The Global NdFeB Magnets by Grain Boundary Diffusion Process Market was valued at USD 2.8 billion in 2023 and is projected to reach USD 4.5 billion by 2030, growing at a Compound Annual Growth Rate (CAGR) of 6.8% during the forecast period (2023-2030). This growth is driven by surging demand from electric vehicle manufacturers, wind turbine producers, and high-efficiency motor applications where these advanced magnets enable superior performance with reduced rare earth content.

As industries worldwide prioritize energy efficiency and sustainable material usage, the Grain Boundary Diffusion (GBD) process has become a transformative technology in permanent magnet production. This report profiles the Top 10 Companies in the NdFeB Magnets by Grain Boundary Diffusion Process Industry—the technology innovators and production leaders revolutionizing magnetic materials.

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🔟 1. Hitachi Metals, Ltd.

Headquarters: Tokyo, Japan
Key Offering: NEOREC series GBD NdFeB magnets

Hitachi Metals dominates the high-performance magnet segment with its patented grain boundary diffusion technology that precisely controls rare earth element distribution. Their magnets deliver exceptional thermal stability up to 200°C with 30-50% less heavy rare earth usage.

Technology Advantages:

• Mass production capability for automotive applications
• Automated diffusion treatment for consistency
• End-to-end control from material to finished product

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9️⃣ 2. TDK Corporation

Headquarters: Tokyo, Japan
Key Offering: NEOREC series with multilayer GBD technology

TDK’s advanced grain boundary diffusion process creates magnets that maintain performance across wide temperature ranges, making them ideal for EV drivetrains and industrial motor applications.

Technology Advantages:

• High-throughput automated production
• Integrated surface treatment capabilities
• Custom formulations for specific applications

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8️⃣ 3. Proterial, Ltd. (formerly Hitachi Metals)

Headquarters: Tokyo, Japan
Key Offering: NeoDiffusion® GBD magnets

Proterial has commercialized grain boundary diffusion technology at scale, serving major automotive OEMs worldwide with magnets that reduce dysprosium usage by 30-40% while maintaining high coercivity.

Technology Advantages:

• Pioneer in selective grain boundary enrichment
• Global production network
• Automotive-grade quality systems

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7️⃣ 4. Vacuumschmelze GmbH & Co. KG

Headquarters: Hanau, Germany
Key Offering: Vacodym and Vacomax GBD magnet series

This German specialty materials company offers some of the most advanced grain boundary diffusion processed magnets, with applications ranging from medical devices to aerospace systems.

Technology Advantages:

• Vertically integrated production
• Custom diffusion profiles
• Military and medical certifications

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Global NdFeB Magnets by Grain Boundary Diffusion Process Market – View in Detailed Research Report

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6️⃣ 5. JL MAG Rare-Earth Co., Ltd.

Headquarters: Ganzhou, China
Key Offering: High-performance GBD magnets

As China’s largest rare earth magnet producer, JL MAG has implemented grain boundary diffusion technology across its massive production capacity, supplying global automotive and industrial customers.

Technology Advantages:

• 20,000+ ton annual capacity
• Cost-effective volume production
• Complete supply chain integration

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5️⃣ 6. Zhong Ke San Huan Hi-Tech Co., Ltd.

Headquarters: Beijing, China
Key Offering: SH series GBD magnets

This Chinese research-led company specializes in high-end applications, with grain boundary diffusion technology enabling operation at temperatures up to 220°C while minimizing rare earth content.

Technology Advantages:

• Aerospace and defense applications
• Plasma-assisted diffusion processes
• R&D collaborations with academic institutions

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4️⃣ 7. Ningbo Yunsheng Co., Ltd.

Headquarters: Ningbo, China
Key Offering: YSM GBD magnet series

Ningbo Yunsheng has developed industrial production lines for grain boundary diffusion processed magnets, achieving 40-60% heavy rare earth reductions while preserving magnetic performance.

Technology Advantages:

• Specialization in large magnets
• Automated quality control systems
• Wind turbine and industrial motor focus

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3️⃣ 8. Advanced Technology & Materials Co., Ltd.

Headquarters: Beijing, China
Key Offering: AT&M GBD series

This state-affiliated enterprise leverages national research resources to develop next-generation grain boundary diffusion technologies for demanding industrial and energy applications.

Technology Advantages:

• National laboratory backing
• Complete rare earth supply chain
• High-coercivity formulations

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2️⃣ 9. Shin-Etsu Chemical Co., Ltd.

Headquarters: Tokyo, Japan
Key Offering: High-precision GBD magnets

Shin-Etsu combines its rare earth expertise with precision manufacturing to produce grain boundary diffusion magnets with exceptionally consistent properties for demanding electronics applications.

Technology Advantages:

• Ultra-low inclusion rates
• Precision diffusion control
• Microscopic homogeneity

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Global NdFeB Magnets by Grain Boundary Diffusion Process Market – View in Detailed Research Report

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1️⃣ 10. Earth-Panda Advanced Magnetic Material Co., Ltd.

Headquarters: Wuhan, China
Key Offering: GreenMag eco-friendly GBD magnets

Earth-Panda focuses on sustainable production of grain boundary diffusion magnets, with closed-loop systems that minimize environmental impact while delivering technical performance comparable to conventional high-coercivity magnets.

Technology Advantages:

• Recycling of diffusion materials
• Reduced carbon footprint processes
• Circular production approach

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🔋 Outlook: The Future of GBD Magnets—Smarter, Leaner, Greener

The NdFeB magnet market continues to evolve rapidly as grain boundary diffusion technology enables higher performance from fewer critical materials. This revolution comes at a crucial time as industries transition to more sustainable production methods.

📈 Key Market Trends:

• Increasing adoption in EV traction motors and wind generators
• Development of automated high-volume diffusion systems
• Tighter integration with protective surface treatments
• Strategic partnerships between magnet producers and OEMs

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Global NdFeB Magnets by Grain Boundary Diffusion Process Market – View in Detailed Research Report

The companies profiled above represent the vanguard of magnetic material innovation—developing advanced solutions that will power cleaner energy systems and more efficient mobility for years to come.