Amorphous Ribbon 2019-05-28T12:47:03+00:00

Amorphous Ribbon

SUMAMO amorphous ribbon

Amorphous alloys are solid alloys which are formed when the atoms do not crystallize in an orderly arrangement during super-rapid solidification. It belongs to long-range disordered and short-range ordered structure. Because there is no regular spatial lattice in amorphous alloys, there is no grain and grain boundary in amorphous alloys. Amorphous alloys are mainly composed of ferromagnetic elements (iron, cobalt, nickel) and non-metallic elements (Si, C, B, P, V, etc.). Due to the special microstructure and composition of amorphous alloy, it has many unique properties, such as excellent magnetic properties, mechanical properties (corrosion resistance, wear resistance, high strength, hardness and toughness), high resistivity and electromechanical coupling properties.

Preparation of Amorphous Alloys

The preparation technology of amorphous alloy is totally different from the traditional method. It adopts the super-rapid solidification technology with cooling rate of about 106 C/s. From molten steel to strip forming at one time, it reduces many intermediate processes compared with the general rolling process of metal strip, and there is no “three pollution” emission in the whole production process. It is known as energy saving,New green materials with environmental protection and high efficiency.

Drawing Of Ribbon Making Process (Rapid Solidification Process)

Microstructure of Amorphous Alloys

The Hysteresis Loops Of Amorphous Alloys Are Compared With Those Of Other Commonly Used Soft Magnetic Alloys.


  • High saturation induction of 1.56 Tesla—Reducing component volume.

  • Low coercivity—Increasing component efficiency.

  • Low core loss—Reducing temperature rise in devices.

  • Variable permeability by different heat treatments—Satisfying various application requirements.

  • Excellent thermal stability—Having a highest service temperature of 130oC.

Physical Properties 

Saturation Magnetization(Bs)1.56TSaturation Magnetostrictive Coefficient(λs)<27×10-6
Curie Temperature(Tc)410℃Density(d)7.18g/cm3
Crystallization Temperature(Tx)535℃Resistivity(ρ)130μΩ-cm
Hardness(Hv)960Continuous Operating Temperature Range-55~130℃

Magnetic Properties

Transverse Field AnnealedNo Field AnnealedLongitudinal Field Annealed
Maximum Permeability μm>2×104>20×10425×104
Saturation Induction BS1.5 T1.5 T1.5 T
Remanence Br<0.5 T1.0 T1.2 T
Coercivity HC<4A/m<2.4 A/m<4A/m
Core loss (50 Hz, 1.4 T)<0.2 W/kg<0.13 W/kg<0.3 W/kg
Core loss (400 Hz, 1.2 T)<1.8 W/kg<1.25 W/kg<2 W/kg
Core loss (8 kHz, 1.0 T)<80 W/kg<60 W/kg<100 W/kg
Variation In Loss Between -55oC and 125 o<15%<15%<15%
Variation In Loss At 120 oC for 200 Hours<15%<15%<15%
"Amorphous Inductor"


  • Medium-frequency transformer cores in heating equipment

  • Toroidal gapless cores as SMPS output inductors and differential input inductors

  • Toroidal gapless cores as noise prevention chokes in car’s audio and navigation system.

  • Toroidal gap cores for PFC used in air conditioner and plasma TV

  • High-frequency rectangular cut cores as output inductors and transformers in SMPS, UPS etc.

  • Toroidal gapless cores as pulse transformer for driving IGBTs, MOSFETs and GTOs

  • Amorphous stators and rotors in high power density speed-variable electric motors and generators

Performance Curves



NumberPart No.Width(mm)Thickness Deviation(μm)Thickness(μm)
              A         B
Strip type
1SUMAMO22      ±120-25>25Direct Sprayed ribbon/

Slitting ribbon


Other columns dimensions available according to requirements (2~170mm).

Ask us for price and solution today!

Your inquiry will be replied within 24 hours,and we respect your privacy.