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US 2021/0276093 A1Published application
Magnetic Powder, Magnetic Powder Molded Body, And Method For Manufacturing Magnetic Powder
AssigneeSeiko Epson Corporation
InventorToshiki SANO
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Abstract
A magnetic powder contains a soft magnetic material represented by the following composition formula, in which an average particle size is 2 μm or more and 10 μm or less, and at least a surface layer is nanocrystallized, FeaCubNbcSidBe where, a, b, c, d, and e each indicates an atomic percentage, 71.0 at %≤a≤76.0 at %, 0.5 at %≤b≤1.5 at %, 2.0 at %≤c≤4.0 at %, 11.0 at %≤d≤16.0 at %, and 8.0 at %≤e≤13.0 at %.
Claims7
A magnetic powder, comprising:
- a soft magnetic material represented by the following composition formula, wherein
- an average particle size is 2 μm or more and 10 μm or less, and
- at least a surface layer is nanocrystallized,
- FeaCubNbcSidBe
- where a, b, c, d, and e each indicates an atomic percentage, 71.0 at %≤a≤76.0 at %, 0.5 at %≤b≤1.5 at %, 2.0 at %≤c≤4.0 at %, 11.0 at %≤d≤16.0 at %, and 8.0 at %≤e≤13.0 at %.
2 more elements
A method for manufacturing a magnetic powder comprising:
- a powdering step of making a molten metal containing a soft magnetic material represented by the following composition formula into a raw material powder by a water atomizing method;
- a classification step of classifying the raw material powder into a powder having an average particle size of 2 μm or more and 10 μm or less;
- and
- a heat treatment step of heating the powder and nanocrystallizing at least a surface layer of the powder into a magnetic powder
- FeaCubNbcSidBe
- where, a, b, c, d, and e each indicates an atomic percentage, 71.0 at %≤a≤76.0 at %, 0.5 at %≤b≤1.5 at %, 2.0 at %≤c≤4.0 at %, 11.0 at %≤d≤16.0 at %, and 8.0 at %≤e≤13.0 at %.
3 more elements
Dependencies are inferred from the claim text.