NdFeB magnets can be divided into bonded NdFeB and sintered NdFeB. Meank Magnetics tells you the difference between the two from the following aspects
Ingredient: bonded ndfeb contain less neodymium and more iron,bonded neodymium magnets containing PPS or PA or epoxy.
Technology: bonded NdFeB is made from NdFeB magnetic powder with binder.In fact,bonding is injection molding. Sintered neodymium magnet is formed by vacuum heating at high temperature.Sintered NdFeB magnet material adopts powder metallurgy technology.
Structure: sintered neodymium magnets are crystal structure and bonded neodymium magnets are non-crystal structure.
Performance: sintered neodymium magnet is much higher, about four times higher than bonded neodymium magnet.
Characteristics: bonded NdFeB magnets are suitable for some thin, small, special-shaped products.Such as thin-walled motor ring
| Feature | Bonded NdFeB | Sintered NdFeB |
| Ingredients | Less neodymium, more iron, with binder (PPS, PA, or epoxy) | Mostly neodymium and iron |
| Technology | Injection molding of NdFeB powder with binder | Powder metallurgy: pressing, vacuum heating, sintering |
| Structure | Non-crystalline | Crystalline |
| Performance | Lower magnetic strength (about 4x less) | Higher magnetic strength |
| Characteristics | Suitable for thin, small, and complex shapes | More brittle, good for high-performance applications |
| Examples | Thin-walled motor rings | Motors, speakers, sensors, MRI machines |
Welcome you contact us for more information about bonded NdFeB and sintered NdFeB.
