Abstract:
PURPOSE: A method for manufacturing a ceramic coating layer for improving abrasion-resistance of a metal is provided to can obtain additional functions without abrasion-resistant effect by evaporating ceramic powder on one selected from titanium dioxide, aluminum oxide and yttria-stabilized zirconia. CONSTITUTION: A method for manufacturing a ceramic coating layer for improving abrasion-resistance of a metal comprises: a step of preparing a metal substrate; a step of heat-treating the ceramic powder at constant temperature; a step of forming a ceramic coating layer by evaporating through aerosol evaporation of the ceramic powder on the metal substrate. The ceramic powder is one selected from titanium dioxide(TiO2), aluminum oxide(Al2O3), yttria-stabilized zirconia, and ceria(CeO2). The metal substrate consists of one selected from magnesium or magnesium alloy, aluminum or aluminum alloy, carbon steel, and stainless steel. The heat treatment is conducted at the temperature of 500-700 °C, for 1-5 hours.
Abstract:
PURPOSE: A method for manufacturing gas detecting metal oxide-based nano-tube and a metal oxide-based gas sensor using the same are provided to increase the sensitivity with respect to target gas by increasing the surface area and the length of the nano-tube. CONSTITUTION: A nano fiber template(112) is formed by spinning a polymer solution. A metal oxide-based thin film(124) for detecting gas is deposited on the template through an atomic layer deposition method, and an intermediate structure is obtained. The intermediate structure is thermally treated, and the template is eliminated. Metal oxide-based nano-tube(134) is formed. A metal oxide-based gas sensor includes the network structure of nano-tubes and an electrode applying power to the network structure.
Abstract:
PURPOSE: A method for processing a fluorescent material using a planetary ball mill is provided to obtain fluorescent material powder of various sizes through a simple planetary ball mill process. CONSTITUTION: A method for processing a fluorescent material using a planetary ball mill includes the steps of: (S100) adding a solvent to a fluorescent material to perform planetary ball mill; (S110) separating the fluorescent material and a solvent and removing the solvent; (S120) drying the fluorescent material; and (S130) heating the fluorescent material. The solvent is ethanol and the planetary ball mill time is 12-48 hours.
Abstract:
PURPOSE: A method for manufacturing an alpha-sialon phosphor is provided to prepare an alpha-sialon phosphor with little surface defects and excellent light-emitting property at a fast speed. CONSTITUTION: A method for manufacturing an alpha-sialon phosphor comprises the steps of: (S1) weighing phosphor raw material powder required for the synthesis of the alpha-sialon phosphor and injecting the powder into a carbon mold; (S2) installing the carbon mold into which the phosphor raw material powder injected, in a chamber of a discharge plasma sintering device, and removing oxygen within the chamber; (S3) sintering the phosphor raw material powder through pressurization and temperature rise; and (S4) pulveriaing the sintered body to obtain the phosphor powder having the composition of chemical formula: M0.5m-xSi12-1.5mAl1.5mO0.5mN16-0.5m :Lnx.
Abstract:
PURPOSE: A manufacturing method of a nano silicon nitride based ceramics is provided to obtain the high purity nano silicon nitride based ceramics by reducing the excessive oxygen content through a carbon reduction process. CONSTITUTION: A manufacturing method of a nano silicon nitride based ceramics comprises the following steps: forming slurry by mixing a mixture containing nano silicon nitride powder and a sintering aid, a synthetic resin, and an organic solvent to dissolve the synthetic resin(10); obtaining raw material powder by drying the slurry(20); carbon reduction processing the raw material powder(30); and obtaining a sintered body by sintering the carbon reduction processed raw material powder(40).
Abstract:
나노구조물 가스센서는 기판, 상기 기판 위에 서로 이격되어 배치된 제1 전극과 제2 전극, 복수의 나노구조물들 및 가스의 흡착에 따라 상기 복수의 나노구조물들의 전기적 특성을 변화시키는 금속산화물층을 포함한다. 상기 복수의 나노구조물들은 상기 제1 전극과 상기 제2 전극을 연결한다.
Abstract:
PURPOSE: A nanostructure gas sensor with a metallic oxide layer, a nanostructure gas sensor array thereof, and a manufacturing method thereof are provided to easily control the size and thickness of a metallic oxide layer using a physical vapor deposition method. CONSTITUTION: A nanostructure gas sensor(300) with a metallic oxide layer comprises a substrate(110), first and second electrodes(120,130), multiple nanostructures(140), and a metallic oxide layer(150). The nanostructures are arranged on the substrate, and connect the first and second electrodes. The metallic oxide layer changes the electrical characteristics of the nanostructures.