Soft Magnetic Powder, Powder Magnetic Core, Magnetic Element, And Electronic Device
AssigneeSeiko Epson Corporation
InventorsMayu WATANABE, Mitsutaka INUI
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Abstract
A soft magnetic powder has a composition represented by FexCuaNbb(Si1-y(B1-zCrz)y)100-x-a-b [where a, b, x, y, and z satisfy 0.3≤a≤2.0, 2.0≤b≤4.0, 75.5≤x≤79.5, 0.55≤y≤0.91, and 0.015≤z≤0.185], and includes an amorphous phase and a crystalline phase, wherein defining a content of Cr determined by OES as X(Cr), and a content of Cr and a content of B in the amorphous phase determined by EDX as Y(Cr) and Y(B), the formulas (1) and (2) are satisfied: X ( Cr ) < Y ( Cr ) ≤ X ( Cr ) + 1. ( 1 ) 3. ≤ Y ( B ) ≤ 15. . ( 2 )
Claims7
A soft magnetic powder in which a composition determined by an optical emission spectrometer (OES) is represented by a composition formula in an atomic number ratio FexCuaNbb (Si1-y(B1-zCrz)y)100-x-a-b, wherein
- a, b, x, y, and z satisfy
- 0.3
- ≤
- a
- ≤
- 2.
- ,
- 2.
- ≤
- b
- ≤
- 4.
- ,
- 75.5
- ≤
- x
- ≤
- 79.5
- ,
- 0.55
- ≤
- y
- ≤
- 0.91
- ,
- and
- 0.015
- ≤
- z
- ≤
- 0.185
- ,
- the soft magnetic powder comprising:
- an amorphous phase which is formed of an amorphous structure in which Fe is an element highest in concentration;
- and
- a crystalline phase which is formed of a crystalline structure in which Fe is an element highest in concentration, wherein
- defining a content [at %] of Cr determined by the optical emission spectrometer (OES) as X(Cr), and a content [at %] of Cr and a content [at %] of B in the amorphous phase determined by an energy dispersive X-ray fluorescence spectrometer (EDX) as Y(Cr) and Y(B), the following formulas (1) and (2) are satisfied,
- X
-
- (
- Cr
- )
- <
- Y
-
- (
- Cr
- )
- ≤
- X
-
- (
- Cr
- )
- +
- 1.
- (
- 1
- )
- 3.
- ≤
- Y
-
- (
- B
- )
- ≤
- 15.
- (
- 2
- )
Dependencies are inferred from the claim text.