Pictures of Sintered NdFeB ball magnet

Description of Sintered NdFeB ball magnet:
1) Rare Earth magnet has superior magnetic properties than other magnets
2) Higher unit magnetic properties
3) Smaller size and lighter weight in designing devices
4) Mostly an iron based alloy, NdFeB type rare earth magnet is much more prone to surface oxidation or rust, and elimination. Users should consider magnet coating,
plating or suitable surface treatment of Sintered NdFeB ball magnet:

Type	Information
Metallic	Zinc, Nickel, Nickel+Nickel, Copper+Nickel, Nickel+Copper+Nickel, Gold, Silver, Tin
Organic	Epoxy, Nickel+Epoxy coating
Temporary	Surface Pssivation

5) Less prone to chipping during handling
6) Lower temperature coefficient of magnetic properties than ceramic, higher than SmCo type rare earth magnet
7) Irreversible loss at high temperature
8) Types of Sintered NdFeB ball magnet: N30, N33, N35, N38, N40, N42, N30M, N33M, N35M, N38M, N40M, N27H, N30H, N33H, N35H, N37H, N27SH, N30SH, N33SH, N35SH, N25UH,   N28UH, N30UH, N35SH, N38, N45, N48, and N50
9) High energy ranging from 26MGOe to 54MGOe with wonderful coercive force
10) Less expensive, and mechanically stronger and less brittle than SmCo
11) Density: 7.5g/cm2
12) For most applications, coating or plating is recommended
13) Advantages:
     a) High energy
     b) Very high Hc and Hci output
     c) More economical than SmCo
     d) Wonderful performance at ambient temperature
14) Disadvantages:
     a) Working temperature is below 240^oC
     b) Prone to oxidation than other magnet alloys
15) Sintered NdFeB ball magnet Widely used in apparatus and instruments where a strong magnetic field is needed, including motors, sensors, microphones, electro-acoustics, magnetic separation,
magnetic suckers and magnetic therapy.