摘要:
Provided is a method of manufacturing porous ceramic bodies with gradient of porosity, in which a gradient that is continuous to a pore size and porosity is precisely controlled in a simple way. The method includes the steps of: obtaining molded bodies by pressurizing and molding a mixture of powder obtained by mixing ceramic powder and polymer powder at a weight ratio of 1:1 to 100:1; and obtaining sintered bodies with gradient of porosity by sintering the molded bodies while applying a gradient pressure to the molded bodies.
摘要:
Disclosed herein is a phosphate-based dielectric ceramic composition which has a low dielectric constant and a low dielectric loss in the high-frequency bands such as microwave and millimeter wave. The composition is represented by the following formula: (1-x)(A′1-yA″y)O-xP2O5 wherein x and y are numbers satisfying the following conditions: 0
摘要:
Disclosed herein is a light-responsive photocatalyst composition, which is a composite oxide semiconductor containing tungsten, and which can efficiently absorb visible light emitted from the sun and light emitted from interior lamps, such as fluorescent lamps, etc., and a method of preparing the light-responsive photocatalyst composition. The visible light-responsive photocatalyst composition can decompose volatile organic compounds or harmful organic matter causing sick house syndrome, even indoors, because it can be activated by visible light outdoors and can respond to light emitted from interior lamps, such as fluorescent lamps, etc.
摘要:
The present invention relates to a method and system for photocatalytically decomposing organic pollutants using the electromotive force of a solar cell. The present invention provides a method and system for decomposing organic pollutants, which can greatly increase the rate of decomposition of organic pollutants at low cost by combining a photocatalytic organic pollutant decomposition device, capable of decomposing organic pollutants using light energy, with a solar cell, capable of applying an external voltage to the photocatalytic organic pollutant decomposition device using light energy.
摘要:
Disclosed herein is a light-responsive photocatalyst composition, which is a composite oxide semiconductor containing tungsten, and which can efficiently absorb visible light emitted from the sun and light emitted from interior lamps, such as fluorescent lamps, etc., and a method of preparing the light-responsive photocatalyst composition. The visible light-responsive photocatalyst composition can decompose volatile organic compounds or harmful organic matter causing sick house syndrome, even indoors, because it can be activated by visible light outdoors and can respond to light emitted from interior lamps, such as fluorescent lamps, etc.
摘要:
Provided is a method for modifying the surface of a bioinert material, the method including preparing a base material composed of a bioinert material; and spraying a bioactive powder onto the bioinert base material through a spray nozzle using a high pressure carrier gas to form a bioactive layer on the base material. The surface modification method enables mass production, at low cost, of new biomaterials having the advantages of both a coating substance and a body to be coated, by applying a bioactive material to various bodies to be coated through a cold spray method.
摘要:
Disclosed herein is a biodegradable and bioactive glass-ceramic fabricated by mixing a slowly biodegradable glass-ceramic and a highly biodegradable glass-ceramic in a predetermined mixing ratio wherein the bioactivity is maintained to be constant, and the biodegradation rate is controlled by the mixing ratio. The biodegradable and bioactive glass-ceramic is fabricated from a composition consisting of calcium oxide (CaO), silica (SiO2), boron oxide (B2O3), magnesium oxide (MgO), calcium fluoride (CaF2) and phosphorus pentoxide (P2O5).
摘要翻译:本文公开了一种可生物降解和生物活性的玻璃陶瓷,其通过以预定的混合比混合缓慢生物降解的玻璃陶瓷和高度可生物降解的玻璃陶瓷,其中生物活性保持恒定,并且生物降解速率由混合比 。 可生物降解和生物活性的玻璃陶瓷由氧化钙(CaO),二氧化硅(SiO 2),氧化硼(B 2 O 3),氧化镁(MgO),氟化钙(CaF 2)和五氧化二磷(P 2 O 5)组成的组合物制成。
摘要:
Disclosed herein are a self-foamed porous ceramic composition and a method for making a porous ceramic using the self-foamed porous ceramic composition. The self-foamed porous ceramic is obtained by fabricating a glass consisting of 41˜47 mole % of calcium oxide (CaO), 41˜47 mole % of silica (SiO2) and 6˜18 mole % of borate (B2O3), pulverizing the glass into a finely-divided glass powder having an average particle size of 1˜10 μm, molding the glass powder, and sintering the molded glass powder.
摘要翻译:本文公开了自发泡多孔陶瓷组合物和使用自发泡多孔陶瓷组合物制造多孔陶瓷的方法。 自发泡多孔陶瓷是通过制造由41〜47摩尔%的氧化钙(CaO),41〜47摩尔%的二氧化硅(SiO 2/2)和6〜18摩尔% 的硼酸盐(B 2 O 3 O 3),将玻璃粉碎成平均粒度为1〜10μm的微细玻璃粉末,成型玻璃粉末, 烧结成型玻璃粉末。
摘要:
Disclosed is a dielectric ceramic composition suitable for use in planar or multilayer type electronic parts containing inner conductors, for the fabrication of which simultaneously sintering base materials and conductors is required. This ceramic composition is composed of (1−x)Ba3Ti4Nb4O21−(x)Ba(or Sr)Nb2O6(0
摘要:
Disclosed herein is a method of preparing a ternary oxide semiconductor compound, including the steps of: dissolving an inorganic salt source including Sn and an inorganic salt source including at least one selected from the alkali earth metal group consisting of Ba, Sr and Ca in a mixed solvent of water and hydrogen peroxide to form a mixed solution; precipitating the mixed solution by changing the PH thereof to obtain a precipitate and then aging the precipitate; and drying and then annealing the aged precipitate to prepare MSnO3 powder (here, M includes at least one selected from the group consisting of Ba, Sr and Ca). The method is advantageous in that a nanosized ternary oxide semiconductor compound having a uniform particle size distribution can be prepared.