Abstract: The present invention relates to a magnetic core using a different type of magnetic material. The magnetic core according to one embodiment may comprise: a ferrite powder comprising manganese (Mn), zinc, iron, and oxygen (O); and a metal alloy powder made of at least two substances from among nickel (Ni), iron (Fe), aluminum (Al), molybdenum (Mo), and silicon (Si). Here, the magnetic core can comprise 67 to 72 wt % of the ferrite powder and 28 to 33 wt % of the metal alloy powder.

Abstract: The present invention relates to a method for preparing graphene using a novel block copolymer. The present invention has features that, by using the block copolymer to mediate graphene that is hydrophobic and a solvent of a feed solution that is hydrophilic, the exfoliation efficiency of graphene as well as the dispersion stability thereof can be increased during high-pressure homogenization.

Abstract: The present invention relates to a carbon nanotube fiber and methods for preparing the same. In one embodiment, a method for preparing a carbon nanotube fiber comprises reacting a carbon source in the presence of a catalyst and a catalytic activator to form carbon nanotube aggregates, contacting the carbon nanotube aggregates with graphene oxide, and forming the carbon nanotube aggregates in contact with the graphene oxide into a carbon nanotube fiber.

Abstract: The present invention provides graphene in which a polymer having a functional group capable of improving the dispersibility of graphene is bonded to the surface of the graphene. The present invention also provides a method for preparing the graphene described above.

Abstract: The present invention relates to a method for preparing a functionalized graphene. The method for preparing a functionalized graphene according to the present invention can functionalize graphene by a simple method and does not use any other substance other than graphene and a salt containing a double bond, thereby enabling functionalization of graphene while exhibiting characteristics inherent to graphene.

Abstract: The present invention relates to a method for preparing graphene using a novel block copolymer. The present invention has features that, by using the block copolymer to mediate graphene that is hydrophobic and a solvent of a feed solution that is hydrophilic, the exfoliation efficiency of graphene as well as the dispersion stability thereof can be increased during high-pressure homogenization.

Abstract: The present invention relates to a method for preparing graphene using a novel block copolymer. The present invention has features that, by using the block copolymer to mediate graphene that is hydrophobic and a solvent of a feed solution that is hydrophilic, the exfoliation efficiency of graphene as well as the dispersion stability thereof can be increased during high-pressure homogenization.

Abstract: The present invention provides graphene in which a polymer having a functional group capable of improving the dispersibility of graphene is bonded to the surface of the graphene. The present invention also provides a method for preparing the graphene described above.

Abstract: An inductor according to one embodiment of the present invention comprised: a magnetic core; and a coil wound around the magnetic core, wherein the magnetic core includes a plurality of stacked sub-magnetic cores, each sub-magnetic core includes a first magnetic body and a second magnetic body, the first magnetic body and the second magnetic core are different materials, the second magnetic body is arranged on a surface of the first magnetic body, each sub-magnetic core has a toroidal shape, and a permeability of the first magnetic body differs from a permeability of the second magnetic body.

Abstract: An inductor includes a first magnetic body having a toroidal shape and having a ferrite; and a second magnetic body configured to be different from the first magnetic body and including a metal ribbon, wherein the second magnetic body includes an outer magnetic body disposed on an outer circumferential surface of the first magnetic body and an inner magnetic body disposed on an inner circumferential surface of the first magnetic body, and each of the outer magnetic body and inner magnetic body is wound in a plurality of layers in a circumferential direction of the first magnetic body.

Abstract: The present invention relates to a method for preparing graphene which comprises subjecting expanded graphite to high speed homogenization to prepare a feed solution and then subjecting the same to high pressure homogenization, thereby increasing the degree of dispersion of expanded graphite in the feed solution and so improving the efficiency of high pressure homogenization. Therefore, the present method has features that the efficiency of graphene preparation is excellent and the size of graphene to be prepared is uniform, compared with a conventional process.

Abstract: The present invention relates to a method for preparing carbon nanotubes which are capable of more effectively preparing carbon nanotubes having a uniform and fine size, and a dispersion composition of carbon nanotubes obtained using the same. The method for preparing carbon nanotube comprises the steps of: forming a dispersion comprising carbon nanotube bundles, a dispersant and a solvent; and enabling the dispersion to consecutively pass through a high pressure homogenizer, wherein the dispersant is a mixture of plural kinds of polyaromatic hydrocarbon oxides, and the carbon nanotube bundles are pulverized or disentangled while passing through a microchannel of the high pressure homogenizer under a shear force to form carbon nanotubes.

Abstract: The present invention relates to a carbon nanotube fiber and methods for preparing the same. In one embodiment, a method for preparing a carbon nanotube fiber comprises reacting a carbon source in the presence of a catalyst and a catalytic activator to form carbon nanotube aggregates, contacting the carbon nanotube aggregates with graphene oxide, and forming the carbon nanotube aggregates in contact with the graphene oxide into a carbon nanotube fiber.

Abstract: The present invention relates to a method for preparing a functionalized graphene. The method for preparing a functionalized graphene according to the present invention can functionalize graphene by a simple method and does not use any other substance other than graphene and a salt containing a double bond, thereby enabling functionalization of graphene while exhibiting characteristics inherent to graphene.

Abstract: Embodiments relate to a light emitting device package having an improved luminous flux, and the light emitting device package includes a body including a cavity, a first lead frame and a second lead frame exposed on a bottom surface of the cavity and separate from each other by an electrode separating member, a first light emitting device disposed on the first lead frame, a second light emitting device disposed on the second lead frame, and a Zener diode disposed on the first lead frame or the second lead frame, and disposed more closely to the electrode separating member than to the first light emitting device and the second light emitting device. Here, the electrode separating member diagonally separate the first lead frame and the second lead frame along a width direction of the body.

Abstract: Disclosed herein are a preparation method of graphene, capable of easily preparing a graphene flake having a smaller thickness and a large area, and a dispersed composition of graphene obtained using the same. The preparation method of graphene includes applying a physical force to dispersion of a carbon-based material including graphite or a derivative thereof, and a dispersant, wherein the dispersant includes a mixture of plural kinds of polyaromatic hydrocarbon oxides, containing the polyaromatic hydrocarbon oxides having a molecular weight of 300 to 1000 in a content of 60% by weight or more, and the graphite or the derivative thereof is formed into a graphene flake having a thickness in nanoscale under application of a physical force.

Abstract: Embodiments relate to a light emitting device package having an improved luminous flux, and the light emitting device package includes a body including a cavity, a first lead frame and a second lead frame exposed on a bottom surface of the cavity and separate from each other by an electrode separating member, a first light emitting device disposed on the first lead frame, a second light emitting device disposed on the second lead frame, and a Zener diode disposed on the first lead frame or the second lead frame, and disposed more closely to the electrode separating member than to the first light emitting device and the second light emitting device. Here, the electrode separating member diagonally separate the first lead frame and the second lead frame along a width direction of the body.

Abstract: The present invention relates to a conducting material composition capable of forming an electrode in which at least two kinds of carbon based materials are contained in a uniformly dispersed state to enable a battery such as a lithium rechargeable battery having more improved electrical and lifetime characteristics to be provided, and a slurry composition for forming an electrode of a lithium rechargeable battery and a lithium rechargeable battery using the same. The conducting material composition contains: at least two kinds of conductive carbon-based materials selected from the group consisting of carbon nano tube, graphene, and carbon black; and a dispersant containing a plurality kinds of poly aromatic hydrocarbon oxides, wherein the dispersant contains poly aromatic hydrocarbon oxides having a molecular weight of 300 to 1000 at a content of 60 wt.% or more.

Abstract: Disclosed is a novel polyene-specific glycosyltransferase derived from Pseudonocardia autotrophica. The glycosyltransferase includes an amino acid sequence of SEQ ID NO: 1 and a gene encoding the glycosyltransferase. The glycosyltransferase is produced by a method which includes the steps of: culturing transgenic recombinant microorganisms; and isolating glycosyltransferase from the cultured recombinant microorganisms.

Abstract: An epoxy resin composition provided according to one embodiment of the present invention includes: a triazine derivative epoxy compound; a siloxane compound including a cycloaliphatic epoxy group and a siloxane group; and a curing agent, where the epoxy resin composition includes 10 to 70 parts by weight of the siloxane group with respect to 100 parts by weight of the siloxane compound, thereby providing a composition excellent in heat resistance, light resistance, and excess moisture tolerance, with good shear adhesion to silicone, and capable of semi-solidification.