Amorphous Materials Properties and Applications 

Applications:  
SMPS output inductors, differential input inductors, Noise preventive chokes in car audio or car navigation system, PFC use in air conditioner, plasma TV set, Amorphous C-cores used in high frequency output inductors and transformers in SMPS,UPS, Medium frequency transformer cores in heating equipment . 

Characteristics:  
Highest saturate induction-Reduce component volume, Low coercivity-Promote component efficiency, Low core loss-Reduce device temperature rise, Variable permeability -Satisfy the various application requirements, Excellent stability-Having highest serving temperature of 130oC.

 

Amorphous alloy(Fe base) properties:
       
Saturate induction  1.56T  Hardness Hv  960kg/mm2
Curie Temperature  410°C  Density  7.18g/cm3
Crystallization Temperature  550°C  Resistivity  130μΩ-cm
Saturate magnetostriction    27×10-6      
 
Max. permeability >20×104
Remanace 1.0T
Coercivity <2.4 A/m
Core loss(50Hz, 1.4T) <0.13W/kg
Core loss(400Hz, 1.2T) <1.25W/kg
Core loss(8KHz, 1.0T) <60W/kg
Loss variation(-55- +125oC <15%
 

Nanocrystalline material properties:

 

 
Saturate induction  1.25 T  Hardness Hv  880kg/mm2 
Curie Temperature  560 °C Density  7.2 g/cm3 
Crystallization Temperature  510 °C  Resistivity  130mW-cm 
Saturate magnetostriction   2×10-6      
 
Max. permeability >20×104
Remanace 1.0T
Coercivity <2.4 A/m
Core loss(50Hz, 1.4T) <0.13W/kg
Core loss(400Hz, 1.2T) <1.25W/kg
Core loss(8KHz, 1.0T) <60W/kg
Loss variation(-55- +125oC <15%

 
Magnetic Alloy Comparison
http://www.solarinverters.net/comparison/symbol.gif
                                        Materials d Bs B800 Br/B800 Hc µr(×103) Pcw s Tc
(µm) (T) (T) (%) (A/m) 1 kHz 100 (W/kg) (ppm) (C)
          kHz      
Fe-based amorphous 23 1.56 1.56 83 3.2 5 2 630 27 395
Co based amorphous 18 0.55 0.55 50 0.2 115 18 36 ˜0 180
Nanocrystalline alloy 18 1.23 1.23 50 2.5 70 15 41 ˜0 570
80% Ni-Permalloy 25 0.74 0.74 55 0.5 50 5 340 ˜0 460
3% Si-Steel 230 2.03 1.92 85 6 4.6* 0.8* 6,100 -0.8 750
6.5% Si-Steel 100 1.8 1.38 88 20 4.5* 0.4* 1,300 0.1 700
High Perm. Ferrite - 0.44 0.44 23 8 5.3 5.3 250 -0.6 150
Low Core Loss Ferrite - 0.49 0.49 29 12 2.4 2.4 140 -0.6 200