Alnico Magnet

Fairly strong magnetic power (Power-Index(1) = 6~7)
Relatively high cost (Cost-Index(2) = 7~8)
Anisotropic(3)
Produced by casting or sintering powder metallurgical technique with alloy composite of Al-Ni-Fe-Co
Very hard & brittle
Poor resistance to demagnetization
Excellent stability over a wide range of temperature

 
Physical Properties
Parameter
Curie Temp.
°C
860
Max.Operating Temp.
°C
525-550
Resistivity
µ .cm
47-54
Hardness
Hv
520-630
Density
g/cm3
6.9-7.3
Rev. Recoil Permeability
µ rec
1.70-4.70
Saturation Field Strength
kOe
2.7-6.3
kA/m
215-500
Temp.Coefficient of Br
%/°C
-0.025~-0.02
Temp.Coefficient of iHc
%/°C
+0.01~+0.03
Production Flow Chart
Cast AlNiCo
Sintered AlNiCo
 
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