Classification & Comparison of Permanent Magnets 20141226
NdFeB, SmCo, AlNiCo, Ferrite Magnets Manufacturer – China Rare Earth Magnet Limited
What we call magnets refer to permanent magnets generally.
Permanent magnets fall into four categories.
1. Sintered Neodymium Magnets: With the top commercial characteristics presently found among magnets, extremely strong magnetic performance and biggest BH max which ten times higher than ferrite material’s, it owns pretty good machining property. Its max working temperature can be as high as 200°C, texture is hard and dense. Performance is high and stable, so extensively used in various industries as good cost effectiveness. It must be plated coatings such as Ni, Zn on surface because of very active chemical principle.
2. Sintered SmCo : A kind of quite superior permanent magnet material, achieves super high magnetic property, nice feature of corrosion and oxidation resistance, small temperature coefficient, mostly used on motors, sensors, detecting instruments, radars and other high-tech. fields.
3. AlNiCo: Applicable for producing small, thin, lightweight and intricately shaped magnets, popular in the areas such as instruments, telecommunications, magneto-electric switch and sorts of sensors.
4. Ferrite: The main raw material is BaFe12O19 and SrFe12O19. Made as ceramic manufacturing process, it’s hard and brittle, is the most widely used permanent magnets on account of very good heat-resistance, cheap price and moderate properties.
AlNiCo is an alloy consists of Al, Ni, Co, Fe and other microelements, can be made in many different complex shapes and sizes. Thanks to the min. reversible temperature coefficient, the max working temperature of Cast AlNiCo is up to over 600°C.
SmCo is classified according to different components as SmCo5 and Sm2Co17. In consequence of the high costs of raw material, its development is limited. However, owning relative strong BH max and good temperature characteristics, compared with Sintered NdFeB, it works better in high temperatures.
What we call magnets refer to permanent magnets generally.
Permanent magnets fall into four categories.
1. Sintered Neodymium Magnets: With the top commercial characteristics presently found among magnets, extremely strong magnetic performance and biggest BH max which ten times higher than ferrite material’s, it owns pretty good machining property. Its max working temperature can be as high as 200°C, texture is hard and dense. Performance is high and stable, so extensively used in various industries as good cost effectiveness. It must be plated coatings such as Ni, Zn on surface because of very active chemical principle.
2. Sintered SmCo : A kind of quite superior permanent magnet material, achieves super high magnetic property, nice feature of corrosion and oxidation resistance, small temperature coefficient, mostly used on motors, sensors, detecting instruments, radars and other high-tech. fields.
3. AlNiCo: Applicable for producing small, thin, lightweight and intricately shaped magnets, popular in the areas such as instruments, telecommunications, magneto-electric switch and sorts of sensors.
4. Ferrite: The main raw material is BaFe12O19 and SrFe12O19. Made as ceramic manufacturing process, it’s hard and brittle, is the most widely used permanent magnets on account of very good heat-resistance, cheap price and moderate properties.
AlNiCo is an alloy consists of Al, Ni, Co, Fe and other microelements, can be made in many different complex shapes and sizes. Thanks to the min. reversible temperature coefficient, the max working temperature of Cast AlNiCo is up to over 600°C.
SmCo is classified according to different components as SmCo5 and Sm2Co17. In consequence of the high costs of raw material, its development is limited. However, owning relative strong BH max and good temperature characteristics, compared with Sintered NdFeB, it works better in high temperatures.
