Iron-based amorphous magnetically soft alloy with high saturation flux density and preparation method and application thereof

Abstract

The invention discloses an iron-based amorphous magnetically soft alloy with high saturation flux density and a preparation method and application thereof. The expression of the alloy is FeaSibBcGad,and a, b, c and d in the expression represent the atomic percent content of all corresponding components correspondingly, wherein a is 78, b ranges from 7.2 to 8.6, c ranges from 10.5 to 12.5, d ranges from 1-4, and a+b+c+d is equal to 100. According to the alloy, certain Ga capable of improving the value of saturated magnetic of an amorphous alloy is added into the Fe-Si-B series amorphous alloy,so that the alloy has high saturation flux density, low coercivity and high magnetic conductivity, and the preparation process is low in condition and good in moldability.

Description

technical field [0001] The invention belongs to the technical field of amorphous alloys, in particular to an iron-based amorphous soft magnetic alloy with high saturation magnetic induction and its preparation method and application. Background technique [0002] After the advent of iron-based amorphous-nanocrystalline soft magnetic materials, due to the special atomic structure of amorphous alloys (long-range disorder, short-range order), it has many properties superior to crystalline materials, such as high saturation magnetic induction, High magnetic permeability, low coercive force, low core loss, low excitation current and good stability, and the molding process is simple, without special processing technology, is widely used in distribution transformers, intermediate frequency power transformers, filter reactors Because of this, the development of iron-based amorphous-nanocrystalline soft magnetic materials has also promoted the development of transformers around the w...

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Problems solved by technology

[0003] Although the iron-based amorphous soft magnetic material has many excellent physical and chemical properties, it still has the following shortcomings compared with the silicon steel sheet widely used at present: (1) Compared with the silicon steel sheet (2.03T), the saturation magnetic induction exists There is a big gap. For example, the grade of iron-based amorphous alloys currently in industrial production is mainly Metglas2605SA1, and the composition is Fe 80 Si 9 B 11 (at%), its B S Only 1.56T (see Chinese patent CN101840764A), which limits the development of industrially produced amorphous transformers towards miniaturization, light weight, and energy saving; (2) The magnetic permeability is not high, and the magnetic permeability increases with the increase of operating frequency The index decreases and the high frequency stability is poor, so that the electronic devices under high frequency operation cannot be widely used, and the high initial permeability can effectively reduce the excitation current and excitation power applied to the soft magnetic material during use, thereby reducing The loss during the use of materials; based on this, researchers from various countries have used various methods to improve the soft magnetic properties and corrosion resistance of FeSiB-based amorphous alloy strips, such as adding Co, Ni, Mo, Cr, Cu to FeSiB , Mo and other alloying elements, some of which are added separately, and some are added jointly

This is difficult to meet its requirements in the existing technology of industrial production, and cannot be applied industrially

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