Abstract:
PROBLEM TO BE SOLVED: To provide inexpensively-producible semiconductor particles each having a uniform composition, and to provide a method for producing the same.SOLUTION: The method for producing semiconductor particles includes: a cation mixture liquid preparation step for preparing a cation mixture liquid by mixing together a copper ion source, a zinc ion source, a tin ion source, a ligand which suppresses bonding reactions between ions, and water; a precursor solution preparation step for preparing a precursor solution by mixing the prepared cation mixture liquid with a sulfur ion source; a sealing step for placing the prepared precursor solution in a vessel and sealing the vessel containing the precursor solution; and a hydrothermal synthesis reaction step for generating a hydrothermal synthesis reaction in the sealed vessel. The semiconductor particles include copper, zinc, tin and sulfur, which are observed in X-ray diffraction analysis to have single-phase peaks, and whose particle size of primary particles is ≤100 nm.
Abstract:
PROBLEM TO BE SOLVED: To provide a damping material whose damping property is improved, and to provide a damping structure capable of performing damping under active control. SOLUTION: A plate-like piezoelectric body has piezoelectric characteristic inclination structure in which the distribution of piezoelectric distortion constant in the surface of the plate-like body is inhomogeneous and inclined. A braking structure is provided with the piezoelectric body having the piezoelectric characteristic inclination structure as a damping structure. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an ultrasonic nondestructive measuring method easily determining a depth directional elastic property of a measuring object with high measuring accuracy, and also to provide an ultrasonic nondestructive measuring apparatus used therefor. SOLUTION: This ultrasonic nondestructive measuring method using surface wave comprises: emitting an ultrasonic pulse containing components of a plurality of frequencies from an ultrasonic oscillator to the measuring object to generate a surface reflected wave and a surface propagating wave; receiving the surface reflected wave and the surface propagating wave to separate waveforms in the plurality of frequencies by use of frequency band filters F1-Fn; finding, from each of the separated waveforms, propagation time difference Δt1-Δtn and surface wave sound velocity V1-Vn; then calculating a phase velocity of every frequency; and finding an elastic property such as hardness in a plurality of depths of the measuring object from the phase velocity. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a lubricating ceramic material provided with excellent lubricating performance. SOLUTION: The ceramic material 2 is provided with a ceramic matrix 4 and a dehydrogenation reaction phase 7 of a hydrocarbon at least in the surface 6 side of the ceramic material 2. The lubricity is exhibited on the surface of the material in the presence of the hydrocarbon by using dehydrogenation reaction of the hydrocarbon in the dehydrogenation reaction phase 7. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method for a seed crystal in which a multilayered highly oriented zeolite seed crystal is formed in situ on the surface of a substrate, a seed crystal obtained by the method, and a manufacturing method for a zeolite membrane in which a multilayered zeolite membrane is formed stably in a single system. SOLUTION: The manufacturing method for the seed crystal comprises a process in which the substrate is immersed in an aqueous solution comprising water, zeolite materials, and a template component and containing 0.6-4.0 mass% SiO 2 component to crystallize the multilayered seed crystal oriented in a desired direction on the surface of the substrate. The seed crystal is formed on the surface of the substrate by this method. The manufacturing method for the zeolite membrane comprises a process in which the zeolite seed crystal is immersed in a vessel, and an upper part of the immersed part is kept at a higher temperature to keep it in a solution condition and a lower part thereof is kept in a lower temperature to keep it in a mixed solution condition containing a gel and/or solid, and the zeolite seed crystal is grown to obtain this multilayered zeolite membrane. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a metal oxide thin film which has high hardness and excellent transparency and which has hydrophilicity, anti-fog anti-stain property, and self cleaning property for a long period of time, provide its manufacturing method, and provide a hydrophilic mirror having the hydrophilic metal oxide thin film. SOLUTION: The surface of a metal oxide thin film formed integrally with the surface of a substrate has an arithmetical mean roughness Ra of 4-8 nm, a maximum roughness (the maximum concavo-convex difference ) Rz of 40-70 nm, a ten-point mean roughness Rz (JIS) of 20-60 nm, and a concavo-convex pitch of 10-300 nm, which are measured with an atomic force microscope. The manufacturing method for the metal oxide thin metal comprises a raw material solution preparing process where metal oxides and ultra-fine particles are added into a solvent and mixed, a film forming process where the resultant raw material solution is applied to the surface of the substrate to form a film, and a baking process where the thin film dried is baked onto the substrate. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a laminated piezoelectric actuator in which the deterioration of the piezoelectric characteristic of a piezoelectric plate is reduced. SOLUTION: In this laminated piezoelectric actuator, the electrode material of an electrode layer contains a metallic component and an electrically conductive oxide. Namely, the deterioration of the piezoelectric plate can be prevented by supplying oxygen to a piezoelectric material from an electrode by adding the electrically conductive material using oxygen ions as carriers to the electrode material. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a hydrogen generation structure improved in the efficiency of transmitting hydrogen and to obtain a reforming composite material improved in the efficiency of a reforming reaction. SOLUTION: An adsorption/reforming layer 11 is porous and is constituted of a porous substrate having through-holes having a diameter larger than that of a pore. Fine ceramic particles 20 that constitute the porous substrate exist within the layer 11. A number of pores 21 having a pore diameter of 0.5-5 nm are formed on the surface of each ceramic particle. The ceramic particles 20 are arranged at intervals of several to several tens μm, and the continuations of these gaps form through-holes 22. Each pore 21 has the function of concentrating methane by adsorbing and condensing a natural gas as the starting gas, and the through-holes 22 have the function of diminishing the pressure loss of the natural gas across the layer 11.
Abstract:
PROBLEM TO BE SOLVED: To provide a producing method of amorphous silica particles which have low production cost and high sphericity. SOLUTION: This producing method of amorphous silica particles is featured by comprising a stage of supplying raw material which supplies silicon powder and silica powder together with a carrier gas into a reaction chamber, a burning and heating stage of burning the supplied silicon powder in the reaction chamber, generating heat, heating the resultant silica and the silica powder and dissolving or vaporizing the same and a cooling stage of cooling the dissolved and vaporized silica and forming the amorphous silica particles. Therein, the silica is made to a complete sphere owing to the surface tension by melting and is made to the amorphous silica particles having high sphericity by being cooled as it is. Further, by being vaporized once, the silica is made to the amorphous silica having high sphericity when cooled and flocculated.
Abstract:
PROBLEM TO BE SOLVED: To obtain highly conductive powder which has a high filling rate and high heat conductivity and is useful as a filler for semiconductor-sealing resins, and the like by disposing highly heat-conductive coating films on the surfaces of the spherical particles of a metal oxide. SOLUTION: Highly heat-conductive powder comprises particles having structures obtained by disposing coating films (preferably coating films comprising the nitride of a metal) having higher heat conductivity than that of the oxide of the metal (preferably B2O3, Al2O3, SiO3, MgO, TiO) on the surfaces of spherical particles comprising the oxide of the metal. The oxide of the metal and the coating film preferably comprise Al2O3 and AlN, respectively, and the oxide of the metal and the coating film further preferably comprise SiO2 and Si3N4, respectively. A ratio of the thickness of the coating film to the radials of the particles is 0.05 to 0.6. The powder can be obtained by nitriding the oxide of the metal. It is preferable that the heat conductivity of the obtained powder is equal to that of the coating film.