Abstract: An inductor includes a first wire and a second wire, a first magnetic layer containing magnetic particles having an approximately spherical shape, a second magnetic layer containing magnetic particles having an approximately flat shape, and a third magnetic layer containing magnetic particles having an approximately flat shape. The relative permeability of each of the second magnetic layer and the third magnetic layer is higher than the relative permeability of the first magnetic layer. A fourth surface of the first magnetic layer has a second concave portion. A sixth surface of the third magnetic layer has a fourth concave portion.

Abstract: An inductor includes a wire, and a magnetic layer covering the wire. The wire includes a conducting line, and an insulating layer covering the conducting line. The magnetic layer includes a magnetic particle and a binder. In a peripheral region of the wire, a filling rate of the magnetic particle is 40% by volume or more. The peripheral region is a region of the magnetic layer traveling outwardly from an outer peripheral surface of the wire by 1.5 times an average of the longest length and the shortest length from the center of gravity C of the wire to an outer surface of the wire in a cross-sectional view.

Abstract: An inductor includes a wire including a conducting line, and an insulating film disposed on an entire circumferential surface of the conducting line, and a magnetic layer embedding the wire. The magnetic layer contains a magnetic particle. The magnetic layer includes a first layer in contact with the circumferential surface of the wire, a second layer in contact with the surface of the first layer, . . . and the n-th layer (n is a positive number of 3 or more) in contact with the surface of the (n?1)th layer. In the two layers adjacent to each other in the magnetic layer, the relative magnetic permeability of the layer closer to the wire is lower than the relative magnetic permeability of the layer farther from the wire.

Abstract: In a coil-embedded dust core constituting an inductance element, a winding body of a coil disposed inside a coil-embedded dust core and a dust core have a relationship that the inner core volume ratio RV defined below is 3 or more and 5 or less: RV=(V1/V2)/(1?V/Vp), where V1 represents a volume of a region in the dust core located on an inner side of the winding body of the coil when the coil-embedded dust core is viewed in a first direction, which is a direction along a winding axis of the coil, V2 represents a volume of a region in the dust core located on an outer side of the winding body of the coil when the coil-embedded dust core is viewed in the first direction, V represents a volume of the dust core, and Vp represents a volume of the coil-embedded dust core.

Abstract: A repair apparatus for repairing damaged reinforcing bars in a structure includes a strip-shaped conductor including conductive wires arranged in a height direction, the conductive wires being arranged in parallel, a high-frequency current generation unit configured to supply a high-frequency current between the conductive wires of a first end side of the conductor and the conductive wires of a second end side of the conductor, and a connection body configured to connect the conductive wires to each other and connect the first end side and the second end side of the conductor so that the conductive wires form a coil, and the high-frequency current generation unit supplies a high-frequency current between a conductive wire at an upper end or a lower end of the first end side of the conductor and a conductive wire at a lower end or an upper end of the second end side of the conductor.

Abstract: A dust core includes a metal magnetic material and a resin. Fine particles exist on a surface of the dust core.

Abstract: A powder magnetic core includes a compact including soft magnetic powder, and an insulating-resin coating that covers a portion of a surface of the compact. A ratio of an area of the insulating-resin coating to a surface area of the compact is lower than or equal to 85%, and a maximum depth of unevenness on a surface of the insulating-resin coating is smaller than or equal to 20 ?m.

Abstract: In an exemplary embodiment, a coil component includes: a drum core 10 that includes a winding shaft 12 and flange parts 14a, 14b; a coil 40 that includes a winding part 42 and a pair of lead parts 44a, 44b led out from the winding part 42 toward a side face 22 of the flange part 14a and then bent onto the flange part 14a along the side face 22; and a pair of external electrodes 60a, 60b provided on the outer face 17a of the flange part 14a, and connected to the pair of lead parts 44a, 44b; wherein the shortest distance L4 between the side face 22 and the outermost periphery of the winding part 42 is shorter than the shortest distance L3 between a side face 24, opposite the side face 22, of the flange part 14a, and the outermost periphery of the winding part 42.

Abstract: Provided are a power supply member in a wireless power supply system, and applications of the power supply member. The power supply member includes: a first magnetic sheet that includes a first metal magnetic powder and a first resin, the first metal magnetic powder having a ratio of a length of a long side to a length of a short side is more than 1.0; a coil that is wound around and arranged on one surface of the first magnetic sheet; and a second magnetic sheet that is arranged on the same surface of the first magnetic sheet as the surface where the coil is arranged, is arranged on at least one of a side inside of an inner peripheral end of the coil or a side outside of an outer peripheral end of the coil, and includes a second metal magnetic powder and a second resin.

Abstract: A laminated sheet includes a sheet-shaped inductor including a plurality of wirings and a magnetic layer embedding the plurality of wirings, and a processing stability layer disposed on at least one surface 6 in a thickness direction of the inductor. The magnetic layer includes a binder and a magnetic particle having a generally flat shape and whose material is a metal. The processing stability layer includes a cured product of a thermosetting resin composition. The thermosetting resin composition includes a thermosetting resin as an essential component. The thermosetting resin composition includes at least one kind of particle, as an optical component, selected from the group consisting of a first particle having a generally spherical shape and a second particle having a generally flat shape and whose material is an inorganic compound.

Abstract: A coil component includes: a magnetic body part and a cover part covering one side of a magnetic layer part; and a coil part embedded in the magnetic body part. The magnetic body part is comprised of the following two types of layers: (A) an oblate soft magnetic grain-containing layer, and (B) a spherical grain-containing layer, wherein layer (A) extends over the entire range of the magnetic body part except for a portion including the coil part in a direction perpendicular to an axis direction of the coil part, layer (B) adjoins layer (A) in the axis direction. The cover part is constituted by multiple layers including one or more of layer(s) (A) and one or more of layer(s) (B) and extending over the entire range of the magnetic body part in the direction perpendicular to the axis direction.

Abstract: A coil component includes a body comprising a support member and a coil portion embedded in one surface of the support member; and external electrodes connected to the coil portion, wherein the body comprises a plurality of metal particles, at least some of the plurality of metal particles comprises a plastically deformable first particle, and at least some of the first particles have a deformed surface and thus have a shape corresponding to a surface of a neighboring magnetic metal particle.

Abstract: An electronic device includes a magnetic element, and a first circuit module. The magnetic element includes a magnetic core set and a winding assembled in the magnetic core set. The first circuit module is coupled to the first winding of the magnetic element. A vertical projection area of the first circuit module has an overlap portion with a vertical projection area of the winding of the magnetic core set on a first plane, and the first plane is a horizontal plane at which the winding is located.

Abstract: An inductor component comprising a magnetic layer containing a magnetic powder and a resin containing the magnetic powder, a first spiral wiring and a second spiral wiring disposed on the same plane in the magnetic layer and adjacent to each other, and an insulating layer disposed between the first spiral wiring and the second spiral wiring and containing no magnetic substance. The first spiral wiring includes a first side surface facing the second spiral wiring, and at least a portion of the first side surface is in contact with the magnetic layer.

Abstract: A core main body includes: an outer peripheral iron core, and at least three iron cores coupled to an inner surface of the outer peripheral iron core, in which a gap is formed between adjacent iron cores among the at least three iron cores, the gap being magnetically connectable, and a plurality of notches are formed on an outer circumferential surface of the outer peripheral iron core, the plurality of notches extending in an axial direction of the outer peripheral iron core. The reactor includes such a core body.

Abstract: A dust core includes large particles having an average particle size of 8-15 ?m, medium particles having an average particle size of 1-5 ?m, and small particles having an average particle size of 300-900 nm when a cross section thereof is observed. An area ratio occupied by the large particles is 50% to 90%, an area ratio occupied by the medium particles is 0% to 30%, and an area ratio occupied by the small particles is 5% to 30%, when a total area ratio occupied by the large particles, the medium particles and the small particles is 100% in the cross section. Vickers hardness (Hv) of the large particles, the medium particles and the small particles is 150-600 respectively. The small particles are alloy powder containing Fe and at least Si or N. The dust core may be included in an inductor element.

Abstract: One object is to suppress thermal shrinkage of a cover resin layer at the time of thermal curing. A laminated coil according to one embodiment of the present invention is provided with a magnetic substrate formed of a sintered magnetic material, an insulation resin layer formed on the magnetic substrate, a cover resin layer formed on the insulation resin layer, and a coil conductor embedded in the insulation resin layer. In one embodiment of the present invention, said insulation resin layer includes a first resin and first filler particles, and said cover resin layer includes a second resin and second filler particles. A filling factor of the second filler particles in the cover resin layer is higher than a filling factor of the first filler particles in the insulation resin layer.

Abstract: A multilayer capacitor and a method of manufacturing includes a conductive resin layer of an external electrode disposed on a first electrode layer. The conductive resin layer includes a conductive connecting part and an intermetallic compound contacting the first electrode layer and the conductive connecting part. The conductive connecting part contacts a plurality of metal particles and a second electrode layer, such that the 7 equivalent series resistance (ESR) of the multilayer capacitor is decreased and warpage strength of the multilayer capacitor is improved.

Abstract: A soft magnetic alloy including a compositional formula of ((Fe(1?(?+?))X1?X2?)(1?(a+b+c+e))MaBbPcCue)1?fCf, wherein X1 is one or more selected from the group consisting Co and Ni, X2 is one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements, “M” is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W, and V, 0.030<a?0.14, 0.028?b?0.20, 0?c?0.030, 0<e?0.030, 0<f?0.040, ??0, ??0, and 0??+??0.50 are satisfied.

Abstract: A coil component including an element assembly and a coil conductor embedded in the element assembly. The element assembly includes a first magnetic layer and a second magnetic layer that constitute a first principal surface and a second principal surface, respectively, where the first principal surface and the second principal surface are opposite to each other in the element assembly. The first magnetic layer has a higher relative magnetic permeability than the second magnetic layer. At least part of a winding portion of the coil conductor is located in the first magnetic layer. The first magnetic layer contains metal magnetic particles and a resin, and the second magnetic layer contains metal magnetic particles, a resin, and zinc oxide particles. The metal magnetic particles and the zinc oxide particles are dispersed in the resin.

Abstract: There is provided a magnetic powder for high frequency use including, in percent by mass, 0.2 to 5.0% C and at least one selected from Group IV to VI elements, Mn, and Ni in a total of 0.1 to 30%, the balance being Fe or/and Co, inclusive 0% for Co), and incidental impurities, wherein the saturation magnetization exceeds 1.0 T and satisfies Expression (1): Co%/(Co%+Fe%)?0.50. According to the magnetic powder, there is provided a metal magnetic powder having a saturation magnetization exceeding 1.0 T and also having a high FR of 200 MHz or more and a magnetic resin composition including the metal magnetic powder.

Abstract: Provided herein is a soft magnetic alloy powder that can exhibit a high saturation flux density and desirable soft magnetic characteristics. A dust core using the soft magnetic alloy powder is also provided. The soft magnetic alloy powder is an Fe-based nanocrystalline soft magnetic alloy powder of a crystallized Fe-based amorphous soft magnetic alloy powder, and has a DSC curve with a first peak that is 15% or less of a first peak of the Fe-based amorphous soft magnetic alloy in terms of a maximum value.

Abstract: A method is provided for the production of a wound nanocrystalline magnetic core in which a nanocrystalline metal strip made of (Fe1-aMa)100-x-y-z-?-?CuxSiyBzM??X? is pre-wound to form a first coil. An insulating foil is provided that is coated with an adhesive on at least one side. An adhesive is applied to the nanocrystalline metal strip to laminate the insulating foil onto the metal strip and thereby to stabilise the metal strip as it is wound off the coil. The laminated nanocrystalline metal strip and the insulating foil are bifilar wound to form a bifilar, layer-insulated coil.

Abstract: A soft magnetic alloy powder includes a plurality of soft magnetic alloy particles of a soft magnetic alloy represented by a composition formula (Fe(1?(?+?))X1?X2?)(1?(a+b+c+d+e))MaBbPcSidCe, wherein X1 represents Co and/or Ni; X2 represents at least one selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements; M represents at least one selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W, and V; 0.020?a?0.14, 0.020<b?0.20, 0<c?0.15, 0?d?0.060, 0?e?0.040, ??0, ??0, and 0??+??0.50 are satisfied, and wherein the soft magnetic alloy has a nano-heterostructure with initial fine crystals present in an amorphous substance; and the surface of each of the soft magnetic alloy particles is covered with a coating portion including a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.

Abstract: A magnetic iron alloy and process of making the same. The alloy includes iron, approximately 2 wt. % to approximately 8 wt. % cobalt, approximately 0.05 wt. % to approximately 5 wt. % manganese, and approximately 0.05 wt. % to approximately 5 wt. % silicon. The alloy may also include up to approximately 0.3 wt. % chromium, up to approximately 2 wt. % vanadium, up to approximately 1 wt. % nickel, up to approximately 0.05 wt. % niobium, and up to approximately 0.02 wt. % carbon.

Abstract: A coil electrode component includes a body including magnetic metal material, a coil disposed in the body and having first and second lead parts respectively outwardly exposed through first and second surfaces of the body. A first plating electrode is formed on the first surface of the body and a further surface of the body connected to and extended from the first surface of the body, and connected to the first lead part. A second plating electrode is formed on the second surface of the body and a further surface of the body connected to and extended from the second surface of the body, and connected to the second lead part.

Abstract: A coil component includes a magnetic portion that includes metal particles and a resin material, a coil conductor embedded in the magnetic portion, and outer electrodes electrically connected to the coil conductor. The average particle diameter of the metal particles in the magnetic portion is 1 ?m or more and 5 ?m or less, and the CV value of the metal particles is 50% or more and 90% or less.

Abstract: An apparatus for simultaneously heating a plurality of food products, comprising: a containment structure forming a housing chamber; one or more separating elements mounted in the housing chamber to delimit a plurality of separate housing compartments for receiving the food products; radio frequency dielectric heating means with an operating frequency of between 1 MHz and 300 MHz, mounted in the containment structure and comprising at least one first electrode and one second electrode; wherein the housing compartments are aligned along a row, the first electrode and the second electrode delimiting on two opposite sides the row; and wherein inside the housing chamber, between the first electrode and the second electrode, there is also at least one inductor.

Abstract: A magnetic material has: multiple soft magnetic alloy grains that contain Fe, element L (where element L is Si, Zr, or Ti), and element M (where element M is not Si, Zr, or Ti, and oxidizes more easily than Fe); a first oxide film that contains element L and covers each of the multiple soft magnetic alloy grains; a second oxide film that contains element M and covers the first oxide film; a third oxide film that contains element L and covers the second oxide film; a fourth oxide film that contains Fe and covers the third oxide film; and bonds that are constituted by parts of the fourth oxide film and that bond the multiple soft magnetic alloy grains together.

Abstract: Embodiments are directed to a method of forming a laminated magnetic inductor and resulting structures having multiple magnetic layer thicknesses. A first magnetic stack having one or more magnetic layers alternating with one or more insulating layers is formed in a first inner region of the laminated magnetic inductor. A second magnetic stack is formed opposite a major surface of the first magnetic stack in an outer region of the laminated magnetic inductor. A third magnetic stack is formed opposite a major surface of the second magnetic stack in a second inner region of the laminated magnetic inductor. The magnetic layers are formed such that a thickness of a magnetic layer in each of the first and third magnetic stacks is less than a thickness of a magnetic layer in the second magnetic stack.

Abstract: In accordance with an exemplary embodiment, a power inductor includes a body, a base disposed in the body, and a coil pattern disposed on at least one surface of the base, in which the body includes metal powder, a polymer, and a thermal conductive filler and the base is formed by bonding a copper foil to both surfaces of a metal plate comprising iron.

Abstract: In some embodiments, a magnetic body 1 has soft magnetic alloy grains 11 that contain Fe, M (M is a metal element that oxidizes more easily than Fe), and S, as well as oxide films 12 produced by partial oxidization of the soft magnetic alloy grains 11, wherein the magnetic body 1 has its adjacent soft magnetic alloy grains 11 bonded together at least partially through the oxide films 12, and contains Fe by 92.5 to 96 percent by weight and S by 0.003 to 0.02 percent by weight. The magnetic body can have high levels of both magnetic permeability and volume resistivity, to meet the demand for smaller, higher-performance electronic components.

Abstract: A coil component includes a magnetic portion that includes metal particles and a resin material, a coil conductor embedded in the magnetic portion, and outer electrodes electrically connected to the coil conductor. The average particle diameter of the metal particles in the magnetic portion is 1 ?m or more and 5 ?m or less, and the CV value of the metal particles is 50% or more and 90% or less.

Abstract: Provided are: a metal powder core having a configuration suitable for core loss reduction and strength improvement; a coil component employing this; and a fabrication method for metal powder core. The metal powder core is obtained by dispersing Cu powder among soft magnetic material powder comprising pulverized powder of Fe-based soft magnetic alloy and atomized powder of Fe-based soft magnetic alloy and then by performing compaction. The fabrication method for metal powder core includes: a mixing step of mixing together soft magnetic material powder containing thin-leaf shaped pulverized powder of Fe-based soft magnetic alloy and atomized powder of Fe-based soft magnetic alloy, Cu powder, and a binder and thereby obtaining a mixture; a forming step of performing pressure forming on the mixture obtained at the mixing step; and a heat treatment step of annealing a formed article obtained at the forming step.

Abstract: The present disclosure provides a wrapping method for the common inductor. The common mode inductor includes a first coil winding and a second coil winding. The wrapping method for a common mode inductor includes steps of: disposing two isolation blocking sheets at different positions of a magnetic core; wrapping the first coil winding around the magnetic core, wherein the first coil winding is divided into two wrapping areas by one of the isolation blocking sheets; wrapping the second coil winding around the magnetic core, wherein the second coil winding is divided into two wrapping areas by the other one of the isolation blocking sheets, wherein the first coil winding and the second coil winding are symmetrically wrapped.

Abstract: An electronic component includes a composite body made of a composite material of a resin material and a metal powder; and a metal film disposed on an outer surface of the composite body. The metal film is in contact with the resin material and the metal powder of the composite body, and an average particle diameter of crystals of the metal film contacting the resin material is 60% or more and 120% or less of an average particle diameter of crystals of the metal film contacting the metal powder.

Abstract: A case for a powered toothbrush comprises a housing having an interior for receiving a powered toothbrush, and a cover, wherein the cover substantially obfuscates the interior but is sufficiently light-transmissive to communicate the presence of an indicator from within the interior. Also provided is a powered toothbrush and case system.

Abstract: An electronic component includes a magnetic body having internal coil patterns. The magnetic body includes a core part including the internal coil patterns; and upper and lower cover parts disposed above and below the core part, respectively. Magnetic wires are disposed in the core part, and magnetic plates are disposed in the upper and lower cover parts.

Abstract: A power supply module and its manufacturing method are disclosed. The manufacturing method for the power supply module includes: configuring a coil such that coil terminals are configured by way of electrical connection in the preset circuit connection configuration of the connector; preparing a mold cavity, and placing the connector housed with the coil and the electronic components into the mold cavity; making a magnetic mixture, and filling the mold cavity where the connector is placed with the magnetic mixture to form a magnetic body under pressure, wherein the magnetic body encapsulates at least the coil, the electronic components and a portion of the connector adapted to house the coil and the electronic components, and the terminal is exposed outside the magnetic body; demolding the magnetic body from the mold cavity; and increasing the temperature of the demolded magnetic body by heating.

Abstract: A coil electronic component includes a body having a coil part disposed therein and external electrodes connected to the coil part. The body includes a plurality of magnetic particles. In one example, a particle size distribution D50 of the magnetic particles in the body is 1 ?m or less. In other examples, a particle size distribution D99 of the magnetic particles in the body is 1 ?m or less; a particle size distribution ratio D99/D50 of the magnetic particles in the body is 1.5 or less; and/or a variation coefficient of the particle size of the magnetic particles in the body is 20% or less.

Abstract: Soft magnetic core, in which permeabilities that occur at least two different locations of the core are different.

Abstract: A compact random media size antenna employing random magnetic and dielectrics nm to mm range size particles in polymer hosts is used to transfer E & M oscillations in 1 kHz to 900 Mhz range using a 1 cm to 1 meter length antenna. This is achieved by using small size particles and a random mean path length of E & M wavefront travel in and about a core tube of effective length matching Leff=L2/2ltr, equivalent to ?/2 for transmitting and receiving E & M radiation, where L is the physical size of the antenna, ltris the transport scattering random walk length between particles and ? is the frequency wavelength.

Abstract: A cooling device for a transformer, capable of reducing heat generation from windings and a core, is provided. The cooling device for the transformer includes a primary winding and a second winding wound around a center part of the core and separated from each other. A heat-dissipating panel for releasing heat generated from the core, the primary winding, and the secondary winding to the exterior using heat conductance is inserted between the primary winding and the secondary winding. In addition, the heat-dissipating panel is configured to release heat using exposed edges of the primary winding and the secondary winding.

Abstract: A mobile terminal power receiving module 1 which is housed together with a rechargeable battery 3 in a rechargeable battery pack 2 in a mobile terminal such as a smart phone 5, includes a sheet coil 13 in which a coil 12 constituted by conductors is formed on a flexible circuit board 11 as a circuit pattern and a magnetic sheet 14 made of resin in which magnetic powder is dispersed.

Abstract: A reactor includes a coil formed by connecting a pair of coil elements configured by a wound wire, and magnetic core. The reactor for an on-vehicle converter converts an input voltage. Electricity applying conditions include a maximum DC current of 100 A or higher and 1000 A or lower, an average voltage of 100 V or higher and 1000 V or smaller, and a usable frequency of 5 kHz or higher and 100 kHz or smaller. The magnetic core is obtained by combining a plurality of divided core pieces without a gap provided. All the divided core pieces are made of hardened compact obtained by hardening resin of composite material containing magnetic powder and the resin. A distance between an inner peripheral surface of the coil element and an outer peripheral surface of the magnetic core opposite to the inner peripheral surface is 0.1 mm or more and 2 mm or less.

Abstract: An object is to provide a magnetic material and coil component offering improved magnetic permeability and insulation resistance, while also offering improved high-temperature load, moisture resistance, water absorbency, and other reliability characteristics at the same time. A magnetic material that has multiple metal grains constituted by Fe—Si-M soft magnetic alloy (where M is a metal element that oxidizes more easily than Fe), as well as oxide film constituted by an oxide of the soft magnetic alloy and formed on the surface of the metal grains, wherein the magnetic material has bonding parts where adjacent metal grains are bonded together via the oxide film formed on their surface, as well as bonding parts where metal grains are directly bonded together in areas having no oxide film, and resin material is filled in at least some of the voids generating as a result of accumulation of the metal grains.

Abstract: A laminated inductor having an internal conductor forming region, as well as a top cover region and bottom cover region formed in a manner sandwiching the internal conductor forming region between top and bottom; wherein the internal conductor forming region has a magnetic part formed with soft magnetic alloy grains, as well as helical internal conductor embedded in the magnetic part; and at least one of the top cover region and bottom cover region (or preferably both) is/are formed with soft magnetic alloy grains whose average grain size is greater than that of grains in the internal conductor forming region including the soft magnetic alloy grains constituting the magnetic part.

Abstract: A filter body of a common mode noise filter includes: a non-magnetic body; a first magnetic body and a second magnetic body sandwiching the non-magnetic body; and a first coil conductor and a second coil conductor of planar shape which are embedded in the non-magnetic body and positioned on the first magnetic body side and second magnetic body side in the non-magnetic body in a manner facing each other in a non-contact state; and also has a non-magnetic first protective part and second protective part which are made of a non-magnetic material whose strength is higher than the first magnetic body and second magnetic body and which are positioned on the outermost side of the filter body in a manner sandwiching the first magnetic body and second magnetic body.

Abstract: A rod-shaped magnetic core element, having a first end with a spherical or cylindrical recess or a spherical or cylindrical connecting protrusion, and a second end with a spherical or cylindrical recess or a spherical or cylindrical connecting protrusion so that a bent connection of at least two magnetic core elements is variably adjustable. Magnetic core elements comprising spherical or cylindrical magnetic core ends of this type allow a nearly gap-free construction with little magnetic leakage due to slightly larger end surfaces in comparison with ferrite rods having beveled plane end section surfaces. The enlarged end surface of the spherical surface advantageously allows a more stable connection of individual magnetic core elements without adhesive bonding. This allows the construction of flexible, multiple-member and inexpensive rod core coils and antennae.

Abstract: It is an objective of the invention to provide a dust core made of an Fe-based amorphous metal powder having excellent magnetic properties, in which the dust core has a higher-than-conventional density, excellent magnetic properties and a high mechanical strength. There is provided a dust core including a mixture powder compacted, the mixture powder including: an Fe-based amorphous metal powder having a crystallization temperature Tx (unit: K), the Fe-based amorphous metal powder being plastically deformed, the plastically deformed metal Fe-based amorphous metal powder having a filling factor in the dust core higher than 80% and not higher than 99%; and a resin binder having a melting point Tm (unit: K), in which the Tx and Tm satisfy a relationship of “Tm/Tx?0.70”.