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US 12,695,013 B2Granted
Soft magnetic powder containing oxide insulation film, manufacturing method thereof, and powder core produced therefrom
AssigneeKorea Institute of Science and Technology
InventorsJi Young Byun, Kwang-Deok Choi, Soyeon Lee
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Abstract
The present exemplary embodiments may provide soft magnetic powder including metal powder and an oxide insulation film coating a surface of metal powder particles, in which the metal powder particles may include one or more selected from pure iron or an iron-based alloy and the oxide insulation film may include an oxide of a component constituting the metal powder particles.
Claims13
Soft magnetic powder, comprising:
- metal powder;
- an oxide insulation film coating a surface of metal powder particles;
- and
- a polymer coating layer positioned on an outer surface of the oxide insulation film,
- wherein the metal powder particles include one or more selected from pure iron or an iron-based alloy, and
- the oxide insulation film includes an oxide of a component constituting the metal powder particles,
- wherein a thickness of the polymer coating layer is in a range of 10 nm to 300 nm.
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A method of manufacturing soft magnetic powder, comprising:
- preparing a powder mixture sample by mixing a metal powder containing at least one selected from pure iron or an iron-based alloy with an anti-sintering agent;
- and
- forming an oxide insulation film on the metal powder particles,
- wherein the forming of the oxide insulation film includes heating the powder mixture and oxidizing the soft magnetic metal powder with a certain amount of oxygen in a sealed container at a predetermined temperature,
- wherein the forming of the oxide insulation film is performed while stirring the powder mixture sample.
2 more elements
Dependencies are inferred from the claim text.