Ohmalloy Material Co.,Ltd
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Application area:
Switch power transformer and Pulse transformer iron core
Power transformer , precision current mutual inductor iron core
Leakage protection switch mutual inductor iron core
Filtering inductance, storage inductance, the electric reactor iron core
EMC common mode inductance and differential mode inductance iron core
Saturable reactor, magnetic amplifier, Spike killer, Pulse Compressor iron core and magnetic bead
Features:
High Saturation magnetic induction - reduce transformer volume
High magnetic permeability low coercive force- improve transformer efficiency, mutual inductor sensitivity, reduce coil distribution parameters
Low loss- reduce transformer temperature rise
Good temperature stability - under 130℃ for long-term work
Lower price - has the best cost performance of all the metal soft magnetic material
Typical Properties
Physical properties of Nanocrystalline alloy
| Saturation magnetic induction (Bs) | 1.25T | Hardness (Hv) | 880 |
| Curie temperature (TC) | 560℃ | Density (d) | 7.2g/cm3 |
| Crystallizing temperature( Tx) | 510℃ | Resistivity(r) | 90mW-cm |
| Saturation magnetostriction coefficient (ls) | <2×10-6 | Continuous operating temperature range | -55-130℃ |
Magnetic properties of Nanocrystalline alloy
| Product Type | Transverse magnetic annealing | No magnetic annealing | Longitudinal magnetic annealing |
| Initial permeability | >2×104 | >8×104 | >1×104 |
| Maximum permeability | >5×104 | >45×104 | >50×104 |
| Residual magnetic induction | <0.2 T | 0.6 T | >0.85 T |
| Coercive force | <1.8A/m | <0.8A/m | <1.8A/m |
| Iron loss P(20kHz, 0.5T) | <30W/kg | <50 W/kg | <90W/kg |
| Iron loss P(100kHz, 0.3T) | <150W/kg | <150 W/kg | <300W/kg |
| Iron loss rate(-55°C –125C ) | <15% | <15% | <15% |
The comparison between Nanocrystalline alloy and Permalloy iron alloy
| Basic parameter | Superfine crystal iron core | Permalloy iron alloy (1J85) | Ferrite |
| Saturation magnetic induction Bs(T) | 1.25 | 0.75 | 0.5 |
| Residual magnetic induction Br(T) | 0.2~0.9 | - | 0.20 |
| Saturation magnetostriction coefficient (×10-6) | <2 | <2 | 4 |
| Resistivity (mmW-cm ) | 80 | 56 | 106 |
| Curie temperature ∕℃ | 570 | 400 | <200 |
| Initial permeability μ0(Gs/Oe) | >8×104 | >8×104 | - |
| Maximum permeability μm(Gs/Oe) | >50×104 | 60×104 | 4×104 |
| Coercive force Hc (A/m) | <2 | <1 | 6 |
| Iron loss (20KHz,0.5T) (W/Kg) | <35 | - | No |
| Iron loss (50KHz,0.3T) (W/Kg) | <50 | - | No |
