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M a g n e t i c   P r o p e r t i e s

Ferrite magnets are very hard but brittle ceramic products.They are characterized by a very high normal and intrinsic coercive force and are virtually free from the effects of a self-demagnetization. They possess a very high electrical resistivity which makes them ideally suited for high frequency applications, the eddy currents effects being almost negligible.

The tables below depicts the physical, mechanical and magnetic properties achieved by us.

Physical and Mechanical Properties (Nominal Values)

Materials
Density
g/cm3
Hardness
on MHO's scale
Curie Point
oC
Coefficient of
Thermal Expansion
peroC x 106
Electrical Resistivity
at 25 oC
Specific Heat
Cal/gm oC
Sintrox III
(Wet Pressing)		 4.9 - 5.1 6.5 450 9 - 15 > 106 0.15 - 0.20
Sintrox III
(Dry Pressing)		 4.9 - 5.1 6.5 450 9 - 15 > 106 0.15 - 0.20
Sintrox IV
(Wet Pressing)		 4.8 - 5.0 6.5 450 10 - 15 > 106 0.15 - 0.20


Magnetic Properties (Nominal Values)

Materials
Remanence Br.
Gauss
Coercivity Hc,
Oersted
Maximum Energy
Product (BH)
max MGOe
Intrinsic Coercivity
Hci, Oersted
Average Recoil
Permeability
Minimum Magnetising
Force Hs Oersted
Reversible Temp
Co-efficient of Br,
%/ o C
Anisotropic
1) Sintrox III
Wet Pressed		 3900-4200 1800-2200 3.5-4.1 1900-2400 1.1 10000 - 0.18
2) Sintrox III
Dry Pressed		 3700-3850 1800-2200 3.0-3.3 1900-2400 1.15 10000 - 0.18
3) Sintrox IV
Wet Pressed		 3900-4200 2800-3000 3.8-4.2 2800-3200 1.05-1.10 12000 - 0.18

Conversion :
1 Tesla = 104 Gauss
1 KA/m = 4 Oersteds = 12.57 Oersteds
1 KJ/m = 4 10-2 MGOe
1 Gauss = 1/10000 Tesla
1 Oersted = 0.0796 KA/m
1 MGOe = 7.96 KJ/m3

* Magnetic Properties are material properties measured on standard magnet

Induction v/s Demagnetising Field Graph.

Graph
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