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High-saturation magnetic induction density iron cobalt-based nanocrystal soft magnetic powder core and preparation method thereof

A nanocrystalline soft magnetic and magnetic induction technology, applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve the problems of application limitations, high cost of iron-nickel-molybdenum magnetic powder cores, etc., and achieve excellent soft magnetic performance, Easy to form, 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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  • High-saturation magnetic induction density iron cobalt-based nanocrystal soft magnetic powder core and preparation method thereof
  • High-saturation magnetic induction density iron cobalt-based nanocrystal soft magnetic powder core and preparation method thereof
  • High-saturation magnetic induction density iron cobalt-based nanocrystal soft magnetic powder core and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Fe 5 co 82 Si 3 B 4 Cu 0.4 C 5.6 After the amorphous strip is kept at 420°C for 1 hour in a vacuum annealing furnace, it is mechanically crushed;

[0017] (2) Fe 5 co 82 Si 3 B 4 Cu 0.4 C 5.6 After the amorphous ribbon is mechanically crushed, it is placed in a planetary ball mill for ball milling, the ball-to-material ratio is 10:1, the ball milling time is 8 hours, the speed is 260r / min, and ethanol is added to prevent oxidation. After drying, it is screened to obtain different particle sizes. Fe 5 co 82 Si 3 B 4 Cu 0.4 C 5.6 magnetic powder;

[0018] (3) Different meshes of Fe 5 co 82 Si 3 B 4 Cu 0.4 C 5.6 Magnetic powder is mixed, of which -100 mesh ~ +200 mesh Fe 5 co 82 Si 3 B 4 Cu 0.4 C 5.6 Magnetic powder accounts for 15% of the total mass, -200 mesh to +300 mesh Fe 5 co 82 Si 3 B 4 Cu 0.4 C 5.6 Magnetic powder accounts for 70% of the total mass, -300 mesh to +400 mesh Fe 5 co 82 Si 3 B 4 Cu 0.4 C 5.6 Magnetic powder ...

Embodiment 2

[0023] (1) Fe 82 co 5 Si 3 B 4 Cu 1.5 P 4.5 After the amorphous strip is kept at 420°C for 1 hour in a vacuum annealing furnace, it is mechanically crushed;

[0024] (2) Fe 82 co 5 Si 3 B 4 Cu 1.5 P 4.5 After the amorphous ribbon is mechanically crushed, it is placed in a planetary ball mill for ball milling, the ball-to-material ratio is 10:1, the ball milling time is 8 hours, the speed is 260r / min, and ethanol is added to prevent oxidation. After drying, it is screened to obtain different particle sizes. Fe 82 co 5 Si 3 B 4 Cu1.5 P 4.5 magnetic powder;

[0025] (3) Different meshes of Fe 82 co 5 Si 3 B 4 Cu 1.5 P 4.5 Magnetic powder is mixed, of which -100 mesh ~ +200 mesh Fe 82 co 5 Si 3 B 4 Cu 1.5 P 4.5 Magnetic powder accounts for 15% of the total mass, -200 mesh to +300 mesh Fe 82 co 5 Si 3 B 4 Cu 1.5 P 4.5 Magnetic powder accounts for 70% of the total mass, -300 mesh to +400 mesh Fe 82 co 5 Si 3 B 4 Cu 1.5 P 4.5 Magnetic powder ac...

Embodiment 3

[0030] (1) Fe 50 co 12.5 Si 15 B 13 Cu 1.5 Cr 8 After the amorphous strip is kept at 420°C for 1 hour in a vacuum annealing furnace, it is mechanically crushed;

[0031] (2) Fe 50 co 12.5 Si 15 B 13 Cu 1.5 Cr 8 After the amorphous ribbon is mechanically crushed, it is placed in a planetary ball mill for ball milling, the ball-to-material ratio is 10:1, the ball milling time is 8 hours, the speed is 260r / min, and ethanol is added to prevent oxidation. After drying, it is screened to obtain different particle sizes. Fe 50 co 12.5 Si 15 B 13 Cu 1.5 Cr 8 magnetic powder;

[0032] (3) Different meshes of Fe 50 co 12.5 Si 15 B 13 Cu 1.5 Cr 8 Magnetic powder is mixed, of which -100 mesh ~ +200 mesh Fe 50 co 12.5 Si 15 B 13 Cu 1.5 Cr 8 Magnetic powder accounts for 15% of the total mass, -200 mesh to +300 mesh Fe 50 co 12.5 Si 15 B 13 Cu 1.5 Cr 8 Magnetic powder accounts for 70% of the total mass, -300 mesh to +400 mesh Fe 50 co 12.5 Si 15 B 13 Cu...

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Abstract

The invention discloses a preparation method of a high-saturation magnetic induction density iron cobalt-based nanocrystal soft magnetic powder core. The compositions of the magnetic powder core meet the following molecular formula: FeaCobSicBdueMf, wherein M is C, P, Cr or Mn, and subscripts a, b, c, d, e and f are atomic percentages of corresponding elements respectively and meet the conditions that a is not less than 5 and not more than 82, b is not less than 5 and not more than 82, c is not less than 3 and not more than 15, d is not less than 4 and not more than 13, e is not less than 0.4 and not more than 1.5, f is not less than 2 and not more than 8, and the sum of a, b, c, d, e and f is equal to 100. The prepared magnetic powder core is higher in saturation magnetic induction density and Curie temperature and excellent in comprehensive soft magnetic performance.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to an iron-cobalt-based nanocrystalline soft magnetic powder core with high saturation magnetic induction 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 electro...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F41/02
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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