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High-magnetic-inductance high-frequency iron-based nanocrystalline soft magnetic alloy and preparation method thereof

An iron-based nanocrystalline and soft magnetic alloy technology, applied in magnetic materials, magnetic objects, electrical components, etc., can solve the problems of performance influence, uneven heating, etc., achieve high thermal stability, good high-frequency characteristics, and reduce precious metals. The effect of content

Active Publication Date: 2019-10-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] In addition, in the industry, nanocrystalline alloys are put into use in the form of wound iron cores, and uneven heating has a fatal impact on their performance.

Method used

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  • High-magnetic-inductance high-frequency iron-based nanocrystalline soft magnetic alloy and preparation method thereof
  • High-magnetic-inductance high-frequency iron-based nanocrystalline soft magnetic alloy and preparation method thereof
  • High-magnetic-inductance high-frequency iron-based nanocrystalline soft magnetic alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this embodiment, the chemical molecular formula of the iron-based nanocrystalline soft magnetic alloy material is: Fe 76 Si 12 B 8.5 P 0.5 Nb 1.4 V 0.1 Mo 0.5 Cu 1 .

[0049] The concrete preparation method of this iron-based nanocrystalline alloy is as follows:

[0050] Step 1: Raw materials Fe, Si, B, Fe3P, Nb, FeV, Mo, Cu with a purity greater than 99.8% are formulated according to the compositional formula Fe 76 Si 12 B 8.5 P 0.5 Nb 1.4 V 0.1 Mo 0.5 Cu 1 carry out ingredients;

[0051] Step 2: Put the proportioned raw materials into the cleaned alumina crucible in the induction melting furnace, evacuate to lower than -0.002Pa, and then fill in argon until the pressure is -0.05Pa for melting, and the melting temperature is 1300°C, keep warm for 5 minutes after melting, then pour the molten alloy ingot into a copper mold and cool for 20 minutes to obtain an alloy ingot with uniform composition;

[0052] Step 3: Put the alloy ingot obtained in step ...

Embodiment 2

[0061] In this embodiment, the chemical molecular formula of the iron-based nanocrystalline soft magnetic alloy material is: Fe 76 Si 12 B 8.5 P 0.5 Nb 1.6 V 0.2 Mo 0.2 Cu 1 .

[0062] The specific preparation method of this iron-based nanocrystalline alloy is basically the same as the steps of Example 1 as follows, and it is also necessary to pay attention to the accuracy of the quality when weighing, and to carry out under an inert atmosphere (Ar) during induction smelting and rapid quenching. Carry out various magnetic properties and microstructure observation afterwards, and the place different from embodiment 1 step is that the selected melting temperature selection is 1400 ℃ during smelting, and the selection of inner and outer pressure difference of quartz tube is 250Pa when throwing belt, and the heating rate during annealing is 2°C / min.

[0063] The XRD pattern of the quenched alloy strip and the alloy strip after heat treatment was tested by D8 Advance polycr...

Embodiment 3

[0068] In this embodiment, the chemical molecular formula of the iron-based nanocrystalline soft magnetic alloy material is: Fe 76 Si 12 B 8.2 P 0.8 Nb 1.2 V 0.2 Mo 0.6 Cu 1 .

[0069] The concrete preparation method of this iron-based nanocrystalline alloy is as follows the same as the step of embodiment 1, need to pay attention to the accuracy of quality when weighing equally, and carry out under inert atmosphere (Ar) when induction smelting and quick quenching strip, after that Carry out each magnetic property and microscopic structure observation and embodiment 1 and 2 steps difference place is that the melting temperature selected during smelting is selected as 1500 ℃, and the pressure difference inside and outside the quartz tube is selected as 350Pa when the band is thrown, and the heating rate during annealing is 4°C / min.

[0070] The XRD pattern of the quenched alloy strip and the alloy strip after heat treatment was tested by D8 Advance polycrystalline X-ray ...

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Abstract

The invention discloses a high-magnetic-inductance high-frequency iron-based nanocrystalline soft magnetic alloy and a preparation method thereof. The molecular formula of the iron-based nanocrystalline soft magnetic alloy is FeaSibBcPdNbeVfMogCuh, the a, the b, the c, the d, the e, the f, the g and the h in the molecular formula correspondingly represent the atomic percentage contents of all thecorresponding alloy elements, and satisfy the following conditions that the a is greater than or equal to 75.5 and less than or equal to 77.5, the b is greater than or equal to 8.5 and less than or equal to 13.5, the c is greater than or equal to 7 and less than or equal to 10, the d is greater than or equal to 0.2 and less than or equal to 1, the e is greater than or equal to 1.0 and less than orequal to 1.7, the f is greater than or equal to 0.05 and less than or equal to 0.4, the g is greater than or equal to 0.1 and less than or equal to 1.5, the h is greater than or equal to 0.8 and lessthan or equal to 1.2, and the sum of the a, the b, the c, the d, the e, the f, the g and the h is 100. The high-magnetic-inductance high-frequency iron-based nanocrystalline soft magnetic alloy material has the advantages of excellent comprehensive soft magnetic performance, low cost, high thermal stability and the like, particularly, the high-frequency performance is good, the magnetic conductivity under the condition of 10 kHz can reach 28000 or above, a good application prospect is achieved, and the high-magnetic-inductance high-frequency iron-based nanocrystalline soft magnetic alloy material can be applied to the technical fields of high-frequency transformers, common mode chokes, wireless charging and the like.

Description

technical field [0001] The invention relates to the technical field of iron-based nanocrystalline soft magnetic alloy materials, in particular to a high magnetic induction and high-frequency iron-based nanocrystalline soft magnetic alloy and a preparation method thereof. Background technique [0002] As important functional materials, soft magnetic alloys have been receiving close attention. Until 1988, Yoshizawa et al. of Hitachi Metals Corporation of Japan discovered the Fe-Si-B-Nb-Cu nanocrystalline system with excellent soft magnetic properties and named it Finemet. This material has attracted great attention worldwide. Therefore, Nanoperm (Fe88Zr6B6), Hitperm ((Fe0.5Co0.5)88Zr6B6), Nanomet (Fe83Cu1Si2 B (P, C)) have been developed successively, and recently a series of nanocrystalline alloys with excellent laboratory performance have been developed, such as FeSiPCCu, FeSiBPC, FeSiBCCu, etc. Compared with other alloys, Finemet alloy has excellent comprehensive soft mag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/12C22C38/16C22C45/02C21D1/773C21D1/18H01F1/153
CPCC21D1/18C21D1/773C22C33/003C22C38/002C22C38/02C22C38/12C22C38/16C22C38/32C22C45/02C22C2200/04H01F1/15333
Inventor 王安定肖恢芸贺爱娜刘新才董亚强满其奎李润伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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