Table of Properties for
Ferrite Magnets

Magnetic Properties
Physical and Thermal Properties

 

 

 

 

 

 


Magnetic Properties
Grade
Br (Gauss)
Hc (Oersteds)
Hci (Oersteds)
BHmax (MGOe)
Maximum Operating Temperature (°C)
Temperture Coefficient of Br (%/°C)
Density (Lb/in3)
1
2,200
1,900
3,250
1.1
300
-0.18
0.18
5
3,950
2,400
2,450
3.6
300
-0.20
0.18
8
3,900
3,200
3,250
3.5
300
-0.20
0.18
10
4,200
2,950
3,050
4.2
300
-0.20
0.18

 

 

 

 


Physical and Thermal Properties
Property Typical Value
Coefficient of thermal expansion (25°C to 450°C)
Perpendicular to orientation
10 x 10-6 cm/cm/°C
Parallel to orientation
14 x 10-6 cm/cm/°C
Thermal conductivity
0.007 cal/cm-sec°C
Reversible temperature coefficient of residual induction
-0.2% /°C
Reversible temperature coefficient of intrinsic coercive force
0.2 to 0.5% /°C
Curie temperature
450°C
Maximum service temperature* (without metallurgical change)
800°C

 

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