Abstract:
PURPOSE: A method for manufacturing an electromagnetic wave shielding agent and an absorbent is provided to obtain porous nano silicon carbide with excellent oxidation resistance at high temperature and properties. CONSTITUTION: A method for manufacturing an electromagnetic wave shielding agent and an absorbent comprises the steps of: mixing polymer precursors and silicon compounds, or polymer precursors, silicon compounds and conductive carbon material, with a solvent; electrospinning the mixture; heat-treating the electrospinned product to prepare porous nano silicon carbide with excellent oxidation resistance at high temperature; and preparing an electromagnetic wave shielding agent and an absorbent using the porous nano silicon carbide.
Abstract:
고온에서 내산화성을 갖는 다공성 나노 탄화규소 및 그 제조방법이 개시된다. 본 발명에 따른 내산화성을 갖는 다공성 나노 탄화규소의 제조방법은, (1) 폴리머 전구체와 실리콘다이옥사이드를 용매와 혼합하는 단계; (2) 상기 '단계 (1)'의 과정을 통하여 얻어진 혼합물을 구형상 또는 섬유형상으로 전기방사하는 단계; 및 (3) 상기 '단계 (2)'의 과정을 통하여 얻어진 전기방사 결과물에 열처리를 하는 단계를 포함하여 이루어진다. 다공성, 탄화규소, 전기방사, 내산화성
Abstract:
PURPOSE: A method for manufacturing an electromagnetic wave shielding agent and an absorbent is provided to obtain porous nano silicon carbide with excellent oxidation resistance at high temperature and properties. CONSTITUTION: A method for manufacturing an electromagnetic wave shielding agent and an absorbent comprises the steps of: mixing polymer precursors and silicon compounds, or polymer precursors, silicon compounds and conductive carbon material, with a solvent; electrospinning the mixture; heat-treating the electrospinned product to prepare porous nano silicon carbide with excellent oxidation resistance at high temperature; and preparing an electromagnetic wave shielding agent and an absorbent using the porous nano silicon carbide.
Abstract:
PURPOSE: A producing method of an anatase titanium oxide optical catalyst, and the anatase titanium oxide optical catalyst are provided to activate an anatase titanium oxide by weak visible rays with the excellent light resolution ability. CONSTITUTION: A producing method of an anatase titanium oxide optical catalyst responsive to visible rays comprises the following steps: mixing an anatase titanium oxide with a monosaccharide material; adding a dehydrating agent into the mixture; dehydrating the mixture by heating; filtering the obtained product with water for removing foreign materials; drying the obtained product; and processing the product with fluorine.
Abstract:
PURPOSE: A gas dissolution equipment for treatment of a drinking water and a wastewater is provided to save power consumption while increase the usage of gas. CONSTITUTION: A gas dissolution equipment for treatment of a drinking water and a wastewater is comprised of a target water supply unit(3), a gas supply unit(4), and a reaction tank having a porous plate(9). A target water and gas are passed through the gas dissolution equipment, thereby allowing them to be efficiently contacted with each other. Bubbles are raised and collided with the bottom of the porous plate, causing an undercurrent, and then they are bumped with the rising bubbles and are increased. The bubbles are passed through the holes of the porous plate to be split into small bubbles.
Abstract:
PURPOSE: A water treatment device is provided to remarkably reduce construction costs and repair costs of the device by using only magnet-attached perforated plate, and to improve treated water while reducing water treatment time. CONSTITUTION: A water treatment device comprises a magnet-attached perforated plate(3) in which a perforated plate made of iron, stainless steel, aluminum, copper, plastic, or acryl etc, a permanent magnet(1), or an electromagnet is attached. The water treatment device comprises a movable brush, a stirrer, and a water spraying device.
Abstract:
PURPOSE: An inclined plate-based precipitating pond for disposing water and sewage is provided to minimize the moving distance of sludge in case of the discharge of the sludge by reducing the inclined angle of an inclined plate. CONSTITUTION: A inclined plate-based precipitating module(2) is formed at an inclined plate-based precipitating pond(1). When target water is introduced into the precipitating module, granule-shaped materials and floc contained in the target water are precipitated on an inclined plate(4). The inclined angle of a unit of the precipitating module is between 30 and 60 degrees. Sludge is discharged through sludge discharging paths(5, 6) based on the gravity of the precipitated floc.