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Soft magnetic alloy powder and dust core using same

A soft magnetic alloy, powder technology, applied in magnetic objects, magnetic materials, magnetic core/yoke and other directions, can solve the problem of Fe-based nanocrystalline soft magnetic alloy powder magnetic anisotropy increasing, Fe-based nanocrystalline soft magnetic alloy The problem of increased powder loss, etc., achieves high saturation magnetic flux density, excellent soft magnetic properties, and the effect of reducing loss

Inactive Publication Date: 2019-01-15
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] When above-mentioned any situation takes place, the magnetic anisotropy of Fe-based nanocrystalline soft magnetic alloy powder all becomes large, and the loss of Fe-based nanocrystalline soft magnetic alloy powder increases

Method used

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  • Soft magnetic alloy powder and dust core using same
  • Soft magnetic alloy powder and dust core using same

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Embodiment approach

[0030] The alloy powder in the embodiment is an Fe-based nanocrystalline soft magnetic alloy powder obtained by pulverizing an Fe-based amorphous soft magnetic alloy ribbon and then heating to precipitate an αFe crystal phase in the amorphous.

[0031] In addition, the ribbon is an Fe-based amorphous soft magnetic alloy ribbon that is pulverized to produce alloy powder. The material of the alloy powder in the embodiment is Fe-based nanocrystalline soft magnetic alloy powder, which can obtain excellent magnetic properties with high saturation magnetic flux density and low loss. The manufacturing method will be described separately below.

[0032] As the Fe-based alloy powder, in addition to the Fe-Si-B alloy, Fe-Si-B alloys, Fe-Cr-P alloys, Fe-Cr-P alloys, Fe -Zr-B alloys, FeSiAl alloys, etc.

[0033]

[0034] figure 1 It is a schematic diagram of the DSC (differential scanning calorimetry: Differential scanning calorimetry) curve of the Fe-based nanocrystalline soft m...

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Abstract

The invention provides a soft magnetic alloy powder that can exhibit a high saturation flux density and desirable soft magnetic characteristics and a dust core using the same. The soft magnetic alloypowder is an Fe-based nanocrystalline soft magnetic alloy powder of a crystallized Fe-based amorphous soft magnetic alloy powder, and has a DSC curve with a first peak that is 15% or less of a first peak of the Fe-based amorphous soft magnetic alloy in terms of a maximum value, the DSC curve of the Fe-based nanocrystalline soft magnetic alloy powder having a second peak occurring on a higher temperature side of the first peak of the Fe-based nanocrystalline soft magnetic alloy powder and having a maximum value that is 50% or more and 100% or less of a maximum value of a second peak of the Fe-based amorphous soft magnetic alloy occurring on a higher temperature side of the first peak of the Fe-based amorphous soft magnetic alloy.

Description

technical field [0001] The present invention relates to a soft magnetic alloy powder and a powder magnetic core using the same. In particular, the present invention relates to Fe-based nanocrystalline soft magnetic alloy powder for inductors such as choke coils, reactors, and transformers, a method for producing the same, and a powder magnetic core obtained by using Fe-based nanocrystalline soft magnetic alloy powder. Background technique [0002] In recent years, electrification of vehicles such as hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and electric vehicles (EV) has rapidly progressed. In order to further improve fuel efficiency, downsizing and weight reduction of systems are required in automobiles. Driven by this electrification market, miniaturization and weight reduction are required for various electronic components. Among them, soft magnetic alloy powder used in choke coils, reactors, transformers, etc., and powder cores using them ...

Claims

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Application Information

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IPC IPC(8): H01F1/153H01F27/255H01F41/02B22F1/00B22F1/142
CPCH01F1/15333H01F1/1535H01F27/255H01F41/0246B22F1/142B22F1/00B22F2998/10B22F2009/048B22F1/08C22C33/0207B22F2999/00H01F1/15308H01F3/08B22F9/04B22F2009/043B22F2009/044B22F2009/047C22C2200/02H01F1/147B22F2301/35
Inventor 小岛俊之前出正人
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD