Abstract:
PURPOSE:To improve oxidation resistance and corrosion resistance and suppress deterioration in the lapse of time. CONSTITUTION:Straight chain monocarboxylic acid of 20-30C is adsorbed to the surface of magnetic metal powder composed of strong magnetic metal material or strong magnetic alloy material and a straight chain monocarboxylic acid film is formed on the surface of the magnetic metal powder.
Abstract:
PURPOSE:To enhance the stability of the magnetic recording medium with lapse of time and to provide the magnetic recording medium having excellent preservable stability. CONSTITUTION:Naphthalene dicarboxylic acid and/or the acid anhydride thereof is added into a magnetic coating material consisting essentially of magnetic powder and a binder at the time of forming a magnetic layer by using iron or ferromagnetic metallic particles constituted of the iron as the magnetic powder and applying the magnetic coating material consisting essentially of such magnetic powder and the binder on a nonmagnetic base. The naphthalene dicarboxylic acid and/or the acid anhydride thereof is otherwise incorporated into the above-mentioned magnetic layer by using the ferromagnetic metallic particles previously subjected to a surface treatment in water or org. solvent contg. the naphthalene dicarboxylic acid and/or the acid anhydride thereof as the above-mentioned magnetic powder. The oxidation resistance as the medium is improved and the deterioration of the magnetic characteristics with lapse of time is suppressed.
Abstract:
PURPOSE:To achieve a higher oxidation resistance by setting an indicator for acidity of a treating agent used for surface treatment as pi charge on a hetero atom based on a molecule orbit calculation approximate to a simple pi electron to perform a surface treatment using an organic acid with the charge in a fixed range. CONSTITUTION:A ferromagnetic metal material or a ferromagnetic alloy material comprising fine particles undergoes a surface treatment by an organic acid with acidity of +0.15 to +0.5 in terms of pi charge on a hetero atom based on a molecule orbit calculation approximate to a simple pi electron. In other words, when the organic acid ranging from +0.15 to +0.5 in terms of picharge on the hetero atom is employed as treating agent, a drop rate deltasigmas of saturated magnetization sigmas can be halved. By contrast, when the acidity of the organic acid falls below the range, there is no effect on the oxidation resistance and when it exceeds the range, the surface of the ferromagnetic metal particle is destructed, which may cause a degrading of the saturated magnetization. This can reduce aging with excellence in oxidation resistance.
Abstract:
PURPOSE:To allow development with an excellent resolution and gradation characteristic by subjecting coloring agent particles to a surface treatment by a silane coupling agent having an oxyethylene unit and alkyl group. CONSTITUTION:The silane coupling agent having the oxyethylene unit and the alkyl group is acted on the surface of the coloring agent particles, by which a charge imparting agent is taken into the particles even if a resin component is not added thereto. In addition, the developer exhibiting high dispersion stability is obtd. The developer is formed by incorporating a dispersion medium, the coloring agent particles and the charge imparting agent therein. The coloring agent particles 2 are subjected to the surface treatment by the silane coupling agent 1 having the oxyethylene unit 1a and the alkyl group. The interaction on the charge imparting unit is increased by the oxyethylene unit of this silane coupling agent. In addition, the degradation in dispersibility is prevented by the alkyl group. The development by a wet process with the excellent resolution, gradation characteristic and fixability is executed in this way at a high temp. of about 50 to 70 deg.C.
Abstract:
PROBLEM TO BE SOLVED: To impart a high capacitance characteristic or an excellent cycle characteristic to a nonaqueous electrolytic solution secondary battery equipped with a negative electrode comprising a carbonaceous material capable of doping/dedoping light metal ions. SOLUTION: Concerning this nonaqueous electrolytic solution secondary battery equipped with the negative electrode capable of doping/dedoping light metal ions, a positive electrode and the nonaqueous electrolytic solution, the negative electrode is constituted from a material acquired by irradiating a graphitization-retardant carbon material with an electron beam accelerated in high vacuum, in a gaseous atmosphere with an exposure dose over 5 kGy and below 3,000 kGy. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a microstructure, precisely controlling the forming position of cylindrical structure made of carbon or the like. SOLUTION: A cylindrical projecting part 11 is formed on a base plate 10, and then, a catalyst material 20 such as iron is made to adhere to the base plate 10. Subsequently, the base plate 10 is heat-treated to melt the catalyst material 20 and coagulate the same on the side surface 11A of the projecting part 11, thereby forming an annular catalyst pattern made of the catalyst material 20 on the side surface 11A of the projecting part 11. After that, the catalyst pattern is used to cause the growth of the cylindrical structure 30. The cylindrical structure 30 is formed into a carbon (nano) tube raised from the side surface 11A of the projecting part 11 and formed with the tip 30A opened. The cylindrical structure 30 can be formed precisely corresponding to the position of the projecting part 11. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a nitrogen-containing carbon material which can be easily manufactured, has a new structure capable of replacing a capsule body and is applicable to a wide range of use, and its manufacturing method. SOLUTION: The nitrogen-containing carbon material has a structure where nitrogen atom, its ion or its radical structure is added to at least a part of a globular carbon molecule at the inside or the outside of the spherical structure of the globular carbon molecule represented by Cn (wherein n is an integer capable of geometrically forming a globular compound) or a plurality of the globular carbon molecules are combined each other through nitrogen atom, its ion or its radical structure. The method of manufacturing the nitrogen-containing carbon material comprises a process where nitrogen molecule is plasma-excited by a high-frequency plasma in a nitrogen-containing atmosphere to form nitrogen atom radical or its ion, a process where the globular carbon molecule is vaporized, and a process where the nitrogen atom radical or its ion is reacted with the globular carbon molecule. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide magnesium-based nanostructures, and an apparatus and method for synthesis of the magnesium-based nanostructures, that can store hydrogen and release that hydrogen at 150°C or below. SOLUTION: The magnesium-based nanostructures include magnesium having a weight percentage of at least 30% of magnesium with respect to a weight of the nanostructure, and more preferably 50%. The magnesium-based nanostructures may include a protection layer surrounding the magnesium including at least one transition metal. Alternatively, or in addition to the protection layer, the magnesium may be catalytically doped with at least one transition metal. The apparatus and method for producing these magnesium-based nanostructures uses arc-discharge, and the composition of magnesium and the catalysts, or transition metals, may be varied to produce numerous magnesium- based nanostructure combinations, such as doped or coated magnesium-based nanostructures. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method for a nanostructure having a high surface area, manufactured at low cost, and being useful in application of energy and storage of hydrogen. SOLUTION: The carbon nanostructure is formed inside a template material. The carbon nanostructure is derived from a precursor chemically bonded by ion exchange with exchangeable ion of the template and carbonized in the template. The organic body is provided with, at least, a cation center, may be expressed by M x O y C m H n , and M is the cation center including, at least, a single VB element. The embodiment of this invention includes the template of zeolite and mesoporous molecular sieve. After the carbonization of the organic structure in the template, the template is removed to release the sealed carbon nanostructure. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a carbon material and its manufacturing method, which efficiently occludes hydrogen, is light in weight, repeatedly used and safe, and does not cause a problem in resource and environment, a hydrogen occluding carbon material and its manufacturing method, and a cell and a fuel cell, both of which use the hydrogen occluding carbon material. SOLUTION: The carbon material for hydrogen occlusion is manufactured by orientating crystal axis of a high anisotropy carbon material, the hydrogen occluding carbon material manufactured by occluding hydrogen in the obtained carbon material, and the cell and the fuel cell manufactured by using the obtained hydrogen occluding carbon material.