Abstract:
A method of producing alloy nanoparticles includes the steps of: adding a metallic salt, a reducing agent, a stabilizing ligand, and an organic iron complex to an organic solvent selected from the group consisting of 2-20C hydrocarbon, alcohol, ether, and ester in an inert gas atmosphere to obtain a reaction liquid; and stirring the reaction liquid while heating the reaction liquid to a predetermined temperature. The grain diameter of the alloy nanoparticle is controlled by regulating the amount of the stabilizing ligand.
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing technology for improving the strength of a composite metal material which uses a carbon nano-material as a reinforcing material. SOLUTION: The carbon nano-material 30 with fine particles deposited thereon has a layer 31 of carbide-forming fine particles covering a carbon nano-material 13. The carbon nano-material 30 with fine particles deposited thereon is mixed into a matrix metal material. The carbon nano-material 13 has the carbide-forming fine particles depositing on the surface. Then, a reactive layer of SiC, for instance, is formed on the interface, and makes the layer 31 of the carbide-forming fine particles be strongly bonded to the carbon nano-material 13. Accordingly, it is not worried that the layer 31 of the carbide-forming fine particles may exfoliate from the carbon nano-material 13. The layer 31 of the carbide-forming fine particles is adequately bonded to the matrix metal as well. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a soft magnetic material and a dust core which have superior flexural strength under a high temperature. SOLUTION: The soft magnetic material includes a plurality of composite magnetic particles 30 having metal magnetic particles 10 and insulating coatings 20 surrounding surfaces of the metal magnetic particles 10, aromatic polyetherketone resin 40, and inorganic lubricant 50 having metallic soap in a particulate shape with mean particle diameters of 2.0 μm or less and/or a crystal structure of a hexagonal system. Insulating coating 20 comprises phosphate. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
【課題】低速回転から高速回転までの可変速駆動を行う回転電機において、高速回転域での効率の低下を抑制する。 【解決手段】永久磁石は、組成式:R p Fe q M r Cu t Co 100−p−q−r−t で表され、マトリクスを含む結晶粒と、粒界相と、を具備する。マトリクスは、Th 2 Zn 17 型結晶相を有するセル相と、セル相を分断するセル壁相と、複数のCu高濃度相と、を有する。マトリクスに対する複数のCu高濃度相の面積割合は、0.2%以上5.0%以下である。複数のCu高濃度相のうちの少なくとも一つのCu高濃度相の重心を中心とする半径3μmの円内に平均3個以上15個以下の他のCu高濃度相が分布している。 【選択図】図1