Abstract: The present invention relates to a color-changing sensor for gas detection and a method for manufacturing same and, more particularly, to a color-changing sensor that can be used for detecting hydrogen gas, in which when the sensor comes into contact with hydrogen gas, color conversion occurs so that it is possible to easily check the presence of hydrogen gas, and when the sensor is not in contact with hydrogen gas by removal of hydrogen gas or the like, the sensor may exhibit a reversible characteristic of being restored to an original color and an irreversible characteristic of not being restored to an original color.

Abstract: Provided is a cleaning device for cleaning a magnet powder including: a flask provided to contain the magnet powder and a cleaning material used to clean the magnet powder; and a vacuum manifold provided to maintain the magnet powder and the cleaning material contained in the flask in an inert state during cleaning. Provided is a method for cleaning a magnet powder including a loading operation for loading a magnet powder, a cleaning solution, and zeolite into a flask; a gas injecting operation for injecting an inert gas into the flask; and a vacuum drying operation for drying the magnet powder and the zeolite in a vacuum.

Abstract: A method for manufacturing a gas sensor may be provided, the method comprising the steps of: preparing a metal nanowire; manufacturing a thermoelectric composite by adding a polymer bead to the metal nanowire, and then mechanically mixing same; manufacturing a thermoelectric layer by hot-pressing the thermoelectric composite; forming a first electrode on the upper surface of the thermoelectric layer, and forming a second electrode on the lower surface of the thermoelectric layer; and disposing a heating catalyst layer on the first electrode.

Abstract: Provided is a capacitive gas sensor. The capacitive gas sensor comprises a sensitive material for adsorbing and desorbing a target gas, an upper electrode surrounding the sensitive material, a lower electrode facing the upper electrode, and a porous structure disposed between the upper electrode and the lower electrode, wherein the capacitance of the sensitive material changes as the sensitive material adsorbs and desorbs the target gas.

Abstract: Disclosed is a gas sensor. The gas sensor comprises: a substrate; a thermoelectric layer which is disposed on the substrate and has a metal nanowire; a first electrode and a second electrode disposed to be spaced apart from each other on the thermoelectric layer; and a catalyst layer which is disposed on the first electrode and has a composite structure in which a metal particle is bonded to a carbon structure.

Abstract: A thermochemical sensor is provided. The thermochemical sensor comprises: a substrate structure comprising a thermoelectric surface having concave portions and convex portions; a base fiber disposed on the thermoelectric surface of the substrate structure; and a catalyst layer that conformally covers the thermoelectric surface of the substrate structure and the base fiber.

Abstract: A thermal dissipation composite material comprising: a matrix including a polymer material; and composite particles distributed in the matrix, wherein the composite particles include a filler, and a thermally conductive material coated on the surface of the filler by an inorganic coating layer, and wherein the plurality of thermally conductive materials coated by the inorganic coating layer are connected to each other on the surfaces of the plurality of composite particles so as to establish a heat transfer network.

Abstract: Provided are a nanostructure network and a method of fabricating the same. The nanostructure network includes nanostructures having a poly-crystalline structure formed by self-assembly of the nanostructures. The method includes preparing a nanostructure solution in which nanostructures are dispersed in a first solvent, forming a nanostructure ink by adding the nanostructure solution into a second solvent having a viscosity higher than that of the first solvent, coating a surface of a substrate with the nanostructure ink, and forming a nanostructure network by evaporating the first solvent and the second solvent included in the nanostructure ink coated on the substrate.

Abstract: The present invention relates to a gas sensor and a manufacturing method thereof. A sensor body of the gas sensor is formed by cutting a multi-layered ceramic/metal platform where a plurality of sequential layer structures of a ceramic dielectric material and metal are layered in a layering direction. The sensor body includes at least one layered body wherein a ceramic dielectric material, a first internal electrode, a ceramic dielectric material, and a second internal electrode are sequentially layered. The first internal electrode and the second internal electrode are exposed through a cut surface by cutting. The first internal electrode is electrically connected to a first electrode terminal disposed on a first side of the sensor body, and the second internal electrode is electrically connected to a second electrode terminal disposed on a second side of the sensor body facing the first side.

Abstract: A method for preparing an anion adsorbent may be provided, which comprises the steps of: mixing at least two metal salts with each other, thereby forming a stack structure in which cationic compound layers and anionic compound layers containing anions and water of crystallization are alternately stacked on one another; performing a first heat treatment on the stack structure to expand between the cationic compound layers, thereby preparing a preliminary anion adsorbent; and performing a second heat treatment on the preliminary anion adsorbent to remove the anions and the water of crystallization from the anionic compound layers while allowing at least one of the anions to remain, thereby preparing the anion adsorbent.

Abstract: Provided is a method for manufacturing a magnetic nano-structure. The method for manufacturing a magnetic nano-structure may comprise the steps of: preparing a source solution containing a first precursor including a rare-earth element, a second precursor including a transition metal element, and a third precursor including Fe; electrospinning the source solution to form a preliminary magnetic nano-structure containing a rare-earth oxide, a transition metal oxide, and a Fe oxide; and reducing the preliminary magnetic micro-structure to manufacture a magnetic nano-structure containing an alloy composition of the rare-earth element, the transition metal element, and the Fe.

Abstract: Provided is a preparation method of magnetic nanostructures. The preparation method of magnetic nanostructures may comprise the steps of: preparing a source solution comprising a first precursor comprising a rare earth element, a second precursor comprising a transition metal element, and a third precursor comprising Cu; electrospinning the source solution to form preliminary magnetic nano-structures comprising a rare-earth element oxide, a transition metal oxide, and Cu oxide; and reducing the preliminary magnetic nano-structures to produce magnetic nano-structures comprising an alloy composition comprising the rare-earth element, the transition metal element, and the Cu.

Abstract: A method for manufacturing a gas sensor may be provided, the method comprising the steps of: preparing a porous base substrate; providing, on the porous base substarte, a source solution having graphene dispersed in a base solvent; manufacturing a graphene-impregnated base substrate by means of a driving process; and forming a first electrode and a second electrode on the graphene-impregnated base substrate.

Abstract: Disclosed is a gas sensor. The gas sensor comprises: a substrate; a thermoelectric layer which is disposed on the substrate and has a metal nanowire; a first electrode and a second electrode disposed to be spaced apart from each other on the thermoelectric layer; and a catalyst layer which is disposed on the first electrode and has a composite structure in which a metal particle is bonded to a carbon structure.

Abstract: Disclosed is a catalyst of a fiber form having improved the lifespan performance while being applied to the oxidation-reduction reaction of a high temperature and a manufacturing method thereof. Particularly, disclosed is a composite nanofiber catalyst including a support having a fiber form and a metal catalyst included in the support and a manufacturing method thereof.

Abstract: Disclosed are a nanocomposite including a catalytic material and a porous support having a structure of a blocky structure, a spherical structure, and a combination thereof and a manufacturing method thereof. The nanocomposite may have improved the lifespan performance while being applied to the oxidation-reduction reaction of a high temperature.

Abstract: A method for preparing an anion adsorbent may be provided, which comprises the steps of: mixing at least two metal salts with each other, thereby forming a stack structure in which cationic compound layers and anionic compound layers containing anions and water of crystallization are alternately stacked on one another; performing a first heat treatment on the stack structure to expand between the cationic compound layers, thereby preparing a preliminary anion adsorbent; and performing a second heat treatment on the preliminary anion adsorbent to remove the anions and the water of crystallization from the anionic compound layers while allowing at least one of the anions to remain, thereby preparing the anion adsorbent.

Abstract: A method for manufacturing a gas sensor may be provided, the method comprising the steps of: preparing a porous base substrate; providing, on the porous base substarte, a source solution having graphene dispersed in a base solvent; manufacturing a graphene-impregnated base substrate by means of a driving process; and forming a first electrode and a second electrode on the graphene-impregnated base substrate.

Abstract: A method for manufacturing a gas sensor may be provided, the method comprising the steps of: preparing a metal nanowire; manufacturing a thermoelectric composite by adding a polymer bead to the metal nanowire, and then mechanically mixing same; manufacturing a thermoelectric layer by hot-pressing the thermoelectric composite; forming a first electrode on the upper surface of the thermoelectric layer, and forming a second electrode on the lower surface of the thermoelectric layer; and disposing a heating catalyst layer on the first electrode.

Abstract: A thermochemical sensor is provided. The thermochemical sensor comprises: a substrate structure comprising a thermoelectric surface having concave portions and convex portions; a base fiber disposed on the thermoelectric surface of the substrate structure; and a catalyst layer that conformally covers the thermoelectric surface of the substrate structure and the base fiber.