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Amorphous alloy powder, dust core, magnetic element, and electronic device

An amorphous alloy, powder magnetic core technology, applied in the powder magnetic core, magnetic components and electronic equipment, amorphous alloy powder field, can solve high magnetic permeability, hindered magnetic properties, Fe-based amorphous alloy magnetostriction Scaling and higher problems

Active Publication Date: 2014-09-03
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the magnetostriction of Fe-based amorphous alloys is high
Therefore, there is a problem in magnetic devices formed of Fe-based amorphous alloys that beating occurs at a specific frequency and at the same time hinders the improvement of magnetic characteristics (such as high magnetic permeability and low coercive force)

Method used

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  • Amorphous alloy powder, dust core, magnetic element, and electronic device
  • Amorphous alloy powder, dust core, magnetic element, and electronic device
  • Amorphous alloy powder, dust core, magnetic element, and electronic device

Examples

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no. 1 approach

[0089] First, a first embodiment of the amorphous alloy powder of the present invention will be described.

[0090] The amorphous alloy powder of the present embodiment is composed of alloy with Fe 100-a-b-c-d-e Cr a mn b Si c B d C e (a, b, c, d, and e are all powders composed of amorphous alloy materials represented by the content rate (atomic %)). Also, a, b, c, d, and e satisfy the relationships of 1≤a≤3, 0.1≤b≤3, 10≤c≤14, 8≤d≤13, and 1≤e≤3.

[0091] That is to say, the amorphous alloy powder of this embodiment is mainly composed of Fe, the content of Cr is 1 atomic % to 3 atomic %, the content of Mn is 0.1 atomic % to 3 atomic %, and the content of Si is 0.1 atomic % to 3 atomic %. The ratio is 10 atomic % to 14 atomic %, the B content is 8 atomic % to 13 atomic %, and the C content is 1 atomic % to 3 atomic %.

[0092]Thereby, when used as a magnetic core, an amorphous alloy powder having further reduced iron loss and further improved magnetic properties can be ob...

no. 2 approach

[0125] Next, a second embodiment of the amorphous alloy powder of the present invention will be described.

[0126] Hereinafter, the amorphous alloy powder of the present embodiment will be described mainly in terms of differences from the amorphous alloy powder of the first embodiment, and descriptions of the same matters will be omitted.

[0127] The main component of the amorphous alloy powder according to this embodiment is Fe, the Cr content is 1 atomic % to 2.5 atomic %, the Mn content is 1 atomic % to 3 atomic %, and the Si content is 10 atomic %. 14 atomic % or less, B content rate of 8 atomic % or more and 13 atomic % or less, and C content rate of 1 atomic % or more and 3 atomic % or less are composed of an amorphous alloy material. Moreover, when the content of Cr in the amorphous alloy material is a atomic %, the content of Mn is b atomic %, and the content of C is e atomic %, the value of e / (a+b) satisfies 0.2 to 0.95 the following relationship.

[0128] Since t...

no. 3 approach

[0151] Next, a third embodiment of the amorphous alloy powder of the present invention will be described.

[0152] Hereinafter, the amorphous alloy powder of the present embodiment will be described mainly in terms of differences from the amorphous alloy powders of the first and second embodiments, and descriptions of the same matters will be omitted.

[0153] The amorphous alloy powder of this embodiment is mainly composed of Fe, the content of Cr is 2 atomic % to 3 atomic %, the content of Mn is 0.02 atomic % to less than 1 atomic %, and the content of Si is 10 atomic %. It is composed of an amorphous alloy material having an atomic % to 14 atomic %, a B content of 8 atomic % to 13 atomic %, and a C content of 1 atomic % to 3 atomic %. Moreover, when the content of Cr in the amorphous alloy material is a atomic %, the content of Mn is b atomic %, and the content of C is e atomic %, the value of e / (a+b) satisfies 0.3 to 0.95 the following relationship.

[0154] Since this a...

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Abstract

The invention provides an amorphous alloy powder, a dust core, a magnetic element, and an electronic device. The amorphous alloy powder is composed of an amorphous alloy material containing Fe, Cr, Mn, Si, B, and C as constituent components, and in the amorphous alloy material, Fe is contained as a main component, the content of Cr is 0.5 at % or more and 3 at % or less, the content of Mn is 0.02 at % or more and 3 at % or less, the content of Si is 10 at % or more and 14 at % or less, the content of B is 8 at % or more and 13 at % or less, and the content of C is 1 at % or more and 3 at % or less. By using such an amorphous alloy powder, a dust core which reduces iron loss and decreases magnetostriction can be obtained.

Description

technical field [0001] The invention relates to amorphous alloy powder, powder magnetic core, magnetic element and electronic equipment. Background technique [0002] In recent years, the trend of miniaturization and weight reduction of mobile devices such as notebook computers is evident. Moreover, the performance of notebook computers is constantly improving in order to match the performance of desktop computers. [0003] Therefore, in order to reduce the size and performance of mobile devices, it is necessary to increase the frequency of switching power supplies. At present, the drive frequency of switching power supplies has been increased to about several hundred kHz. With the increase in the frequency of switching power supplies, it is necessary to increase the drive frequency of magnetic components such as choke coils and inductors built into mobile devices. [0004] For example, Patent Document 1 discloses an amorphous material composed of Fe, M (M is at least one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/153H01F1/20C22C45/02B22F1/00H01F3/08H01F27/255
CPCH01F3/08H01F1/20C22C45/02H01F1/15308B22F9/002B22F9/305H01F1/14766H01F41/0246B22F9/082H01F1/06C22C33/0278
Inventor 大塚勇前田优佐藤冬乙
Owner SEIKO EPSON CORP
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