Abstract: It is introduced that a device of manufacturing lithium sulfate comprising: a reaction body in which a reaction of lithium phosphate and sulfuric acid is performed, the reaction body being divided into an upper space and a lower space; a pressurizer for applying pressure to the inside of the reaction body; a stirrer disposed in the upper space for stirring the lithium phosphate and sulfuric acid to produce a mixture containing lithium sulfate and phosphoric acid; and a filter disposed inside the reaction body and separating the filtrate containing the phosphoric acid into the lower space by filtering the mixture.

Abstract: Provided are a method for preparing a polyetherketoneketone and a polyetherketoneketone prepared thereby, wherein, at the time of a polymerization reaction, nitrogen gas is blown into a liquid reaction medium while stirring, thereby quickly removing hydrochloric acid, which is a by-product generated during the reaction, and preventing aggregation of resin particles, thus suppressing the generation of scales.

Abstract: The present invention relates to a connective installation structure for modularized windows and doors, the connective installation structure successively arranging and connectively installing, in the horizontal direction, modularized sliding windows, doors, or door windows that form the window and doors of a building, with fixed windows arranged in the spaces between the windows and doors.

Abstract: The present invention relates to a connective installation structure for modularized windows and doors, the connective installation structure successively arranging and connectively installing, in the horizontal direction, modularized sliding-type doors and windows, doors, or door-type windows that form the window and doors of a building, with fixed windows arranged in the spaces between the windows and doors.

Abstract: The present invention relates to a method of producing lithium hydroxide from a lithium concentrate through sodium sulfate addition and roasting. The method effectively recover lithium ions from the lithium concentrate, minimizes production of byproducts, and produces high-purity lithium hydroxide. By mixing a concentrate containing lithium with sodium sulfate (Na2SO4), roasting the concentrate, and leaching the roasted concentrate with water, it is possible to recover lithium ions at a high recovery rate and to produce high-purity lithium hydroxide monohydrate.

Abstract: The present invention relates to an installation structure of an auxiliary locking device for a hinged door, and by operating a rotation lever installed on a door frame separately from a generally used security main locking device, the rotating opening side of the hinged door is vertically attached to the door frame in close contact with the door frame at a number of points in the longitudinal direction, and in order to make it easier to fix and maintain such a tight state. More particularly, the present invention is directed to providing new installation structure of the auxiliary locking device of the hinged door capable of preventing the mutual interference of the driving plate and locking piston, even if the longitudinal installation range of the driving plate is overlapped with the operating range of the locking piston constituting the second locking tool.

Abstract: The present invention relates to a moving window installation structure of a sliding window system. More specifically, the present invention relates to a moving window installation structure of a sliding window system which is configured to prevent a vertical reaction force from being applied between a rail and a roller for supporting the weight of a moving window that constitutes a sliding window having an aluminum alloy sash structure such that the moving window can be smoothly moved in a direction perpendicular to the longitudinal direction of the rail and the sliding mobility of a large-sized window having a heavy weight can be improved, and to improve a profile cross-section structure of a window installation frame provided with a sliding window such that heat insulation can be remarkably improved and wind pressure resistance against wind pressure can be enhanced.

Abstract: The present invention relates to a door hinge height adjusting device that can adjust the relative vertical position of a second support bracket with respect to a first support bracket in a door hinge that rotatably connects one side surface of a door forming a rotating door to a support frame in a door frame, the door hinge comprising: the first support bracket which is fixedly connected to the support frame side of a door frame; the second support bracket which is fixedly connected to the door side; and a hinge portion which is provided between the first support bracket and the second support bracket, for relative rotation.

Abstract: The present invention relates to a door hinge height adjusting device that can adjust the relative vertical position of a second support bracket with respect to a first support bracket in a door hinge that rotatably connects one side surface of a door forming a rotating door to a support frame in a door frame, the door hinge comprising: the first support bracket which is fixedly connected to the support frame side of a door frame; the second support bracket which is fixedly connected to the door side; and a hinge portion which is provided between the first support bracket and the second support bracket, for relative rotation.

Abstract: The present invention relates to a door guide frame for guiding the sliding movement of a roller device which supports a sliding window and provides a sliding opening/closing operation and, more specifically, to a sliding window installation structure which: stably supports and moves a sliding window on a bottom surface and an upper surface on which the sliding window is installed; reduces an installation space by minimizing the size of a door guide frame and a roller device for supporting a heavy sliding window, thereby obtaining a wider open view when applied to a window; enables vertical stiffeners having an expanded cross section (cross section thicker than glass) for compensating a transverse bending rigidity of glass to be connected to both sides of the glass which constitutes the sliding window formed by including the glass that is supported by a roller; and enables the sliding window with the vertical stiffeners to be installed within the door guide frame in an integrated manner and the sliding window

Abstract: Provided are a method for fabricating a semiconductor device The method for fabricating include providing a substrate including a first region and a second region, the first region including first and second sub-regions, and the second region including third and fourth sub-regions, forming first to fourth fins on the first and second regions to protrude from the substrate, the first fin being formed on the first sub-region, the second fin being formed on the second sub-region, the third fin being formed on the third sub-region, and the fourth fin being formed on the fourth sub-region, forming first to fourth dummy gate structures to intersect the first to fourth fins, the first dummy gate structure being formed on the first fin, the second dummy gate structure being formed on the second fin, the third dummy gate structure being formed on the third fin, and the fourth dummy gate structure being formed on the fourth fin, forming a first doped region in each of the first and second fins and a second doped region

Abstract: The present invention relates to the installation structure of a rail frame for guiding a sliding movement of a roller apparatus of a sliding insect window screen which is capable of supporting a sliding insect window screen and providing a sliding opening/closing action of the sliding insect screen. more particularly relates to the sliding insect window screen comprising the rail frame which can more stably support the sliding insect window screen on the top surface and on the bottom surface, so even if a strong wind blows against the sliding insect screen, it is possible for the sliding insect window screen to maintain a stable state without shaking movement.

Abstract: Provided are a method for fabricating a semiconductor device The method for fabricating include providing a substrate including a first region and a second region, the first region including first and second sub-regions, and the second region including third and fourth sub-regions, forming first to fourth fins on the first and second regions to protrude from the substrate, the first fin being formed on the first sub-region, the second fin being formed on the second sub-region, the third fin being formed on the third sub-region, and the fourth fin being formed on the fourth sub-region, forming first to fourth dummy gate structures to intersect the first to fourth fins, the first dummy gate structure being formed on the first fin, the second dummy gate structure being formed on the second fin, the third dummy gate structure being formed on the third fin, and the fourth dummy gate structure being formed on the fourth fin, forming a first doped region in each of the first and second fins and a second doped region

Abstract: The present invention relates to a door guide frame for guiding the sliding movement of a roller device which supports a sliding window and provides a sliding opening/closing operation and, more specifically, to a sliding window installation structure which: stably supports and moves a sliding window on a bottom surface and an upper surface on which the sliding window is installed; reduces an installation space by minimizing the size of a door guide frame and a roller device for supporting a heavy sliding window, thereby obtaining a wider open view when applied to a window; enables vertical stiffeners having an expanded cross section (cross section thicker than glass) for compensating a transverse bending rigidity of glass to be connected to both sides of the glass which constitutes the sliding window formed by including the glass that is supported by a roller; and enables the sliding window with the vertical stiffeners to be installed within the door guide frame in an integrated manner and the sliding window

Abstract: The present invention relates to a moving window installation structure of a sliding window system. More specifically, the present invention relates to a moving window installation structure of a sliding window system which is configured to prevent a vertical reaction force from being applied between a rail and a roller for supporting the weight of a moving window that constitutes a sliding window having an aluminum alloy sash structure such that the moving window can be smoothly moved in a direction perpendicular to the longitudinal direction of the rail and the sliding mobility of a large-sized window having a heavy weight can be improved, and to improve a profile cross-section structure of a window installation frame provided with a sliding window such that heat insulation can be remarkably improved and wind pressure resistance against wind pressure can be enhanced.

Abstract: The present invention provides an apparatus for manufacturing a truss structure using multi-point pins, a method of manufacturing a truss structure using the apparatus, a truss core sandwich panel having the truss structure, and a method of manufacturing the truss core sandwich panel. The apparatus includes a metal plate, clamps, an upper die and a lower die. The clamps hold the metal plate. The upper die has upper multi-point pins which press the metal plate downwards. The lower die has lower multi-point pins which press the metal plate upwards. The metal plate has first and second points that respectively correspond to the upper and lower multi-point pins. The first points are extended downwards by the upper multi-point pins, and the second points are extended upwards by the lower multi-point pins. Thereby, many symmetrical sides are formed in the truss structure, thus increasing the stability of the truss structure.

Abstract: Provided are a magnesium alloy sheet having improved formability at room temperature and a method for manufacturing same. According to one embodiment of the present invention, the method for manufacturing the magnesium alloy sheets having improved formability at room temperature is characterized by comprising a first pretreatment step of applying residual compression stress to the surface the magnesium alloy raw material.

Abstract: The present invention provides an apparatus for manufacturing a truss structure using multi-point pins, a method of manufacturing a truss structure using the apparatus, a truss core sandwich panel having the truss structure, and a method of manufacturing the truss core sandwich panel. The apparatus includes a metal plate, clamps, an upper die and a lower die. The clamps hold the metal plate. The upper die has upper multi-point pins which press the metal plate downwards. The lower die has lower multi-point pins which press the metal plate upwards. The metal plate has first and second points that respectively correspond to the upper and lower multi-point pins. The first points are extended downwards by the upper multi-point pins, and the second points are extended upwards by the lower multi-point pins. Thereby, many symmetrical sides are formed in the truss structure, thus increasing the stability of the truss structure.

Abstract: A method for enhancing electrical conductivity of a film which includes at least one conductive polymer. The method includes providing the film comprising the at least one conductive polymer and at least one polymer acid, agitating the film in at least one reagent; and, placing the film on a heated surface. The at least one reagent includes a reagent acid that is stronger than the polymer acid. The conductivity of the treated film is significantly greater than the conductivity of the untreated film.

Abstract: A method for enhancing electrical conductivity of a film which includes at least one conductive polymer. The method includes providing the film comprising the at least one conductive polymer and at least one polymer acid, agitating the film in at least one reagent; and, placing the film on a heated surface. The at least one reagent includes a reagent acid that is stronger than the polymer acid. The conductivity of the treated film is significantly greater than the conductivity of the untreated film.