Abstract:
Provided are a magnesium-based alloy and a manufacturing method thereof. In the method, a magnesium alloy is melted into liquid phase, and an alkaline earth metal oxide is added into a molten magnesium alloy. The alkaline earth metal oxide is exhausted through surface reduction reaction between the melt and the alkaline earth metal oxide. Alkaline earth metal produced by the exhaustion reacts with Mg and/or other alloying elements in the magnesium alloy so that an intermetallic compound is formed. The magnesium prepared by the method is excellent in fluidity and hot-tearing resistance. To this end, the alkaline earth metal oxide added is CaO, and the added amount of CaO is 1.4 to 1.7 times the target weight of Ca to be contained in the final Mg alloy.
Abstract:
PROBLEM TO BE SOLVED: To provide a solar cell manufacturing method making use of an inductive coupling plasma chemical vapor deposition method.SOLUTION: In manufacturing a solar cell 160 which includes a first electrode, a first type layer, an intrinsic layer, a second layer and a second electrode, there is included an intrinsic layer formation step for forming the intrinsic layer consisting of a hydride amorphous silicon thin film by making use of an inductive coupling plasma chemical vapor deposition apparatus which uses a mixed gas containing hydrogen (H) gas and silane (SiH) gas. The mixed gas has a silane gas to hydrogen gas ratio (H/SiHratio) of the silane gas to the hydrogen gas in it is 8 to 10.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a silicon nano-wire, a solar cell including the silicon nano-wire, and a method for manufacturing the solar cell. SOLUTION: The solar cell is provided which includes: a substrate; a first ++ type polycrystalline silicon layer equipped on the substrate; a first type silicon nano-wire layer including a first type silicon nano-wire grown from the first ++ type polycrystalline silicon layer; an intrinsic layer provided on the substrate having the first type silicon nano-wire layer; and a second type doping layer equipped on the intrinsic layer. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
Provided are an apparatus for carrying out a surface reaction of compound powders on the surface of a melt, and a surface reaction method using the same. The apparatus includes an injection unit configured to supply compound powders supplied through a hollow formed inside thereof, to a surface of a melt of metal or metal alloy held in a furnace, and a reaction promoting unit coupled to a lower end of the injection unit, formed of a material which is non-reactive with the melt, and rotating as being immersed into the surface of the melt.
Abstract:
A double helix gas hydrate reactor is disclosed. The reactor includes an inlet port (510) into which water and gas are supplied, an outlet port (540) disposed opposite the inlet port, a hollow jacket (580) extending from the inlet port to the outlet port, a hollow outer helix (550) installed in the hollow jacket, and an inner helix (560) installed in the outer helix. The gas and water that are supplied into the inlet port react with each other to form gas hydrate in a channel defined between the inner helix and the hollow jacket.
Abstract:
The present invention relates to a coating composition having excellent electro-conductivity and corrosion resistance, a method of preparing the coating composition, and an article coated with the coating composition. More particularly, the present invention relates to a coating com¬ position having excellent surface electro-conductivity and corrosion resistance, comprising: one or more base resins selected from the group consisting of a polyester resin, an epoxy resin, a polyurethane resin, an acrylic resin, a polyolefin resin, a fluorine resin, a polycarbonate resin and a phenol resin; a melamine-based curing agent; one or more selected from among carbon black and carbon nanotubes; metal powder; and organic clay, a method of preparing the coating com¬ position, and an article coated with the coating composition.
Abstract:
Disclosed herein is a fuel injection system, including: a fuel injection module including a primary fuel injector and one or more secondary fuel injectors disposed around the primary fuel injector; an air supply module for supplying air to the fuel injection module inwardly and outwardly; and a fuel supply module for supplying fuel to the fuel injection module, wherein the fuel injection module serves to generate multistage flames in a burner by forming a rich fuel flame region using the primary fuel injector and forming a lean fuel flame region behind the rich fuel flame region using the secondary fuel injectors through a burning process of gasifying secondary fuel.