Nanocrystalline alloy strip

Iron-based nanocrystalline alloy is a new type of soft magnetic alloy material, which is composed of metal elements Fe, Cu, Nb and metalloid elements Si and B. It also contains trace metal elements such as Mo, Ni and Co in special applications. Adopting the international advanced quenching and rapid quenching technology, the molten metal is directly cooled at a rate of 106 ° C / s, and an iron-based amorphous alloy thin strip with a thickness of 25 to 35m is made. The alloy ribbon is partially crystallized by annealing, and nanocrystalline particles (diameter 10-20nm) and amorphous two-phase structure can be uniformly formed inside, so it is called nanocrystalline alloy or ultra-microcrystalline alloy. This two-phase structure makes it have excellent soft magnetic properties.

Iron-based nanocrystalline alloy strips have high saturation magnetic induction, high initial and maximum permeability, low coercivity, low loss, saturation magnetostriction coefficient approaching zero and excellent temperature stability, and permalloy and Co Amorphous alloys are comparable, but they have a higher saturation magnetic induction strength Bs (up to 1.3 T). They have largely replaced silicon steel sheets, permalloys, and ferrites, and are widely used in current systems and electronics.

Application area

◆ EMC filter common mode inductance core

◆ High frequency switching power supply transformer core

◆ High frequency inverter transformer core

◆ Magnetic core of precision current transformer

◆ Magnetic core of power system metering current transformer

◆ Zero sequence current transformer core

◆ Magnetic amplifier core