Low-loss Fe-based nanocrystalline soft magnetic powder core and manufacturing method thereof

A magnetic powder core and nanocrystalline technology, which is applied in the field of low-loss Fe-based nanocrystalline magnetic powder core and its preparation, can solve the problems of application limitation, high cost of iron-nickel-molybdenum magnetic powder core, etc., and achieve easy molding, environmental protection and simple process Effect

Inactive Publication Date: 2013-09-18
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, iron-nickel-molybdenum alloy magnetic powder cores occupy a major share in the high-end market, but their application has been limited due to the high cost of iron-nickel-molybdenum magnetic powder cores

Method used

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  • Low-loss Fe-based nanocrystalline soft magnetic powder core and manufacturing method thereof
  • Low-loss Fe-based nanocrystalline soft magnetic powder core and manufacturing method thereof
  • Low-loss Fe-based nanocrystalline soft magnetic powder core and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Fe 70 Si 15 B 4 Cu 0.4 m 8 Y 2.6 After the amorphous strip is kept at 420°C for 1 hour in a vacuum annealing furnace, it is mechanically crushed;

[0017] (2) Fe 70 Si 15 B 4 Cu 0.4 m 8 Y 2.6 After mechanical crushing, the amorphous thin strips are placed in a planetary ball mill for ball milling, the ball-to-material ratio is 5:1, the ball milling time is 4 hours, the speed is 260r / min, and ethanol is added to prevent oxidation. After drying, different particle sizes are obtained by sieving Fe 70 Si 15 B 4 Cu 0.4 m 8 Y 2.6 magnetic powder;

[0018] (3) Different meshes of Fe 70 Si 15 B 4 Cu 0.4 m 8 Y 2.6 Magnetic powder is mixed, of which -100 mesh ~ +200 mesh Fe 70 Si 15 B 4 Cu 0.4 m 8 Y 2.6 Magnetic powder accounts for 15% of the total mass, -200 mesh to +300 mesh Fe 70 Si 15 B 4 Cu 0.4 m 8 Y 2.6 Magnetic powder accounts for 70% of the total mass, -300 mesh to +400 mesh Fe 70 Si 15 B 4 Cu 0.4 m 8 Y 2.6 Magnetic powder acco...

Embodiment 2

[0023] (1) Fe 90 Si 2 B 4 Cu 1 P 2 Y 1 After the amorphous strip is kept at 420°C for 1 hour in a vacuum annealing furnace, it is mechanically crushed;

[0024] (2) Fe 90 Si 2 B 4 Cu 1 P 2 Y 1 After mechanical crushing, the amorphous thin strips are placed in a planetary ball mill for ball milling, the ball-to-material ratio is 5:1, the ball milling time is 4 hours, the speed is 260r / min, and ethanol is added to prevent oxidation. After drying, different particle sizes are obtained by sieving Fe 90 Si 2 B 4 Cu1 P 2 Y 1 magnetic powder;

[0025] (3) Different meshes of Fe 90 Si 2 B 4 Cu 1 P 2 Y 1 Magnetic powder is mixed, of which -100 mesh ~ +200 mesh Fe 90 Si 2 B 4 Cu 1 P 2 Y 1 Magnetic powder accounts for 15% of the total mass, -200 mesh to +300 mesh Fe 90 Si 2 B 4 Cu 1 P 2 Y 1 Magnetic powder accounts for 70% of the total mass, -300 mesh to +400 mesh Fe 90 Si 2 B 4 Cu 1 P 2 Y 1 Magnetic powder accounts for 10% of the total mass, -400 ...

Embodiment 3

[0030] (1) Fe 60 Si 11 B 13 Cu 3 Cr 8 Y 5 After the amorphous strip is kept at 420°C for 1 hour in a vacuum annealing furnace, it is mechanically crushed;

[0031] (2) Fe 60 Si 11 B 13 Cu 3 Cr 8 Y 5 After mechanical crushing, the amorphous thin strips are placed in a planetary ball mill for ball milling, the ball-to-material ratio is 5:1, the ball milling time is 4 hours, the speed is 260r / min, and ethanol is added to prevent oxidation. After drying, different particle sizes are obtained by sieving Fe 60 Si 11 B 13 Cu 3 Cr 8 Y 5 magnetic powder;

[0032] (3) Different meshes of Fe 60 Si 11 B 13 Cu 3 Cr 8 Y 5 Magnetic powder is mixed, of which -100 mesh ~ +200 mesh Fe 60 Si 11 B 13 Cu 3 Cr 8 Y 5 Magnetic powder accounts for 15% of the total mass, -200 mesh to +300 mesh Fe 60 Si 11 B 13 Cu 3 Cr 8 Y 5 Magnetic powder accounts for 70% of the total mass, -300 mesh to +400 mesh Fe 60 Si 11 B 13 Cu 3 Cr 8 Y 5 Magnetic powder accounts for 10% o...

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Abstract

The invention discloses a low-loss Fe-based nanocrystalline soft magnetic powder core and a manufacturing method thereof. The ingredient of the alloy powder core forming the powder core is FeaSibBcCudMeYf, wherein M refers to C, P, Cr or Mn, the subscripts a, b, c, d, e, f represent corresponding atomic percent of alloying elements, and the following formulas are met: a is not less than 70 and not more than 90, b is not less than 2 and not more than 15, c is not less than 4 and not more than 13, d is not less than 0.4 and not more than 3, e is not less than 2 and not more than 8, f is less than 0 and not more than 5, and besides, the total percent of a, b, c, d, e and f equals to 100. The prepared magnetic powder core has smaller eddy-current loss, the preparation technology is simple, the formation is easy, the environmental protection is facilitated, and a certain cost advantage is guaranteed.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a low-loss Fe-based nanocrystalline magnetic powder core and a preparation method thereof. Background technique [0002] Soft magnetic powder cores are widely used in electronic information, electrical engineering and medium and high frequency fields. With the development of the electronic industry, the requirements for the miniaturization of electronic products are getting higher and higher. In recent decades, in order to meet the development of the electronics industry, researchers from various countries have used different methods to prepare various soft magnetic powder cores with different magnetic properties. These magnetic powder cores are widely used in filters, frequency modulation choke coils and switching power supplies. [0003] In 1921, Arnold and G.W.Elmen of the Westinghouse Company of the United States pressed electrolytic iron powder into a magnetic powder core ...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F27/255H01F41/02
Inventor 严密熊亚东张念伟赵国梁姜银珠周连明曹阳林坤
Owner ZHEJIANG UNIV
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