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Iron-cobalt-based nano-crystalline soft magnetic alloy and preparation method thereof

A nanocrystalline soft magnetic, iron-cobalt-based technology, used in magnetic materials, magnetic objects, electrical components, etc., can solve the problems of high iron loss, loss of magnetism, and high coercivity, and achieve high saturation magnetic induction intensity and Curie temperature. High, soft magnetic performance excellent effect

Active Publication Date: 2011-11-23
朗峰新材料(菏泽)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above two types of materials can only be used below 200°C due to the limitation of the Curie temperature of their amorphous phase and nanocrystalline phase, and will lose their magnetism in high temperature environments
[0005] HITPERM alloy system, although its Curie temperature and saturation magnetization are higher, and its high-frequency characteristics are better than NANOPERM alloy, but its coercive force is as high as 200A / m, and its iron loss is also higher.

Method used

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  • Iron-cobalt-based nano-crystalline soft magnetic alloy and preparation method thereof
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  • Iron-cobalt-based nano-crystalline soft magnetic alloy and preparation method thereof

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Embodiment 1

[0036] The molecular formula of the iron-cobalt-based nanocrystalline alloy with high Curie temperature and high saturation magnetic induction of this embodiment is expressed as Fe 42 co 42 Nb 7 B 8 Cu 1 , the preparation steps are as follows: prepare 15g of raw materials Fe, Co, Nb, B, Cu with a purity greater than 99% according to the composition of the iron-cobalt-based nanocrystalline alloy of this embodiment, and then use an arc melting furnace to smelt under the protection of argon, so that The ingredients in the alloy are mixed evenly.

[0037] The alloy ingot is crushed and loaded into a quartz tube, and the strip is thrown at a speed of 40m / s in an Ar atmosphere by using a single-roller quenching and stripping process to obtain an amorphous alloy strip with a width of about 1.2mm and a thickness of about 26μm;

[0038] Place the amorphous strips in a quartz tube and evacuate to 3 × 10 -3 Below Pa, then close the quartz tube; place the quartz tube in a heat treatm...

Embodiment 2

[0044] The molecular formula of the iron-cobalt-based nanocrystalline alloy of the present embodiment is expressed as Fe 42.8 co 42.8 Nb 3.3 Zr 3.3 B 6.8 Cu 1 , the preparation steps are as follows: the raw materials Fe, Co, Nb, Zr, B, Cu with a purity greater than 99%, are prepared according to the composition of the iron-cobalt-based nanocrystalline alloy of this embodiment 15g, and then carried out under the protection of argon with an electric arc melting furnace Smelting, so that the ingredients in the alloy are mixed evenly.

[0045] The alloy ingot was crushed and loaded into a quartz tube, and the single-roller quenching and spinning process was used to spin the strip at a speed of 40m / s in an Ar atmosphere to obtain an amorphous alloy strip with a width of about 1.3mm and a thickness of about 25μm.

[0046] Place the amorphous strips in a quartz tube and evacuate to 8×10 -3 Below Pa, then close the quartz tube; place the quartz tube in a heat treatment furnace a...

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Abstract

The invention discloses iron-cobalt-based nano-crystalline soft magnetic alloy, comprising the following components by mole percent: 40-42.8% of Fe, 40-42.8% of Co, 5-8% of M, 5-12% of B, and 0.1-1.5% of Cu, wherein M is at least one of Nb, Zr, Hf, Mo, W and Ta. The invention further discloses a method for preparing the soft magnetic alloy. Compared with the prior art, the invention has the advantages that the iron cobalt-based nano-crystalline soft magnetic alloy prepared by an amorphous solid crystallization method according to a rational preferable mixture ratio has the characteristics of high Curie temperature, high saturation magnetic induction intensity and excellent soft magnetic performance.

Description

technical field [0001] The invention relates to an iron-cobalt-based nanocrystalline soft magnetic alloy, and also relates to a preparation method of the iron-cobalt-based nanocrystalline soft magnetic alloy. Background technique [0002] Soft magnetic materials are the earliest developed and most diverse type of magnetic functional materials, which require magnetic properties such as low coercive force, high magnetic permeability, high saturation magnetization and low iron loss, and have a wide range of applications in electrical and electronic equipment. application. Research on nanocrystalline soft magnetic materials began in 1988. Nanocrystalline soft magnetic material is a new type of soft magnetic material, which is composed of an amorphous matrix and nano-scale fine grains distributed on the amorphous matrix, and can be obtained by partial crystallization of amorphous alloys. Its soft magnetic properties combine many advantages of traditional soft magnetic materials...

Claims

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Application Information

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IPC IPC(8): H01F1/147C22C1/02
Inventor 沈宝龙孔凡利张明晓
Owner 朗峰新材料(菏泽)有限公司