Soft magnetic alloy powder, magnetic core, magnetic component, and electronic device
AssigneeTDK Corporation
InventorsMasakazu HOSONO, Kazuhiro YOSHIDOME, Akito HASEGAWA, Yoshiki KAJIURA
Life of this patent
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Abstract
A soft magnetic alloy powder comprises first particles to fifth particles, each having a particle size within a specific range. Among the first particles to the fifth particles, nth particles have an average particle size xn (μm), an average circularity yn, and a variance zn of circularity, where nth is any ordinal number from first to fifth. Points (xn, yn) (n=1 to 5) plotted in an xy plane define an approximate straight line having a slope “my” of −0.0030 or more. Points (xn, zn) (n=1 to 5) plotted in an xz plane define an approximate straight line having a slope “mz” of 0.00050 or less.
Claims5
A soft magnetic alloy powder comprising:
- first particles including soft magnetic alloy particles having a particle size of D50 or less;
- second particles including soft magnetic alloy particles having a particle size of more than D50 and D60 or less;
- third particles including soft magnetic alloy particles having a particle size of more than D60 and D70 or less;
- fourth particles including soft magnetic alloy particles having a particle size of more than D70 and D80 or less;
- and
- fifth particles including soft magnetic alloy particles having a particle size of more than D80 and D90 or less,
- wherein
- nth particles among the first particles to the fifth particles have an average particle size xn (μm), an average circularity yn, and a variance zn of circularity, where nth is any ordinal number from first to fifth;
- points (xn, yn) (n=1 to 5) plotted in an xy plane define an approximate straight line having a slope “my” of −0.0030 or more;
- and
- points (xn, zn) (n=1 to 5) plotted in an xz plane define an approximate straight line having a slope “mz” of 0.00050 or less.
A magnetic core comprising:
- first particles including soft magnetic alloy particles having a particle size of D50 or less;
- second particles including soft magnetic alloy particles having a particle size of more than D50 and D60 or less;
- third particles including soft magnetic alloy particles having a particle size of more than D60 and D70 or less;
- fourth particles including soft magnetic alloy particles having a particle size of more than D70 and D80 or less;
- and
- fifth particles including soft magnetic alloy particles having a particle size of more than D80 and D90 or less,
- wherein
- nth particles among the first particles to the fifth particles have an average particle size Xn (μm), an average circularity Yn, and a variance Zn of circularity, where nth is any ordinal number from first to fifth;
- points (Xn, Yn) (n=1 to 5) plotted in an XY plane define an approximate straight line having a slope “mY” of −0.0030 or more;
- and
- points (Xn, Zn) (n=1 to 5) plotted in an XZ plane define an approximate straight line having a slope “mZ” of 0.00050 or less.
Dependencies are inferred from the claim text.