Ferrite

This magnetic alloy is absolutely the most used because of its excellent price performance ratio. It's a ceramic, sintered material. Coercive field and therefore demagnetized field resistance, that decreases when temperature drops. To avoid irreversible losses, make sure that the operating point is still above the knee joint at the minimum operating temperature. Standard equipment available to produce:

  • "wet" segments for motors and servomotors

  • "dry" segments for small motors

  • Blocks, big dimensions too

  • Special rings.

 

 MATERIALS CHARACTERISTICS

TYPE

 GRADE

Residual 

Flux  Density 

Br

Coercitive  Force

( Oe / KAm )

Max  Energy 

Product 

( B H ) max
bHC jHC
MGOe KJm3
KG T KOe KA/m KOe KA/m

Isotropic 

 1A

2.000 - 2.350

 0.200 - 0.235

1630 - 2000

 135 - 160

2800 - 3100

 210 - 250

0.9 - 1.1 

 7.1 - 9  
Anisotropic 2A

3.400 - 3.600

 0.340 -0. 360

2700 - 3000

 215 - 240

2590 - 3400

 235 - 270

2.7 - 3 

 21 - 24
3

3.400 - 3.600

 0.340 - 0.360

2800 - 3000

 220 - 240

3000 - 3500

 240 - 280

2.7 - 3

 21 - 24
4A

3.750 - 4.000

 0.375 - 0.400

3000 - 3200

 240 - 260

3150 - 3500

 250 - 280

3.5 - 3.8

 27.7 - 30
4B

3.900 - 4.100

 0.390 - 0.410

2500 - 3000

 200 - 240

2800 - 3200

 224 - 254

3.7 - 4.1

 29 - 31.8
5A

3.500 - 3.700

 0.350 - 0.370

3200 - 3500

 254 - 280

3900 - 4200 

 310 - 335

3 - 3.2

 23.5 - 25.2
5B

3.300 - 3.600

 0.330 - 0.360

3260 - 3500

 260 - 280

4200 - 4500

 330 - 360

3 - 3.2

 23.5 - 25.2
5X

4.100 - 4.300

 0.410 - 0.430

3.150 - 3.450

250.7 - 274.5

3.200 - 3.500

254.7 - 278.5

4 - 4.4

 31.8 - 35
5N 4.300 - 4.500 0.430 - 0.450 2.700 - 3.000 214.9 - 238.7 2.730 - 3.030 217.3 - 241.1 4.4 - 4.8 35.1 - 38.3
5H 3.950 - 4.150 0.395 - 0.415 3.600 - 3.900 286.5 - 310.3 3.900 - 4.200 310.4 - 343.2 3.7 - 4.1 29.5 - 32.7
5E 3.600 - 3.800 0.360 - 0.380 3.400 - 3.700 271 - 295 4.800 - 1.500 382 - 406 3.1 - 3.5 24.7 - 27.9

 

Other typical magnetics properties (DIN 17410)

Curie

Temperature

°C Max

Operating

Temperature

°C Max

Temperature

Coefficent

of Br

% x °C

Temperature

Coefficent

of jHC

Relative Recoil

Permeability

µ rec

Minimum

saturation

field

KO/KAm

 

 
450 250 -0.2 +0.3 1.10 8/640    

Other typical physical properties (DIN 17410)

Density

g/cm3

Vickers

Hardness

Hv

Flexural

strength

N/mm2

Tensil

strength

N/mm2

Compression

strength

N/mm2

Elastic

module

N/mm2

Thermal

expansion

coefficent

10-6/k

Specific electric

resistivity

10-8/OHM/m

4.85-4.95

530

130

50

700

150

//10ca

>104

TEMPERATURE COEFFICIENT: Br 0.18/0.20 % per °C ---jHC + 12.5 Oe per °C

For further technical information about mechanical tolerances, magnetization, temperature behaviour, hardness, compression resistance, glues, etc, etc...
CONSULT OUR TECHNICAL DEPARTMENT

 

SAIMAG  S.r.l.  Via Europa 35/b - 20010  Pogliano Milanese (MI)- Italy - Tel. +39 02 -93548070 - Fax +39 02 - 93540240

E-mail: info@saimag.com  URL: www.saimag.com