Hard Ferrite Magnet

• Fairly strong magnetic power (Power-Index(1) = 4~5)
• Most common used magnet with low cost (Cost-Index(2) = 1~3)
• Isotropic & Anisotropic available(3)
• Produced by powder metallurgical engineering with chemical composition of Ba/Sr O.6 Fe2O3
• Very brittle & relatively hard
• Good resistance to demagnetization
• Good temperature stability
• Oxided to saturation with excellent corrosion resistance
 
Physical Properties
Parameter
Curie Temperature
°C
450
Maximum Operating Temperature
°C
250
Hardness
Hv
480-580
Density
g/cm3
4.8-4.9
Relative Recoil Permeability
µ rec
1.05-1.20
Saturation Field Strength
kOe
10
kA/m
800
Temp. Coefficient of Br.
%/°C
-0.2
Temperature Coefficient of iHc
%/°C
0.3
Tensile Strength
N/mm2
<100
Transverse Rupture Strength
N/mm2
300
Production Flow Chart
 
Magnetic Properties
Grade
Residual
Coercive Force
Intrinsic Coercive Force
Max Energy Products
Operating
Density
Flux Density Br
Hcb
Hcj
(BH) max
Temperature
D
Gs (mT)
Oe (kA/m)
Oe (kA/m)
MGOe (kJ/m3)
ĘC
g/cm3
Y10T
>=2000 (>=200)
1600~2000 (128~160)
2889~3391 (230-270)
0.8~1.2 (6.4~9.6)
<=250
4.5~4.9
Y20
3200~3800 (320~380)
1600~2400 (128~192)
1884~3014 (150~240)
2.3~2.7 (18.3~21.5)
<=250
4.5~4.9
Y25
3500~3900 (350~390)
1900~2600 (152~208)
2072~3140 (165~250)
2.8~3.2 (22.3~25.5)
<=250
4.5~4.9
Y30
3800~4200 (380~420)
2000~2700 (160~216)
2072~3140 (165~250)
3.3~3.7 (26.3~29.5)
<=250
4.6~5.1
Y35
4000~4400 (400~440)
2200~2800 (176~224)
2512~2889 (200~230)
3.8~4.3 (30.3~33.4)
<=250
4.7~5.1
Y30BH
3800~4000 (380~400)
2800~3000 (224~240)
3077~3391 (245~270)
3.4~3.8 (27.1~30.3)
<=250
4.6~5.1
 
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