Neodymium-Iron-Boron Alloy, Neodymium Magnet, NdFeB Magnet

Neodymium-Iron-Boron Alloy, Neodymium Magnet, NdFeB Magnet

1. 🧪 Physical and Chemical Properties

• Appearance: Silvery-gray, metallic

• Density: ~7.5 g/cm³

• Melting Point: ~1350 °C

• Chemical Formula: Nd₂Fe₁₄B

• Magnetism: Extremely high (remanence ~1.3 Tesla)

• Oxidation: Rapid oxidation in humid air; protective coating required

• Reactivity: Unstable in acidic or moist environments

2. 🛠️ Broad Application Areas

• Electric vehicle (EV) motors

• Wind turbine generators

• Hard disk drives, speakers, microphones, headphones

• MRI machines and medical separators

• Defense: radar, missile guidance systems

• Robotics, drones, automation systems

• Magnetic separators, sensors, actuators

3. 🧾 Codes and Synonyms

• CAS No: 7440-00-8 (general for NdFeB alloy)

• EC No: Not assigned (treated as a mixture)

• Trade Names: NdFeB, Neo Magnet, Super Magnet

• HS Code / GTIP: 8505.11.00.00.00 (permanent magnets)

• REACH Status: Registered (varies by supplier)

4. 🔄 Alternatives / Equivalents

• Samarium-Cobalt (SmCo) – high thermal stability

• Ferrite magnets – low cost, lower performance

• Alnico – lower magnetism, high temperature tolerance

5. 📊 Sectoral Compatibility Table

6. 🗣️ Common Names

• Super magnet

• Neodymium magnet

• NdFeB magnet

• Magnetic powerhouse

7. 🏭 Production

• Produced by alloying neodymium oxide, iron, and boron via vacuum melting

• Pressed and sintered using powder metallurgy

• Surface protected with coatings (nickel, epoxy, etc.)

• Major producing countries: China, Japan, USA

• Key manufacturers: Hitachi Metals, JL MAG, Zhong Ke San Huan

8. 🎯 Mandatory Sectors and Processes

• Electric vehicle motors (no substitute)

• Wind turbine generators (efficiency-critical)

• Defense electronics (regulatory requirement)

• Medical MRI systems

• High-performance robotics and automation