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    ?????????? FERRITE MAGNET

Permanent Ferrite Magnets  

Hard ferrite (Ceramic) magnets take more than 75% of the world magnet production and have won wide acceptance due to their good resistance to demagnetization, excellent corrosion resistance and low price.

The chemical composition of magnets is iron oxide, barium and strontium elements. SrO-6(Fe2O3)or BaO-6(Fe2O3).    

The type size: Ring & Cylinder  DIA 5-220mm, Block 4-200mm, Segment (tile), ball of magnetic jewellery, Bar & Horseshoe Magnet.

It is the first choice for most types of speaker, DC motors, magnetic separators, MRI (magnetic resonance imaging) and automotive sensors. 


THE CHARACTERISTICS, US MMPA0100-90 STANDARDS.

Grade

Br
 (KGs)  

Hc
 (KOe)  

 Hci 
 (KOe)  

 (BH)max
(MGOe)

 Curie Temp.
(0C)

Max. Op. Temp
(0C)

Ceramic 1

2.2

1.86

3.25

1.10

450

300

Ceramic 5

3.8

2.4

2.5

1.1

450

300

Ceramic 7

3.4

3.25

4.0

2.75

450

300

Ceramic 8

3.85

2.95

3.20

3.5

450

300

Ceramic 10

4.2

2.95

3.05

4.2

450

300

THE CHARACTERISTICS, : IEC,TDK,SJ/T10410-93 STANDARDS.

NO: 

Y8T

Y20

Y22H

Y25

27H

Y28

Y30H-1

Y30H-2

Y32

Y33

  Br

mT

220

350

335

380

385

385

390

400

410

420

kG

2.2

3.5

3.35

3.8

3.85

3.85

3.9

4.0

 4.1

4.2

Hcj

kA/m

140

160

235

150

225

190

250

285

175

235

KOe

1.80

2.14

2.95

1.92

2.83

2.39

3.15

3.59

2.20

2.96

(BH)

max

KJ/m3

7.5

20

22

25

27

28

30

31

32

33

MGOe

1.0

2.5

2.7

3.2

3.4

3.5

3.6

3.7

4.0

4.2

NO:

IEC-

7/21

C5

IEC

20/28

ISM

PA320

TDK

FB3X

IEC

25/14

TDK

FB4B

TDK

FB5H

TDK

FB4A

TDK

FB4X

The Direction of Magnetization:

1) Axially magnetized orientation,     2) Radially magnetized through diameter,

3) Multiple pole magnetized  axially, 4) Multiple pole magnetized  radially.

 

Permanent Ferrite Magnet widely use for Speaker, Earphone, Telephone receiver.

1.General ring size:(OD x ID x T), Unit: mm

32x18x3

45x22x8

53x24x11

72x32x15

121x57x17

32x18x5

45x22x9

60x24x8

90x36x15

121x57x20

32x18x6

45x18x8

60x24x12

90x50x15

134x57x17

36x18x8

45x22x11

60x32x 10

90x36x17

155x57x20

39x22x6

49x28x8

60x32x12

100x57x17

184x60x20

40x22x8

49x30x8

72x32x10

100x57x20

220x60x20

2.Smaller ring size:(OD x ID x T) ,Unit: mm

12.4x7x2

16x7x5

21x7x5

23x10.5x3

25x13x7

12.2x4.1x3.8

13x7x2

20x7x3

29x16x5

30x6x4

14.5x9.3x3.5

17.5x7x3

19x11x2.2

27x17x3

27x12.5x5

3.Small cylinder size:(OD x T),Unit: mm

??6x2

??8x3

??15x3

??20x3

??12x12

??6.5x2

??10x5

??18x5

??25x4

??19x30

??7.5x3

??12x3

??12.5x4

??30x10

??55x10

 

Permanent NdFeB magnet for Speaker, Earphone, Telephone receiver, Microphone.

General Ring size (unit: mm)

Disk shape

Ø5x1.5

Ø6.5x1.5

Ø7.5x1.5

Ø7.5x0.5

Disk shape

Ø9.5x0.75

Ø9.5x1.5

Ø12.5x1.5

Ø12.5x2

Ring  shape

Ø6.5xØ2x1

Ø6.5xØ2x1.5

Ø13xØ7x1.5

Ø16xØ7x2

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