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
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

Main components

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