FERRITE

Item Unit Isotropic Anisotropic by Dry Anisotropic by Wet
Compositon BaO•6Fe2O3 SrO•6Fe2O3 SrO•6Fe2O3
Molding Process Dry Powder Dry Powder
in Magnetic Field
Wet Powder
in Magnetic Field
Residual Flux Density
Br
mT ≥200 310 to 360 380 to 400
kG ≥2.0 3.1 to 3.6 3.8 to 4.0
Coercive Force
bHc
kA/m 127 to 159 220 to 250 222 to 238
KOe 1.6 to 2.0 2.8 to 3.2 2.8 to 3.0
Intrinsic Coercive Force
iHc
kA/m 135 to 167 280 to 320 230 to 246
KOe 1.7 to 2.1 3.5 to 4.0 2.9 to 3.1
Maximum Energy Product
(BH) max
kJ/m2 6.3 to 9.5 20 to 24 27 to 30
MGOe 0.8 to 1.2 2.5 to 3.0 3.4 to 3.8
Temperature Coefficent Br %/K -0.18 -0.18 -0.18
Temperature Coefficent iHc %/K 0.22 0.27 to 0.42 0.27 to 0.42
Curie Point
Tc
K 723 733 733
°C 450 460 460
Recoil Relative Magnetic
Permeability
μrec
1.1 to 1.2 1.1 to 1.2 1.05 to 1.1
Density g/cm2 4.8 4.9 4.9
Deflecting Strength Mpa 29 to 68 49 to 88 49 to 88
Kgf/mm2 3 to 7 5 to 9 5 to 9
Compression Strength MPa >686 >686 >686
Kgf/mm2 >70 >70 >70
Tensile Strength MPa 19 to 49 19 to 49 19 to 49
Kgf/mm2 2 to 5 2 to 5 2 to 5
Specific Heat J/ (Kg•K) 0.84x103 0.84x103 0.84x103
cal/g•°C 0.2 0.2 0.2
Vickers Hardness HV 530 530 530
Thermal Expansion Coefficient
Lateral
ppm/K 9.9 11 13
Thermal Expansion Coefficient
Vertical
ppm/K 9.9 9 8
JIS MPB-8/15D MPS-24/24D MPS-31/24W
MMPA CERAMIC-1 CERAMIC-6 CERAMIC-8
Magnetic Field To Be Charged
For Magnetization
kA/m 800 800 800
KOe 10 10 10
Electric Resistance nΩ•m >102 >102 >102