Soft magnetic powder, magnetic core, method for manufacturing soft magnetic powder, and method for manufacturing magnetic core
AssigneesAutonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
InventorsShintaro Nanbara, Kazushi Kusawake, Takashi Takada
Life of this patent
Estimating the term…
Abstract
Provided is soft magnetic powder constituted by an Fe alloy containing Si, in which soft magnetic particles of the soft magnetic powder include a SiO2 layer formed on a surface of the particles, and a surface layer formed directly on the SiO2 layer. The surface layer includes a first material that constitutes a matrix and a second material that is dispersed in the matrix. The first material is silicone or phosphate, and the second material is silicone or phosphate and is different from the first material.
Claims12
A magnetic core constituted by a composite material containing soft magnetic powder and resin,
- wherein the soft magnetic powder is constituted by an Fe alloy containing Si, wherein soft magnetic particles of the soft magnetic powder include a SiO2 layer formed on a surface of the particles, and a surface layer formed directly on the SiO2 layer, the surface layer includes a first material that constitutes a matrix and a second material that is dispersed in the matrix, and the first material is silicone or phosphate, and the second material is silicone or phosphate and is different from the first material;
- wherein a volume percentage of the soft magnetic powder in the composite material is 50% or more and 85% or less, and
- Bs/μm is 0.056 or more, where Bs is a saturation flux density of the composite material and μm is a maximum magnetic permeability.
A magnetic core constituted by a composite material containing soft magnetic powder and resin,
- wherein the soft magnetic powder is constituted by an Fe alloy containing Si, wherein soft magnetic particles of the soft magnetic powder include a SiO2 layer formed on a surface of the particles, and a surface layer formed directly on the SiO2 layer, the surface layer includes a first material that constitutes a matrix and a second material that is dispersed in the matrix, and the first material is phosphate, and the second material is silicone,
- a volume percentage of the soft magnetic powder in the composite material is 50% or more and 85% or less, and Bs/μm is 0.056 or more, where Bs is a saturation flux density of the composite material and μm is a maximum magnetic permeability.
A magnetic core constituted by a composite material containing soft magnetic powder and resin,
- wherein the soft magnetic powder is constituted by an Fe alloy containing Si, wherein soft magnetic particles of the soft magnetic powder include a SiO2 layer formed on a surface of the particles, and a surface layer formed directly on the SiO2 layer, the surface layer includes a first material that constitutes a matrix and a second material that is dispersed in the matrix, and the first material is silicone or phosphate, and the second material is silicone or phosphate and is different from the first material, wherein an average thickness of the SiO2 layer is 5 nm or more and 200 nm or less;
- a volume percentage of the soft magnetic powder in the composite material is 50% or more and 85% or less, and
- Bs/μm is 0.056 or more, where Bs is a saturation flux density of the composite material and μm is a maximum magnetic permeability.
A magnetic core constituted by a composite material containing soft magnetic powder and resin, wherein the soft magnetic powder is constituted by an Fe alloy containing Si, wherein soft magnetic particles of the soft magnetic powder include a SiO2 layer formed on a surface of the particles, and a surface layer formed directly on the SiO2 layer, the surface layer includes a first material that constitutes a matrix and a second material that is dispersed in the matrix, and the first material is silicone or phosphate, and the second material is silicone or phosphate and is different from the first material, wherein an average thickness of the surface layer is 0.5 μm or more and 10 μm or less,
- a volume percentage of the soft magnetic powder in the composite material is 50% or more and 85% or less, and
- Bs/μm is 0.056 or more, where Bs is a saturation flux density of the composite material and μm is a maximum magnetic permeability.
A magnetic core constituted by a composite material containing soft magnetic powder and resin,
- wherein the soft magnetic powder is constituted by an Fe alloy containing Si, wherein soft magnetic particles of the soft magnetic powder include a SiO2 layer formed on a surface of the particles, and a surface layer formed directly on the SiO2 layer, the surface layer includes a first material that constitutes a matrix and a second material that is dispersed in the matrix, and the first material is silicone or phosphate, and the second material is silicone or phosphate and is different from the first material, wherein an average thickness of the surface layer is 0.5 μm or more and 10 μm or less, wherein the Si content in the Fe alloy is 4.5 mass % or more and 8.0 mass % or less,
- a volume percentage of the soft magnetic powder in the composite material is 50% or more and 85% or less, and
- Bs/μm is 0.056 or more, where Bs is a saturation flux density of the composite material and μm is a maximum magnetic permeability.
Dependencies are inferred from the claim text.