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Ferrite/Ceramic Magnets

Ferrite/Ceramic Magnets

Category: hard ferrite magnets/ ceramic magnets

Advantages: coercive force is high;strong resistance to demagnetization,suitable for dynamic working magnetic circuit structure;good corrosion resistance,surface treatment not needed 

Disadvantages: low magnetic energy; not resistant to low temperature

Product Description

Hard ferrite magnets belong to sintered permanent magnetic material, which made from oxide iron, barium, and strontium carbonate by ceramic processing technology, just because of the processing method, it also named as ceramic magnets in America.This magnetic material has strong ability to resist demagnetization and the advantage of low cost.

Ferrite permanent magnets classified as isotropic and anisotropic. Isotropic ferrite magnets have weak magnetic strength, but it can be magnetized through different directions. Anisotropic ferrite magnets have stronger magnetic strength than isotropic, but it can be only magnetized through certain direction.

By magnetic strength, ferrite magnets or ceramic magnets are much weaker than neodymium permanent magnets and SmCo magnets, but stronger than AlNiCo magnets. But its advantages of low cost, excellent corrosion and demagnetization resistance, which makes it widely used in the area of magnetic separator, speaker magnets, magnetic toys, office magnets, car magnets. From the aspect of shape, hard ferrite magnets are usually available as ceramic block magnets, ferrite ring magnets, ferrite disc magnets and ceramic block magnets. Ferrite disc magnets often used on office magnets, ferrite ring magnets often used to make loudspeaker, ferrite block magnets can be used to make separate magnets.

Ferrite magnets (ceramic magnets ) was developed in the year of 1960, and it is lower in power (B, Br, BHmax) compared to other formulations, and are very brittle. However, they have very high Hcj and good Tc, and are quite corrosion-resistant. So ceramic magnets are a cost-effective choice.

Ferrite magnets produced by powder metallurgy ways, the remanence is low, The coercive force is high, especially suit for magnetic structure used in the condition of dynamic operation. The material is hard and crisp, silicon carbide tools are used for cutting machine. The main material for ferrite magnets is oxide, not easy to be rust.

Grade

Br

HcB

HcJ

(BH)max

Work Temp

China Standard

IEC standard

mT

kA/m(min.)

kA/m(min.)

kJ/m(min.)

℃(max.)

Y10T

HF 8/22

200-235

125-160

210-280

6,5-9,5

250

Y20

HF 20/19

320-380

135-190

140-195

18,0-22,0

250

Y22H

HF 20/28

310-360

220-250

280-320

20,0-24,0

250

Y23

HF 22/30

320-370

170-190

190-230

20,0-25,0

250

Y25

HF 24/16

360-400

135-170

140-200

22,5-28,0

250

Y26H

HF 24/23

360-390

220-250

225-255

23,0-28,0

250

Y26H-2

HF 24/35

360-380

263-288

318-350

24,0-28,0

250

Y28

HF 26/16

370-400

175-210

180-220

26,0-30,0

250

Y25H

HF 26/18

360-390

175-215

215-230

24,0-27,0

250

Y28H

HF 26/24

380-400

240-260

250-280

27,0-30,0

250

Y28H-2

HF 26/26

360-380

270-295

380-405

26,0-30,0

250

Y30

HF 28/16

380-385

190-210

200-220

26,0-28,0

250

Y30BH

HF 28/28

380-400

230-275

235-290

27,0-32,0

250

Y30H-2

HF 30/26

395-415

275-300

310-335

28,5-32,5

250

Y32

HF 32/17

400-420

160-190

165-195

30,0-33,5

250

Y33

HF 32/22

410-430

220-250

225-255

31,5-35,0

250

Y33H

HF 32/25

410-430

240-270

250-275

31,5-35,0

250

Y35

-

410-430

175-195

180-200

30,0-32,0

250


Property/Performance Parameter of Ceramic Magnets(America Standard)


Material

Br

HcB

HcJ

(BH) Max

mT

KG

KA/m

KOe

KA/m

KOe

Kj/m3

MGOe

C1

230

2.3

148

1.86

258

3.50

8.36

1.05

C5

380

3.8

191

2.40

199

2.50

27.0

3.40

C7

340

3.4

258

3.23

318

4.00

21.9

2.75

C8

385

3.85

235

2.95

242

3.05

27.8

3.50

C8B

420

4.2

232

2.913

236

2.96

32.8

4.12

C9

380

3.8

280

3.516

320

4.01

26.4

3.32

C10

400

4.0

288

3.617

280

3.51

30.4

3.82

C11

430

4.3

200

2.512

204

2.56

34.4

4.32


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