Magnetic Materials Used In Our Magnet System

Update:08-03-2021
Summary:

  Neodymium Iron Boron (NdFeB)     An alloy made o […]

  Neodymium Iron Boron (NdFeB)

 

  An alloy made of neodymium, iron, boron and the compound Nd2Fe14B.

 

  NdFeB magnets are hard, but not fragile and will not be severely oxidized. This is why they are mostly plated with nickel or zinc. NdFeB magnets show a high energy density, so they can achieve high adhesion at the maximum. saturation. They can be used in a temperature range of -40°C to +200°C*.

 

  mar cobalt (SmCo)

 

  An alloy composed of rare earth metal sa (Sm) and metal cobalt (Co).

 

  Alloy structure

 

  SmCo5 (without iron)

 

  Sm2Co17 (20-25% iron content)

 

  These magnets are hard and fragile and can only be processed with diamond tools. They are expensive due to the high cobalt content. SmCo magnets are only slightly oxidized and exhibit good chemical resistance. Due to their high energy density (about 30-40% lower than NdFeB magnets), high adhesion can be obtained at maximum saturation. They can be used in a temperature range of -40°C to +350°C*. Small cracks in the magnetic material will not affect the force.

 

  AlNiCo

 

  An alloy composed of aluminum, iron, nickel, copper and cobalt. Permanent magnets are made using casting methods and techniques or sintering.

 

  Due to their magnetism, magnets made of AlNiCo must be very long in the magnetization direction in order to have good resistance to demagnetization as an open magnet. AlNiCo magnets have high heat resistance and can be used in a temperature range of -270°C to +450°C*.

 

  Hard ferrite (HF)

 

  Made of iron oxide and strontium carbonate.

 

  Strontium ferrite compound: SrFe12O19

 

  In contrast to rare-earth magnets, ferrites show a relatively low magnetic energy density. These raw materials are available in large quantities and are therefore cheap.

 

  As long as the original shape and function of the magnet are maintained, debris on sharp edges is acceptable. If chips are not accepted, they must be clearly specified. Small cracks in the magnetic material will not affect the force.

 

  Magnets made of hard ferrite can be isotropic (the elements are uniform in all directions -> lower adhesion) or anisotropic (the element components have a preferred direction -> higher adhesion Attached force). HF magnets can be used in a temperature range of -40°C to +250°C*.

 

  The material is hard and fragile and can only be processed with diamond tools. In addition, hard ferrites are not sensitive to oxidation and weather conditions. They also show good chemical resistance.

 

  However, the maximum operating temperature will vary and depends entirely on the actual alloy, application, bonding material, and magnet geometry. Please refer to our product catalog for precise details on the temperature range of the magnet system. You are also welcome to contact us in person.

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