Magnet raw material
Presintered Ferrite Powder
Bonded Ferrite Powder
Dry Pressing Ferrite powder
Wet pressing ferrite powder
MnZn Ferrite powder
Alnico powder
Neodymium(NdFeB) powder
Magnet assembly
Flexible magnet
Magnets
Sinterde Neodymium(NdFeB)
Bonded Neodymium(NdFeB)
Sintered Ferrite
Bonded ferrite
Sintered Alnico
Cast Alnico
Samarium Cobalt
Bonded Alnico
Magnet Coating
Magnet shapes
Sinterde Neodymium(NdFeB)  
Sintered NdFeB offers the higher magnetic properties (33 MGOe to 51 MGOe) than Bonded NdFeB., and has good resistance to external demagnetization fields because of its high Intrinsic Coercive Force (Hci) .because of low anticorrosion properties, its surface is usually treated with some special methods. (include Zine Nickel Tin Silver Gold plating Phosphor and Spray Epoxy Resin etc).

1.Manufacture process:

Sintered Nd-Fe-B permanent magnets are made with several steps. At first, a Nd-Fe-B alloy is formulated based on the properties of final permanent magnets supposed to reach. The alloy is produced in a vacuum furnace. Then the alloy is crushed into a powder form. Sintered Nd-Fe-B permanent magnets are formed by powder metallurgical process. These magnets can be die pressed or isostatically pressed. During the pressing process, magnetic fields are applied with assistance of specially designed fixture to align magnetic "domains" and optimize the magnetic performance of these magnets. Then pressed magnets are placed into a furnace under protective atmosphere for sintering. After sintering the magnet shape is rough, and need to be machined and ground to achieve desired shape and size.

2.Typical propertise of Sintered NdFeB magnet

TYPE

Remanence

Br

Coercive-force

bHc

Intrinsic coercive force iHc

Max. energy product

(BH) max

Working Temperature

KGs

T

KOe

KA/m

KOe

KA/m

MGOe

KJ/m 3

Tc

N-30

10.8-11.2

1.08-1.12

9.8-10.5

780-836

12

955

28-30

223-239

80

N-33

11.4-11.7

1.14-1.17

10.5-11.0

836-876

12

955

31-33

247-263

80

N-35

11.7-12.1

1.17-1.21

10.8-11.5

860-915

12

955

33-35

263-279

80

N-36

11.9-12.2

1.19-1.22

10.8-11.5

860-915

12

955

34-36

271-287

80

N-38

12.2-12.6

1.22-1.26

10.8-11.5

860-915

12

955

36-38

287-303

80

N-40

12.6-12.9

1.26-1.29

10.5-11.0

836-876

12

955

38-40

303-318

80

N-42

12.9-13.2

1.29-1.32

10.5-11.0

836-876

12

955

40-42

318-334

80

N-43

13.0-13.3

1.30-1.33

10.5-11.0

836-876

12

955

41-43

326-342

80

N-45

13.3-13.7

1.33-1.37

10.5-11.0

836-876

12

965

43-45

342-358

80

N-48

13.8-14.2

1.38-1.42

11.6

923

12

876

46-49

366-390

80

N-50

14.0-14.5

1.40-1.45

10.0

796

11

876

48-51

382-406

60

N-52

14.3-14.8

1.43-1.48

10.0

796

11

876

50-53

398-422

60

N-27M

10.2-10.6

1.02-1.06

9.6-10.1

764-804

15

1194

25-27

199-215

100

N-30M

10.8-11.2

1.08-1.12

10.1-10.6

804-844

15

1194

28-30

223-239

100

N-33M

11.4-11.7

1.14-1.17

10.5-11.0

844-884

15

1194

31-33

247-263

100

N-35M

11.7-12.1

1.17-1.21

10.8-11.5

860-915

15

1114

33-35

263-279

100

N-36M

11.9-12.2

1.19-1.22

11.1-11.6

884-923

15

1194

34-36

271-287

100

N-38M

12.2-12.6

1.22-1.26

10.8-11.5

860-915

14

1114

36-38

287-303

100

N-40M

12.6-12.9

1.26-1.29

10.8-11.5

860-915

14

1114

38-40

303-318

100

N-42M

12.9-13.2

1.29-1.32

10.8-11.4

860-907

14

1114

40-42

318-334

100

N45M

13.3-13.7

1.33-1.37

10.8-11.4

860-907

17

1114

43-45

334-358

100

N-27H

10.2-10.6

1.02-1.06

9.6-10.1

764-804

17

1353

25-27

199-215

120

N-30H

10.8-11.2

1.08-1.12

10.1-10.6

804-844

17

1353

28-30

223-239

120

N-33H

11.4-11.7

1.14-1.17

10.6-11.1

844-884

17

1353

31-33

247-263

120

N-35H

11.7-12.1

1.17-1.21

10.8-11.5

860-915

17

1353

33-35

263-279

120

N-36H

11.9-12.2

1.19-1.22

11.1-11.6

884-923

17

1353

34-36

271-287

120

N-38H

12.2-12.6

1.22-1.26

11.5-12.0

915-955

17

1353

36-38

287-303

120

N-40H

12.6-12.9

1.26-1.29

11.5-12.0

915-955

17

1353

38-40

303-318

120

N-42H

12.9-13.2

1.29-1.32

11.5-12.0

915-955

17

1353

40-42

318-334

120

N-27SH

10.2-10.6

1.02-1.06

9.6-10.1

764-804

20

1592

25-27

199-215

150

N-30SH

10.8-11.2

1.08-1.12

10.1-10.6

804-844

20

1592

28-30

223-239

150

N-33SH

11.4-11.7

11.4-11.7

10.6-11.1

844-884

20

1592

31-33

247-263

150

N-35SH

11.7-12.1

1.17-1.21

10.8-11.5

860-915

20

1595

33-35

263-279

150

N-38SH

12.1-12.5

1.21-1.25

10.8-11.5

860-915

20

1592

36-38

287-302

150

N-40SH

12.6-12.9

1.26-1.29

10.8-11.5

860-915

20

1592

38-40

303-318

150

N25UH

9.8-10.2

0.98-1.02

9.2-9.6

732-764

25

1990

23-25

183-199

180

N28UH

10.4-10.8

1.04-1.08

9.8-10.2

780-812

25

1990

26-28

207-223

180

N30UH

10.8-11.2

1.08-1.12

10.1-10.6

804-844

25

1990

28-30

223-239

180

N35UH

11.7-12.1

1.17-1.21

10.5-11.2

836-890

25

1989

33-35

263-278

180

N25EH

9.8-10.2

0.98-1.02

9.2-9.6

732-764

30

2387

23-25

183-199

200

N28EH

10.4-10.8

1.04-1.08

9.8-10.2

780-812

30

2387

26-28

207-223

200

N30EH

10.8-11.2

1.08-1.12

10.1-10.6

804-844

30

2387

28-30

223-239

200

Physical properties of Sintered NdFeB

Coating of NdFeB more details, please click here.

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