electronics, permanent magnet motors, and green energy technologies.

Features

• Diverse shapes and sizes, such as discs, rings, squares, sectors, tiles, irregular shapes, etc.
• Powerful magnetic properties
• High magnetic energy output
• High coercivity
• Excellent magnetic stability
• Surface coated for protection
• Designed for light, thin, short, and small products
• Common coatings: nickel-copper-nickel, blue-white zinc, colorful zinc, black epoxy

Operating Temperature

0°C～150°C

Applications

• Mobile phones
• Computers
• Wireless headphones
• Precision instruments
• Magnetic wrenches
• Magnetic copper sleeves
• Electric motors
• Motors
• Pneumatic tools
• Medical equipment
• Wind power generation
• Green energy products

HRE-Free Neodymium Product Performance Chart

* Dy free + Tb free +Gd free + Ho free, HRE content less than 0.1%

Advantages of HRE-Free Magnets

• • Reduced Cost and Supply Risk
  The prices and availability of medium and heavy rare earth elements fluctuate significantly, posing major challenges for large-scale manufacturers. HRE-Free magnets help reduce raw material costs and strengthen supply chain resilience.
• • Technological Breakthrough and Sustainability
  HRE-Free magnets represent a major advancement in materials science. They achieve high performance through smarter manufacturing and alloy design, rather than relying on scarce resources. This aligns with global trends toward sustainability and environmental responsibility.
• • Alignment with Global Industrial Trends
  Across global manufacturing, particularly in sectors such as electric vehicles and renewable energy ,companies are actively seeking solutions to reduce dependence on medium and heavy rare earth elements such as Dy and Tb. HRE-Free magnets have become a key technology driving this transition.

Key Technologies in HRE-Free Magnets

• To overcome the performance challenges associated with eliminating medium and heavy rare earth elements, materials scientists and engineering teams apply a range of advanced technologies to enhance magnetic performance:

• • • Grain Boundary Diffusion (GBD) Technology
    A core innovation that involves coating a small amount of rare earth or alloy on the surface of sintered magnets. Through controlled heat treatment process, these elements diffuse along grain boundaries, forming a high-coercivity “shell layer.” This method significantly enhances demagnetization resistance with minimal rare earth usage.
  • • Grain Refinement and Process Optimization
    By precisely controlling alloy composition and sintering parameters, the magnet achieves a finer and more uniform microstructure, resulting in enhanced overall thermal stability and coercivity.
  • • Innovative Alloy Design
    Researchers investigate and develop alternative elements or novel structural designs to fundamentally reduce dependence on Dysprosium (Dy), Terbium (Tb), Gadolinium (Gd), and Holmium (Ho).
    The application of these technologies enables HRE-Free magnets to maintain stable performance even in high-temperature environments, offering a broader selection of magnetic materials for diverse industries.
  • Note: Not all HRE-Free magnets are suitable for every application. Professional evaluation is essential to ensure successful integration.