Soft magnetic material, powder magnetic core and method for manufacturing the same

A soft magnetic material, powder magnetic core technology, applied in inductance/transformer/magnet manufacturing, magnetic core/yoke, inorganic material magnetism, etc., to achieve high magnetic permeability, improved productivity and economy, and low loss of core resistance Effect

Inactive Publication Date: 2011-05-11
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] As shown in the prior art described above, the decrease in core resistance due to heat treatment and the accompanying increase in core loss can be suppressed by forming a film with improved heat resistance using a metal alkoxide, although This is well known, however, there is still room for improvement

Method used

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  • Soft magnetic material, powder magnetic core and method for manufacturing the same
  • Soft magnetic material, powder magnetic core and method for manufacturing the same
  • Soft magnetic material, powder magnetic core and method for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] First, pure iron with an insulating film (manufactured by Hoganas AB, trade name: Somaloy 700, average particle diameter 200 μm) was prepared as a core particle having soft magnetic particles mainly composed of iron and a layer of iron in the soft magnetic layer. An insulating film formed on the surface of a particle. Next, zirconium tetraacetylacetonate (zirconium tetraacetylacetonate), which is a metal complex, was put into toluene to prepare a coating liquid containing the metal complex. A coating solution containing a metal complex was coated on pure iron with an insulating film, and dried to form a coating layer, thereby producing the soft magnetic material of Example 1. In addition, the compounding quantity of the metal complex was 0.057 mol% at the ratio of zirconium to the iron contained in the pure iron with insulating film.

[0065] Thereafter, 0.1% by weight of zinc stearate was added as a lubricant to the soft magnetic material of Example 1, and the mixture...

Embodiment 2

[0068] Except that aluminum acetylacetonate was used instead of zirconium tetraacetylacetonate, the same treatment as in Example 1 was performed to produce the soft magnetic material of Example 2 and the powder magnetic core of Example 2. In addition, the compounding quantity of the metal complex was 0.285 mol% at the ratio of aluminum to the iron contained in the pure iron with insulating film.

Embodiment 3

[0070] The soft magnetic material of Example 3 and the powder magnetic core of Example 3 were produced by performing the same treatment as in Example 1 except that the temperature was raised to 600° C. during the heat treatment, and then kept at 600° C. for 1 hour.

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PUM

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Abstract

It is an object to provide a novel soft magnetic material that enables the fabrication of a powder magnetic core capable of suppressing degradation in performance due to a high-temperature treatment and achieving high core resistance and low loss. A soft magnetic material comprising: a core particle each having a soft magnetic particle comprising iron as a main component and an insulating film formed on a surface of the soft magnetic particle; and a coating layer formed on the core particle, wherein the coating layer comprises a metal complex having nonferrous central metal and at least one organic ligand.

Description

technical field [0001] The invention relates to a soft magnetic material, a powder magnetic core and a manufacturing method thereof. Background technique [0002] Conventionally, powder magnetic cores have been used as magnetic cores included in electromagnetic devices such as motors, generators, and reactors. In general, such powder cores are produced by molding soft magnetic materials (powder) formed of thin insulating films by phosphoric acid treatment, etc., for the purpose of improving insulation and increasing magnetic flux density. Iron is the main ingredient. In addition, after forming, heat treatment (annealing treatment) is performed in order to release compression deformation during forming and reduce iron loss (core loss). [0003] Powder magnetic core driven by AC magnetic field generally requires less core loss. Increasing the heat treatment temperature is effective to reduce the loss of the iron core. However, the powder magnetic core made of iron powder su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/22H01F1/24H01F1/33H01F41/02B22F1/02B22F3/00B22F1/102B22F1/16
CPCB22F2003/145B22F2003/248B22F2998/10B22F2999/00C22C2202/02H01F1/24H01F1/26H01F3/08H01F41/0246Y10T428/2991B22F1/102B22F1/16B22F3/02B22F3/24B22F2201/02B22F3/14
Inventor 高桥毅野老诚吾
Owner TDK CORPARATION
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