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Hard Ferrite

Country/Region china
Company Xiamen Jingxin Magnet Company Ltd.
Categories Ferrite Magnets
Telephone 0086-592-5802700
ICP License Issued by the Chinese Ministry
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Hard Ferrite

The elements of Ferrite magnets are ferric oxide, barium oxide and strontium oxide, etc. Ferrite magnets have higher coercive force, higher resistance to be demagnetized and higher corrosion resistance than other non-rare earth permanent magnets. The operating temperature range is from -40°C to +250 °C. The biggest advantages of such magnets are their low price.
Ferrite magnets are widely used in motors, speakers, microwave devices, electronics, machines, instruments, meters, toys and crafts, etc.

Physical property of sintered hard ferrite

Parameters

Mark

Unit

Value

Note

Relative Recoil Permeability

rec

rec

1.05~1.3

Curie temperature

Tc

°C

460

The coefficient of Br to temperature

Br

°C-1

-0.20%

0~100°C

The coefficient of Hcj to temperature

HCJ

°C-1

0.2%~0.5%

0~100°C

Density

D

g/cm3

4.8~5.0

The coefficient of linear expansion

R

°C-1

7~1510-6

Hardness

HV

HV

480~580

Permanent ferrite magnet industry standard of USA

Grade

Br
(mT)

Hcb
(KA/m)

Hcj
(KA/m)

(BH)max
(KJ/m3)

D
(g/cm3)

C1

230

148

258

8.36

4.8

C5

380

191

199

27

4.8

C7

370±10

270±8

318±8

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