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Certification:ISO 9001: 2008
Rare Earth Sintered Ndfeb Magnet Disc For Sensors Speakers
Quick Detail:
1.Density – 7.4-7.6 g/ cm3
2.Manufacturing process –sintering (most common), injection molding, and compression bonding.
3.Various shapes - blocks, bars, discs, rings, arc, segments, sectors, fan shape, cylinders, etc.
4.Prone to oxidation, plating is recommended ( Ni-CU-Ni, Zn,Au,Epoxy, etc)
Neodymium Magnets (Neodymium Iron Boron Magnets), also known as NdFeB or Neo magnets, are the most widely-used type of rare earth magnet. It is the strongest type of permanent magnet made from an alloy of Neodymium, Iron, and Boron with the Nd2Fe14B tetragonal crystalline structure. It has replaced other types of magnets in many applications in modern products that require strong permanent magnets, such as motors in cordless tools, hard disk drives, and magnetic fasteners.
|
Physical Properties of NdFeB Magnet |
|
|
Density(g/cm3) |
7.3-7.5 |
|
Curie Temperature (℃) |
320 |
|
Max. Operating Temperature (℃) |
220 |
|
Relative Permeability |
1.05 |
|
Flexural Strength (N/nm2) |
250 |
|
Compressive Strength (N/nm2) |
1100 |
|
Tensile Strength (N/nm2) |
75 |
|
Hardness (Hv) |
550-650 |
|
Temperature Coefficient of Br (%/℃) |
-0.09~-0.12 |
|
Temperature Coefficient of Hcj (%/℃) |
-0.50~-0.65 |
Applications:
Sensors and switches
Linear actuators
Microphone assemblies
Magnetic separators
DC and servo motors
Speaker Parts
Printers
Magnetic hooks
Computer rigid disc drives
Beam controls
Intelligent toys
MRI/NMR
Performance of Sintered Neodymium Magnets
|
Grade |
Residual Induction |
Coercive Force |
Intrinsic Coercive Force |
Maximum Energy Product |
Maximum Operating |
||||
|
(Br) |
(Hc) |
(Hci) |
(Bhmax) |
Temp. |
|||||
|
(G) |
(mT) |
(Oe) |
(kA/m) |
(kOe) min |
(kA/m) min |
(MGOe) |
(KJ/m3) |
(°C) |
|
|
N35 |
11700 |
1170 |
10900 |
868 |
12 |
955 |
35 |
279 |
80 |
|
N38 |
12200 |
1220 |
11300 |
899 |
12 |
955 |
38 |
303 |
80 |
|
N40 |
12500 |
1250 |
11400 |
907 |
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