Abstract: Provided are a ferrite material, a composite magnetic body, a coil component, and a power supply device, having high magnetic permeability. Ferrite is ferromagnetic and is expressed by a chemical formula MnxSiyFezO4-?, where 0<x<1, y>0, z>0, x+y+z=3, and ??0.5.

Abstract: A production method for a magnetic material, which is expressed by a chemical structure formula Fe(Al1-xMnx)2O4, where 0<x<1, and exhibits ferromagnetism, includes: preparing a mixed aqueous solution by dissolving, in distilled water, Fe nitrate, Al nitrate, and an oxide including Mn, the Fe nitrate, the Al nitrate, and the oxide being parent materials; preparing a metal-citric acid complex by mixing citric acid and ethylene glycol with the mixed aqueous solution; obtaining a precursor by boiling the metal-citric acid complex to a gel and drying the gel; and obtaining the magnetic material by sintering the precursor.

Abstract: A reactor includes a coil body, an exterior case, and a filler. The coil body includes a core and a coil wound around the core. The exterior case includes a metal structure and a resin frame. The metal structure has a bottom surface and a side wall provided to stand upright from the bottom surface. The bottom surface and the side wall of the metal structure are unitarily formed with each other. The frame is disposed at an opposite side to the bottom surface of the metal structure. The exterior case houses the core and the coil. The filler is filled between the exterior case and the coil body.

Abstract: Provided are a ferrite material, a composite magnetic body, a coil component, and a power supply device, having high magnetic permeability. Ferrite is ferromagnetic and is expressed by a chemical formula MnxSiyFezO4-?, where 0<x<1, y>0, z>0, x+y+z=3, and ??0.5.

Abstract: A coil part includes two coils, two first molded bodies, and a second molded body. The two first molded bodies serving as electrical insulation individually cover the two coils. The second molded body serving as electrical insulation integrally covers the two first molded bodies. The second molded body has a modulus of elasticity lower than a modulus of elasticity of each of the two first molded bodies.

Abstract: A composite magnetic material includes a plurality of soft-magnetic metal powders, a first oxide that covers a surface of each of the plurality of soft-magnetic metal powders, and a second oxide that covers a surface of the first oxide and is interposed among the plurality of soft-magnetic metal powders each coated with the first oxide. The first oxide has a first recess in a surface, and the second oxide is provided in the first recess. With this configuration, peeling between the first oxide and the second oxide can be prevented, so that the composite magnetic material having high mechanical strength can be provided.

Abstract: A composite magnetic material includes first particles made of soft magnetic metal and second particles provided between first particles. Each of the second particles includes a first solid phase and a second solid phase. The composite magnetic material exhibits high magnetic characteristics.

Abstract: A reactor includes a coil body, an exterior case, and a filler. The coil body includes a core and a coil wound around the core. The exterior case includes a metal structure and a resin frame. The metal structure has a bottom surface and a side wall provided to stand upright from the bottom surface. The bottom surface and the side wall of the metal structure are unitarily formed with each other. The frame is disposed at an opposite side to the bottom surface of the metal structure. The exterior case houses the core and the coil. The filler is filled between the exterior case and the coil body.

Abstract: A production method for a magnetic material, which is expressed by a chemical structure formula Fe(Al1?xMnx)2O4, where 0<x<1, and exhibits ferromagnetism, includes: preparing a mixed aqueous solution by dissolving, in distilled water, Fe nitrate, Al nitrate, and an oxide including Mn, the Fe nitrate, the Al nitrate, and the oxide being parent materials; preparing a metal-citric acid complex by mixing citric acid and ethylene glycol with the mixed aqueous solution; obtaining a precursor by boiling the metal-citric acid complex to a gel and drying the gel; and obtaining the magnetic material by sintering the precursor.

Abstract: A composite magnetic material includes first particles made of soft magnetic metal and second particles provided between first particles. Each of the second particles includes a first solid phase and a second solid phase. The composite magnetic material exhibits high magnetic characteristics.

Abstract: A coil component has a wound coil, a coil magnetic body, and an exterior body. The coil magnetic body has a magnetic core inside winding of the wound coil. The exterior body covers a surface of the coil magnetic body. This coil component has a mount surface, and a thermal conductivity in a direction parallel to a surface of the exterior body is greater than a thermal conductivity in a direction perpendicular to the surface of the exterior body.

Abstract: A coil component includes a magnetic core, a coil-wire portion wound on the magnetic core, and a case made of a resin covering the magnetic core and the coil-wire portion. The magnetic core is made of a pressed magnetic material powder and forms a closed magnetic circuit. The magnetic core has a lower surface configured to contact a mounting surface. The case has a lower surface configured to contact the mounting surface. The lower surface of the magnetic core includes an exposed-core portion exposed from the case. The exposed-core portion is flush with the lower surface of the case. This coil component enhances the efficiency of heat dissipation.

Abstract: A composite magnetic material includes a plurality of soft-magnetic metal powders, a first oxide that covers a surface of each of the plurality of soft-magnetic metal powders, and a second oxide that covers a surface of the first oxide and is interposed among the plurality of soft-magnetic metal powders each coated with the first oxide. The first oxide has a first recess in a surface, and the second oxide is provided in the first recess. With this configuration, peeling between the first oxide and the second oxide can be prevented, so that the composite magnetic material having high mechanical strength can be provided.

Abstract: A composite magnetic material manufactured by mixing a metal magnetic powder with an insulating binder to produce a mixed powder, press-molding the mixed powder to produce a molded product, and heat-treating the molded product in an oxidizing atmosphere at not lower than 80° C. and not higher than 400° C. to form an oxide film on a surface of the molded product. The metal magnetic powder includes Si, Fe, and component A, and the composition thereof satisfies 5.5%?Si?9.5%, 10%?Si+component A?13.5%, and the remainder is Fe, where % denotes weight %. The component A includes at least one of Ni, Al, Ti, and Mg.

Abstract: A coil component has a wound coil, a coil magnetic body, and an exterior body. The coil magnetic body has a magnetic core inside winding of the wound coil. The exterior body covers a surface of the coil magnetic body. This coil component has a mount surface, and a thermal conductivity in a direction parallel to a surface of the exterior body is greater than a thermal conductivity in a direction perpendicular to the surface of the exterior body.

Abstract: A composite magnetic material includes metal magnetic powder and thermosetting resin. The metal magnetic powder includes first metal magnetic powder and second metal magnetic powder. The first metal magnetic powder includes iron and a first element with oxygen affinity higher than that of iron. The second metal magnetic powder includes at least iron. The second metal magnetic powder also includes the first element for an amount smaller than the first element contained in the first metal magnetic powder, or not include the first element. A mean particle diameter of the first metal magnetic powder is greater than a mean particle diameter of the second metal magnetic powder. The second metal magnetic powder is 10 weight % to 30 weight % of the total amount of the metal magnetic powder. This composite magnetic material can secure high magnetic permeability and also improve withstand voltage.

Abstract: A coil component includes a magnetic core, a coil-wire portion wound on the magnetic core, and a case made of a resin covering the magnetic core and the coil-wire portion. The magnetic core is made of a pressed magnetic material powder and forms a closed magnetic circuit. The magnetic core has a lower surface configured to contact a mounting surface. The case has a lower surface configured to contact the mounting surface. The lower surface of the magnetic core includes an exposed-core portion exposed from the case. The exposed-core portion is flush with the lower surface of the case. This coil component enhances the efficiency of heat dissipation.

Abstract: A composite magnetic material manufactured by mixing a metal magnetic powder with an insulating binder to produce a mixed powder, press-molding the mixed powder to produce a molded product, and heat-treating the molded product in an oxidizing atmosphere at not lower than 80° C. and not higher than 400° C. to form an oxide film on a surface of the molded product. The metal magnetic powder includes Si, Fe, and component A, and the composition thereof satisfies 5.5%?Si?9.5%, 10%?Si+component A?13.5%, and the remainder is Fe, where % denotes weight %. The component A includes at least one of Ni, Al, Ti, and Mg.

Abstract: The present invention provides a chip part manufacturing method comprising a separating process capable of suppressing deformation of chip parts, and also provides chip parts. It comprises a step of forming a plurality of frame-like void portions (32) in one main surface of substrate (30) and insulating resin layer (20) having a spiral void portion (40) disposed in the region thereof, a step of forming metal layer (36) in frame-like void portion (32) and spiral void portion (40) and on insulating resin layer (20), a step of polishing metal layer (36) at least up to the upper surface of insulating resin layer and forming coil section (18) in spiral void portion (40), and a step of forming a metal layer for connecting chip parts to frame-like void portion (32), wherein the metal layer is melted and removed by using an etching agent to separate a plurality of chip parts connected to each other by a frame-like connection.

Abstract: The invention can provide a dust core that can counteract a large electric current, achieve an increase in frequency and miniaturization, and achieve an improvement in voltage resistance, and a magnetic element using the same. The dust core of the invention is a dust core including metallic magnetic powder, an inorganic insulating material, and a thermosetting resin, in which the metallic magnetic powder has a Vickers hardness (Hv) in a range of 230?Hv?1000, the inorganic insulating material has a compressive strength of 10000 kg/cm2 or lower and is in a mechanical collapse state, and the inorganic insulating material in a mechanical collapse state and the thermosetting resin are interposed between the metallic magnetic powder particles.