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Hard ferrite Magnetic material
HARD FERRITE MAGNETIC MATERIAL
MAGNETIC PROPERTIES
Name Remanence Remanence Normal Normal Intrinsic Intrinsic Max. energy Max. energy
Br (kG) Br (mT) coercivity coercivity coercivity coercivity product product
-HcB (kOe) -HcB (kA/m) -HcJ (kOe) -HcJ (kA/m) (B-H)max (B-H)max
(MGOe) (Kj/m3)
min typ min typ min typ min typ min typ min typ min typ min typ
BM 1 I 2.10 2.20 210 220 1.6 1.7 130 135 2.6 2.8 210 220 0.9 0.96 7.2 7.6
BM 3 3.50 3.70 350 370 1.9 2.2 155 175 2.0 2.3 160 180 3.0 3.20 24.0 25.5
BM 5 3.90 4.0 390 400 1.8 2.0 145 160 1.9 2.1 150 165 3.5 3.70 28.0 29.5
BM 7 3.50 3.70 350 370 2.6 3.1 210 245 2.8 3.2 220 255 3.1 3.20 24.5 25.5
BM 8 3.80 3.90 380 390 3.0 3.2 240 255 3.1 3.3 245 260 3.3 3.49 26.0 27.8
BM 9 3.85 3.95 385 395 3.4 3.5 270 280 3.5 3.6 280 290 3.5 3.60 28.0 29.0
HARD FERRITE MAGNETIC MATERIAL
Name
Temperature
Temperature
Density
Relative
Curie
Lin. exp.
Continuous
Recommended
Recommended
coeff. of Br.
coeff. of HcJ.
recoil
temperature
coeff.
maximum
magnetising
magnetising
permeability
operating
field
field
%/°C
%/°C
g/cm3
U rev
°C
10/°C
temp. °C
kOe
kA/m
BM 1
- 0.2
+ 0.4
4.9
1.05 - 1.3
450
9-15
250
BM 3
- 0.2
+ 0.4
4.8
1.05 - 1.3
450
9-15
250
> 20
> 800
BM 5
- 0.2
+ 0.4
4.9
1.05 - 1.3
450
9-15
250
> 20
> 800
BM 7
- 0.2
+ 0.4
4.7
1.05 - 1.3
450
9-15
250
> 20
> 800
BM8
- 0.2
+ 0.4
4.8
1.05 - 1.3
450
9-15
250
> 20
> 800
BM,
- 0.2
+ 0.4
4.8
1.05 - 1.3
450
9-15
250
> 20
> 800
BM 5
J [kGs] J[T]
5 r- 0,5
■
-40°C
■
+20°C
■
+200°C
4
- 0,4
- 0,3
- 0,2
- 0,1
- 0 H[kA/m]
3
2
1
1 kOe = 79.6 kA/m 0.1 T=1kGs
* H [kOe] "!
0
T
o in
o o
o o m
o
o o
TOLERANCES OF HARD FERRITE MAGNETS
Bakker Magnetics can guarantee tolerances applicable to unfinished magnets (DIN 17410). Customers can obtain the desired tolerances on request. If the customer so wishes, we can deviate from our standard tolerances.
Other demagnetization curves and data from material not shown are available on request.
Bakker Magnetics b.v. Sciencepark Eindhoven 5502 5692 EL Son - The Netherlands
E-mail: lnfo@bakkermagnetics.com Phone: +31402678678 Fax: +31402678899 www.bakkermagnetics.com
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