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Ferrite Magnets

Ferrite Magnets

Ferrite Magnets
CategoriesFerrite Magnets
AlbumView larger image
BrandCINFER
MaterialSintered Ferrite Magnets
ShapeMain Disc, but Block or Rectangular or Cuboid, Ring, Cylinder, Arc and Irregular shape are also available
Magnetized directionAxially or Diametrical Magnetized, but Thickness, Multipoles and Radial magnetization are also available
CertificateISO/TS 16949, ISO9001, ISO14001, RoHS, REACH
PackingStandard sea or air packing, such as carton, wooden box, pallet etc.
Transportationcourier (TNT, DHL, FedEx, UPS), air or sea.
Update Time2019-10-23
Detail Information

Since the 1950s, hard ferrite (ceramic) magnets have been widely applied because of low cost, good magnetic properties and excellent environmental stability. Both isotropic and anisotropic hard ferrite magnets are available for Cinfer. The magnetic energy products of anisotropic hard ferrite magnets are higher than that of the isotropic hard ferrite magents by up to 300%. Depending on the base materials, there are Barium Ferrite and Strontium Ferrite with higher coercive. After preliminary inspection, the raw materials (mainly iron oxide, strontium carbonate) are weighed, blended, pre-sintered and milled to fine powders with hexagonal crystals. For isotropic magnets, the pre-materials are milled to powders and then pressed. For anisotropic magnets there are two procedures in the production, dry press and wet press. Firstly, the raw materials are dried and then pressed in a magnetic field. Secondly, the raw materials are wet pressed under the influence of a magnetic field, then followed by sintering, finishing cleaning and magnetization. Finally the surface can be machined, marked, magnetized or coated according to customers' requirements.

Ceramic magnets are very hard and brittle, consequently machining must be done with a diamond wheel, and is easier when done prior to magnetization. Standard tolerances for ceramic magnet dimensions are +/-.005″ for ground dimensions and +/- 2% of feature size for dimensions. Because of their brittleness these magnets will not withstand impact or flexing. We recommend that they not be used for structural purposes.Ceramic magnets are chemically inert non-conductors, which is a benefit in many applications according to different grade as below

Maximum operating temperature for a ceramic magnet is 250°C. Although you will experience magnetic losses when operating at elevated temperatures, the losses are recovered when the material is brought down to normal ambient temperature. However, operating in very cold temperatures (-20°C) can result in permanent losses of magnetic strength unless the circuit has been designed for such extremes.

Pros:

1. least expensive material compared to alnico magnets or rare earth magnets

2. High intrinsic coercive force

3. Corrosion resistance 

烧结铁氧体性能表

 

Sintered Hard Ferrite Magnetic Property Table

牌号

Grade

剩磁 Br

Residual Induction

磁感矫顽力 HcB

Coercive Force

内禀矫顽力 Hcj

Intrinsic Coercive Force

最大磁能积 (BH)max

Maximum Energy Products

Other Equivalent (Reference Only)

mT

kGs

KA/m

KOe

KA/m

KOe

KJ/m3

MGOe

 

min

 

max

min

 

max

min

max

min

 

max

min

max

min

 

max

min

 

max

min

 

max

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y8T

200

 

235

2.00

 

2.35

125

160

1.57

 

2.01

210

280

2.64

 

3.51

6.50

 

9.50

0.80

 

1.20

HF8/22, C1, FB1A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y22H

310

 

360

3.10

 

3.60

220

250

2.76

 

3.14

280

320

3.51

 

4.02

20.00

 

24.00

2.50

 

3.00

HF20/28

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y25

360

 

400

3.60

 

4.00

135

170

1.70

 

2.14

140

200

1.76

 

2.51

22.50

 

28.00

2.80

 

3.50

HF25/14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y26H-1

360

 

390

3.60

 

3.90

200

250

2.51

 

3.14

225

255

2.83

 

3.20

23.00

 

28.00

2.90

 

3.50

HF25/22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y26H-2

360

 

380

3.60

 

3.80

263

288

3.30

 

3.62

318

350

3.99

 

4.40

24.00

 

28.00

3.00

 

3.50

HF24/35, C9, PMF-2BB, C7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y27H

350

 

380

3.50

 

3.80

225

240

2.83

 

3.01

235

260

2.95

 

3.27

25.00

 

29.00

3.10

 

3.60

HF22/30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y28

370

 

400

3.70

 

4.00

175

210

2.20

 

3.64

180

220

2.26

 

2.76

26.00

 

30.00

3.30

 

3.80

HF26/18, C5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y28H-1

380

 

400

3.80

 

4.00

240

260

3.01

 

3.27

250

280

3.14

 

3.52

27.00

 

30.00

3.40

 

3.80

FB4B, C10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y28H-2

360

 

380

3.60

 

3.80

271

295

3.40

 

3.70

382

405

4.80

 

5.08

26.00

 

30.00

3.30

 

3.80

FB6E, PMF-2BF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y30H-1

380

 

400

3.80

 

4.00

230

275

2.89

 

3.46

235

290

2.95

 

3.64

27.00

 

32.50

3.40

 

4.10

HF26/26, C8, PMF-2BD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y30H-2

395

 

415

3.95

 

4.15

275

300

3.45

 

3.77

310

335

3.89

 

4.20

27.00

 

32.00

3.40

 

4.00

HF26/30, PMF-2BE, FB5H, C12, PMF-5BE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y32

400

 

420

4.00

 

4.20

160

190

2.01

 

2.39

165

195

2.07

 

2.45

30.00

 

33.50

3.80

 

4.20

HF32/17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y32H-1

400

 

420

4.00

 

4.20

190

230

2.39

 

2.89

230

250

2.89

 

3.14

31.50

 

35.00

3.90

 

4.40

HF32/22, FB4D, C8B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y32H-2

400

 

440

4.00

 

4.40

224

240

2.81

 

3.01

230

250

2.89

 

3.14

31.00

 

34.00

3.90

 

4.30

HF32/25, FB5N, PMF-7BB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y33

410

 

430

4.10

 

4.30

220

250

2.76

 

3.14

225

255

2.83

 

3.20

31.50

 

35.00

3.90

 

4.40

C8B, PMF-2BB, FB4X, C11, PMF-6BB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y33H

410

 

430

4.10

 

4.30

250

270

3.14

 

3.39

250

275

3.14

 

3.45

31.50

 

35.00

3.90

 

4.40

PMF-6BD, FB5B, PMF-5BD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y34

420

 

440

4.20

 

4.40

200

230

2.51

 

2.89

205

235

2.57

 

2.95

32.50

 

36.00

4.10

 

4.40

C11, PMF-5BB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y35

430

 

450

4.30

 

4.50

215

239

2.70

 

3.00

217

241

2.73

 

3.03

33.10

 

38.20

4.10

 

4.80

PMF-7BB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y36

430

 

450

4.30

 

4.50

247

271

3.10

 

3.40

250

274

3.14

 

3.44

35.10

 

38.30

4.40

 

4.80

FB6N, PMF-7BD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y38

440

 

460

4.40

 

4.60

285

305

3.58

 

3.83

294

310

3.69

 

3.89

36.60

 

40.60

4.60

 

5.10

FB9N, PMF-9BD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y40

440

 

460

4.40

 

4.60

330

354

4.15

 

4.45

340

360

4.27

 

4.52

37.60

 

41.80

4.70

 

5.20

FB9B, PMF-9BE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sintered Ferrite Manufacturing Process


The typical physical properties of Ferrite are given in the table below. These values must not be understood as guaranteed, as the properties are not controlled in manufacture. Ferrite magnets are fragile and must never be used as load carrying elements in a design.


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