NdFeB Sintered
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Tel:
+86-574-27818391, 27818389, 87169162, 87169161
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Alisa, Annie (English)
ӧԧ֧ߧڧ_ѧ(ܧڧ ٧) Mol.:
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Neodymium permanent magnets are strong magnets which consist of neodymium, iron, boron and a few transition metals. These magnets have metallic appearance and are found in simple shapes like rings, blocks and discs. The neodymium rare earth magnets are strong magnetically and are brittle in nature hence they must be handled with care. Since it is amenable to chipping and cracking it can be only be abrasively ground and that too along with the coolant. Due to their low cost they have successfully replaced heat resistant and marginally weaker magnets in various industrial applications.

Features of Sintered NdFeb Magnets

  • Extreme strong Br Resident induction.
  • Excellent demagnetization resistance capability
  • Good Price relative to its high magnetic properties.
  • Neodymium rare earth is prone to corrosion hence should be coated for long term maximum energy output.

Surface Protection and coatings

Surface

Type

Minimal layer thickness

Surface Color

Remarks

Passivation

 

<=1

Silver grey

Temperary Protection

Nickel coating

Ni+Ni

10-20

Silver semibright

Excellent resistance to humid atmosphere

Ni+Cu+Ni

Superior resistance to humid atmosphere

Zinc coating

Zn

8-20

Blue whiteshining color shining

Good resistance to salt spray

C-Zn

Excellent resistance to salt spray

Tin coating

Ni+Cu+Sn

15-20

Silver semibright

Superior resistance to humid atmosphere

Gold coating

Ni+Cu+Au

10-20

Gold shining

Superior resistance to humid atmosphere

Cupper coating

Ni+Cu

10-20

Gold shining

Temporary treatment

Epoxy

Ni+Cu+Epoxy

15-25

Black

Excellent climatic and salt spray resistance

Zn+Epoxy

Chemical Coating

Ni

10-20

Silver semibright

Excellent resistance to humid atmosphere


Applications

The applications of the neodymium rare earth magnets are:

  • They are used for stabilization and angular head motors in computer hard drives.
  • They are also applicable in various earphones and headphones.
  • Neodymium magnets have usage in various other industrial products like:
    • Magnetic separators.
    • Linear actuators.
    • Microphone assemblies.
    • DC motors.
    • Printers.
    • Speakers.
Food Processing Industries etc.

 

 

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