A nanocrystalline magnetic core with linear magnetic permeability and its preparation method

Abstract

The invention provides a nano-crystal magnetic core with linear magnetic conductivity and a preparation method thereof. The magnetic core is prepared by winding a strip containing nano-crystal components into an annular shape, wherein the strip comprises an alloy of following metal elements, and the molecular formula of the alloy is FeaCubSicBdCeMfm'g; by atomic percent, a, b, c, d, e, f and g meet the following conditions that: b is more than or equal to 0.5 and smaller than or equal to 1.5, c is more than or equal to 9.0 and smaller than or equal to 18, d is more than or equal to 5.0 and smaller than or equal to 12, e is more than or equal to 0.1 and smaller than or equal to 1.2, f is more than or equal to 0.5 and smaller than or equal to 5.0, g is more than or equal to 2.0 and smaller than or equal to 4.0 and a is equal to 100-(b+c+d+e+f+g); and a microstructure of a utilization state of the alloy is a mixed phase taking a nano-crystal as a main body. A hysteresis loop of the nano-crystal magnetic core prepared by specific element composition and reaction conditions is close to be linear; the magnetic conductivity of the magnetic core is 5500-25000 and the value of coercive force magnetic field intensity is smaller than 2Am<-1>; the nano-crystal magnetic core has moderate magnetic conductivity, a relatively strong anti-saturation property, relatively low magnetic core loss and low high-frequency magnetic core loss, and can be widely applied to large-power common modes and high-frequency transformer iron cores.

Description

technical field [0001] The invention relates to the technical field of soft magnetic materials, in particular to a nanocrystalline soft magnetic core with linear magnetic permeability, high magnetic permeability and high anti-saturation performance and a preparation method thereof. Background technique [0002] Soft magnetic materials are magnetic materials with low coercive force and high magnetic permeability. Soft magnetic materials are easy to magnetize and demagnetize, so they are widely used in electrical equipment and electronic equipment. Among them, iron-based amorphous alloy is a commonly used iron core soft magnetic material, which is mainly composed of Fe element and Si and B-type metal elements. It has high saturation magnetic induction, high magnetic permeability and low core loss, etc. Features, can be widely used in distribution transformers, high-power switching power supplies, pulse transformers, magnetic amplifiers, intermediate frequency transformers and ...

AI Technical Summary

Problems solved by technology

However, how to obtain a nanocrystalline magnetic core with relatively high moderate and linear magnetic permeability and good anti-saturation characteristics by preparing an anti-saturation common-mode iron core has no good solution in the prior art.

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