1) Ndfeb arc or segment magnet has superior magnetic properties than othermagnets
2) Higher unit magnetic properties
3) Smaller size and lighterweight in designing devices
4) Mostly an iron based alloy, NdFeB type rareearth magnet is much more prone to surface oxidation or rust, and elimination.Users should consider magnet coating, plating or suitable surfacetreatment
5) Less prone to chipping during handling
6) Lower temperaturecoefficient of magnetic properties than ceramic, higher than SmCo type rareearth magnet
7) Irreversible loss at high temperature
8) Types: 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, andN50
9) High energy ranging from 8MGOe to 48MGOe with wonderful coerciveforce
10) Less expensive, and mechanically stronger and less brittle thanSmCo
11) Density: 13%, smaller than SmCo products
12) For mostapplications, coating or plating is recommended
13) Advantages:
a)High energy
b) Very high Hc and Hci output
c) More economicalthan SmCo
d) Wonderful performance at ambient temperature
2) Higher unit magnetic properties
3) Smaller size and lighterweight in designing devices
4) Mostly an iron based alloy, NdFeB type rareearth magnet is much more prone to surface oxidation or rust, and elimination.Users should consider magnet coating, plating or suitable surfacetreatment
5) Less prone to chipping during handling
6) Lower temperaturecoefficient of magnetic properties than ceramic, higher than SmCo type rareearth magnet
7) Irreversible loss at high temperature
8) Types: 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, andN50
9) High energy ranging from 8MGOe to 48MGOe with wonderful coerciveforce
10) Less expensive, and mechanically stronger and less brittle thanSmCo
11) Density: 13%, smaller than SmCo products
12) For mostapplications, coating or plating is recommended
13) Advantages:
a)High energy
b) Very high Hc and Hci output
c) More economicalthan SmCo
d) Wonderful performance at ambient temperature
e)Relatively low cost;
f)Poor resistance to corrosion andshould have a coating;
g)Very high strength;
h)Can replace SmComagnets.
f)Poor resistance to corrosion andshould have a coating;
g)Very high strength;
h)Can replace SmComagnets.
14) Disadvantages:
a) Working temperature is below2,000<sup>o</sup>C
b) Prone to oxidation than other magnetalloys
15) Widely used in apparatus and instruments where a strong magneticfield is needed,
including motors, sensors, microphones, electro-acoustics,magnetic separation,
magnetic suckers and magnetic therapy
