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Application Fields:
• Transformer cores for high frequency switch mode power supplies
• Current transformer cores for electric industry
• Transformer cores for ground-fault-interrupters
• Cores for filters, storage inductors, and reactors
• EMC common mode chokes
• Sensor cores
• Cores for saturable reactors, magnetic amplifiers, beads, and pulse compressors
Characteristics:
• High saturate induction—minimize transformer volume
• High permeability and low coercivity—promote efficiency of transformers and reduce distributional capacitance
• Low core loss—minimize temperature rise of transformers
• Excellent stability—with the highest serving temperature of 130℃for long time
• Relatively low cost compared to permalloys
Properties:
Physical properties:
Saturate induction |
1.25 T |
Saturate magnetostriction |
2´10-6 |
Curie temperature |
560 °C |
Density |
7.2 g/cm3 |
Crystallization temperature |
510 °C |
Resistivity |
130μΩ-cm |
Hardness Hv |
880kg/mm2 |
Magnetic properties:
Product type |
Transverse field annealed |
No field annealed |
Longitudinal field annealed |
Initial permeability |
>3×104 |
>8×104 |
>1×104 |
Maximum permeability |
>5×104 |
>45×104 |
>50×104 |
Remanace |
<0.2 T |
0.6 T |
>0.85 T |
Coercivity |
<1.8A/m |
<0.8A/m |
<1.8A/m |
Core loss (20kHz, 0.5T) |
<50W/kg |
<25 W/kg |
<90W/kg |
Core loss (100kHz, 0.3T) |
<150W/kg |
<150 W/kg |
<300W/kg |
Variation of core loss (-55 °C—125 °C) |
<15% |
<15% |
<15% |
Comparison of nanocrystalline alloy with other materials:
Material |
Nanocrystalline |
Permalloy |
Ferrite |
Saturate induction (T) |
1.25 |
0.75 |
0.5 |
Magnetostriction (×10-6) |
<2 |
<2 |
4 |
Resistivity (μΩ-cm) |
80 |
56 |
106 |
Curie temperature (°C) |
570 |
400 |
<200 |
Remanace (T) |
0.20-1.0 |
－ |
0.20 |
Initial permeability (Gs/Oe) |
>80,000 |
>80,000 |
－ |
Maximum permeability (Gs/Oe) |
>200,000 |
600,000 |
<20,000 |
Coercivity Hc (A/m) |
<2 |
<1 |
6 |
Core loss (20KHz,0.5T) (W/Kg) |
<35 |
－ |
- |
Core loss (50KHz,0.3T) (W/Kg) |
<60 |
－ |
- |
Specifications:
Part No. |
Width, mm |
Thicknes, μΩ |
Processing status |
RN1-0080 |
8±0.2 |
30±5 |
Cast ribbon |
RN1-0100 |
10±0.5 |
30±5 |
Cast ribbon |
RN1-0150 |
15±0.5 |
30±5 |
Cast ribbon |
RN1-0180 |
18±0.5 |
30±5 |
Cast ribbon |
RN1-0200 |
20±0.5 |
30±5 |
Cast ribbon |
RN1-0250 |
25±1 |
30±5 |
Cast ribbon |
RN1-0300 |
30±1 |
30±5 |
Cast ribbon |
RN1-0350 |
35±1 |
30±5 |
Cast ribbon |
RN1-0400 |
40±1 |
30±5 |
Cast ribbon |
RN1-0080 |
8±0.2 |
26±2 |
Slit ribbon |
RN1-0100 |
10±0.5 |
26±2 |
Slit ribbon |
RN1-0150 |
15±0.5 |
26±2 |
Slit ribbon |
RN1-0200 |
20±0.5 |
26±2 |
Slit ribbon |
Ribbons with other specifications can be provided according to customer's demand.
Typical characteristic curves:
Fig.1 Hysteresis loops
Fig.2 Core loss after no-field-annealing
Fig.3 Core loss after transverse-field-annealing (left) and longitudinal-field-annealing (right)
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