Iron-based nano-crystalline magnetically-soft alloy having high saturation magnetic induction intensity

An iron-based nanocrystal, magnetic induction technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., to achieve the effect of high saturation magnetic induction, strong amorphous forming ability, and low coercivity

Inactive Publication Date: 2010-09-22
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In summary, there is currently a lack of nanocrystalline soft magnetic alloys and their products with

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  • Iron-based nano-crystalline magnetically-soft alloy having high saturation magnetic induction intensity
  • Iron-based nano-crystalline magnetically-soft alloy having high saturation magnetic induction intensity
  • Iron-based nano-crystalline magnetically-soft alloy having high saturation magnetic induction intensity

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Embodiment Construction

[0016] In the iron-based nanocrystalline alloy with high saturation magnetic induction of the present invention, M elements (P, Si, N, Sn, Ge, Ga, Al) are commonly used elements to form amorphous alloys, such as Si, P, Ge elements Adding an appropriate amount of Ge can not only improve the amorphous forming ability of the alloy, but also improve the thermal stability and Curie temperature of the alloy, and Ge can also increase the saturation magnetization of the alloy. Although Al is a metal element, it has the properties of a metal-like element. It is because of this dual property that Al has a non-positive mixing enthalpy with almost all elements, and the addition of Al improves the amorphous formation ability of the alloy system. In addition, studies have shown that Al can also reduce the coercive force of the alloy, refine the nanocrystalline grains, and reduce the loss. Chinese patent CN1173061C points out that Sn is an alloying element, which can lower the melting point...

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Abstract

The invention provides an iron-based nano-crystalline magnetically-soft alloy having high saturation magnetic induction intensity. The iron-based nano-crystalline magnetically-soft alloy is characterized in that the atomic composition thereof by percentage (%) is shown in the following formula: FeTaBbCucCdMe, wherein T represents at least one selected from Zr, Ti, Ta, Hf, Nb, V, W, Mo and Cr; M represents at least one selected from P, Si, N, Sn, Ge, Ga and Al; the subscripts, i.e., a to e in the formula, indicate the atomic percentage (%) and meet the following conditions: a is larger than or equal to 0.002 and less than or equal to 5, b is larger than or equal to 2 and less than or equal to 18, c is larger than or equal to 0.02 and less than or equal to 5, d is larger than or equal to 0.002 and less than or equal to 3, and e is larger than or equal to 0.02 and less than or equal to 20; and Fe and other unavoidable impurities constitute the balancing amount. The magnetically-soft alloy of the invention has the characteristics of high glass-forming ability, high saturation magnetic induction intensity and good soft magnetic performance; and particularly, the saturation magnetic induction intensity of the annealed alloy is higher than 1.5T, and the coercive force thereof is lower than 15A/m.

Description

technical field [0001] The invention relates to the field of magnetic functional materials, in particular to an iron-based nanocrystalline soft magnetic alloy with high saturation magnetic induction. Background technique [0002] After the advent of iron-based nanocrystalline soft magnetic materials, due to their high magnetic permeability, low coercive force, and low high-frequency loss, coupled with their excellent thermal stability and high cost performance, they are considered to be ideal for making switching power supplies, pulse Ideal material for transformer cores, transformers, magnetic amplifiers, spike suppressors, differential mode inductor cores and reactor cores. [0003] However, compared with the commercially available silicon steel sheet, the iron-based nanocrystalline alloy still has its disadvantages, that is, the saturation magnetic induction is relatively low. For example, B of crystalline grain-oriented silicon steel s The value is about 2T, while the ...

Claims

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Application Information

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IPC IPC(8): H01F1/147C22C38/18C22C38/38C22C38/14C22C38/04
Inventor 周少雄董帮少陈文智刘国栋卢志超李德仁
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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