Nanocrystalline Alloy
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Introduction
Fe based nanocrystalline alloy material has high initial permeability, low loss, low coercive force and high saturation magnetic induction. We can produce magnetic cores with different remanent magnetization following different annealing methods. Nanocrystalline alloy also has good temperature stability with an working temperature of -55℃~130℃.
Application
This nanocrystalline alloy is mainly used in magnetic cores of high power switch power supply, current mutual inductor, voltage mutual inductor, precision current mutual inductor, zero sequence current transformer, EMC common mode choke, inverter main transformer and magnetic amplifier.
Performance comparison between Fe based crystalline alloy and Permalloy
| Basic performance | Fe based crystalline alloy | Permalloy |
| Saturation magnetic induction/Bs (T) | 1.25 | 0.75 |
| Initial permeability (μi) | >8×104 | ＜6×104 |
| Saturated permeability (μm) | 60×104 | 60×104 |
| Loss /Ps (w/kg) | 20KHz 0.5T Ps≤30 | 20KHz 0.5T Ps≤25 |
| Coercive force/Hc (A/m) | ≤1.6 | ≤2.0 |
| Lamination coefficient | 0.76 | 0.90 |
| Magnetostriction coefficient | ＜2×106 | ＜1×106 |
| Thickness (m m) | 0.03 | 0.15 |
Performance comparison of different annealing methods
Performance comparison between general annealing and transverse annealing and longitudinal annealing
| Performance | General annealing | Longitudinal magnetic annealing | Transverse magnetic annealing |
| Saturation magnetic induction/Bs (T) | 1.20 | 1.20 | 1.20 |
| Initial permeability /μi(H=1mOe) | ≥8×104 | ≥2.5×104 | ≥2.5×104 |
| Loss/Ps (w/kg) | ≤35 | ≤30 | ≤30 |
| Coercive force/Hc (A/m) | ＜1.6 | ＜1.5 | ＜1.5 |
| Residual magnetism /Br (T) | ＜0.65 | ＞0.85 | ≤0.20 |
| Grade of main component | Fe (Co, Ni) | Cu | Nb | Si+B |
| 1k107 | 70-76 | 0.5-2 | 1-5 | 20-25 |
Performance comparison of different annealing methods
1K107---represents ordinary nanocrystalline strip material, A represents Co added strip material, B represents Ni added strip material and D represents high initial permeability strip material.
| Basic parameter | Initial permeability | Saturated permeability | Saturation magnetic induction | Coercive force | Loss Ps (w/kg) | |
| Product number | μi (H=1mOe) | μm | Bs (T) | Hc(A/m) | P0.5T/20K | P0.2T/100K |
| 1K107 | ≥8×104 | ≥60×104 | 1.15 | ≤1.6 | ≤30 | 60 |
| 1K107A | ≥4×104 | ≥12×104 | 1.20 | ≤1.5 | ≤30 | 130 |
| 1K107B | ≥4×104 | ≥12×104 | 1.20 | ≤1.5 | ≤30 | 110 |
| 1K107D | ≥12×104 | ≥80×104 | 1.15 | ≤1.6 | ≤30 | 70 |
Index
iron based alloy, alloy strip
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