Fe-based Nanocrystalline Alloy Strip

Grade: 1K107 series (1K107,1K107A, 1K107B) Alloy Compositions: Fe, Cu, Nb, Si, B, Ni, Co

Features:

Nanocrystalline alloy is composed of ferrum, silicon, boron and a small amount of copper, molybdenum, niobium, nickel and cobalt; amongst which copper and niobium are essential elements to obtain the nanocrystalline structure. After annealing treatment with appropriate temperature, the nanocrystalline alloy strip forms crystalline grains with the size of 10-20nm and a dispersed structure. The structure has very excellent magnetic properties, including high Saturation magnetic induction; high magnetic permeability; low coercive force; low loss; good temperature stability, wear resistance, corrosion resistance; as well as lower price with the best performance/price of all metal soft magnetic materials. Nanocrystalline alloy material is cheap, but the magnetic properties can be excellent, almost comparable to the cobalt-based amorphous alloy. It is ideal material for industrial and civil high-frequency transformers, mutual inductors, inductors, and for replacement of permalloy and ferrite products. With the above mentioned magnetic performance characteristics, the Fe-based nanocrystalline alloy has the following advantages in magnetic applications:
1. High Saturation magnetic induction Bs - being capable of reducing the size of transformers
2. High magnetic permeability and low coercive force - being capable of improving the efficiency of transformers and the sensitivity of mutual inductors, reducing the coil distribution parameters, reducing the number of turns of common mode inductors, reducing copper loss
3. Low loss - being capable of reducing the temperature rise of transformers
4. Good stability - being capable of long-term work under working condition of high temperature (130 ℃)
5. Lower price - the best performance/cost of all metal soft magnetic materials.

Characteristics and applications of strips with different marks:

 

Strip Grade	Material composition	Strip preparation technology	Thickness of strip (um)	Lamination factor	Best application
1K107	Fe, Si, B, Nb, Cu	Ordinary DI strip	32±3	0.75	Iron core of power transformer, precise current transformer and high-power switching mode power supply transformer
1K107A	Fe, Si, B, Nb, Cu, Ni, Go	Vacuum pressure spray and shear strip	22±2	0.8	Iron core of precise current transformer, inverter transformer, magnetic amplifier, spike suppressor and saturationreactor
1K107B	Fe, Si, B, Nb, Cu	Vacuum pressure spray stripand ultra-thin shear strip	22±2	0.8	Iron core of common mode and differential mode inductor and iron core of Hall sensor

Typical performance parameters comparison among strips of different marks and comparison with ferrite material:

Basic magnetic performance parameters	1K107	1K107A	1K107B	Ferrite
Saturation magnetic induction Bs (T)	≥1.25	≥1.2	≥1.2	0.5
Coercive force Hc (A/m)	≤0.75	≤0.5	≤1	3
Remanence ratio Br/Bs	0.6-0.8	0.6-0.8	0.6-0.8	0.4
Initial magnetic permeability μi (K)	≥80	≥120	≤100	≤15
Maximum magnetic permeability μm (K)	≥600	≥1000	≥1000	20
Resistivity μΩ·cm	130	130	130	15*106
Core loss (W/kg) p 1/1k	≤1.1	≤1.0	≤1.0	-
Core loss (W/kg) p 0.4/10k	≤5	≤4	≤4	-
Core loss (W/kg) p 0.5/20k	≤30	≤25	≤25	-
Core loss (W/kg) p 0.2/100k	≤80	≤60	≤60	200
Lamination factor	0.75	0.8	0.8
Magnetostriction coefficient	2×10-6	2×10-6	2×10-6	-
Density ρ (g/cm3)	7.2	7.2	7.2	4.8
Crystallization temperature Tx (℃)	515	515	515	-
Curie temperature Tc (℃)	560	560	560	≤200
Vickers hardness (HV) kg/mm²	880	880	880	-
Thickness (μm)	30	22	22	-

Test performance curves of typical samples:

1. Static hysteresis loop
2. Loss curves
3. Frequency characteristic curve

Common specifications of Fe-based nanocrystalline alloy strip:

Model (or 107A, B)	Width of strip (mm)
TC-107-3.2	3.2±0.1
TC-107-4.5	4.5±0.1
TC-107-5.0	5.0±0.1
TC-107-6.5	6.5±0.1
TC-107-8.0	8.0±0.1
TC-107-10	10.0±0.1
TC-107-12	12.0±0.1
TC-107-15	15.0±0.1
TC-107-20	20.0±0.1
TC-107-25	25.0±0.1
TC-107-30	30.0±0.1
TC-107-35	35.0±0.1
TC-107-40	40.0±0.1

Other strips of various specifications can be ordered according to the customers’ demands. (2~50mm)