Abstract:
A negative electrode material for a non-aqueous electrolyte secondary battery comprising an alloy including silicon and a transition metal selected from the group consisting of titanium, zirconium, vanadium, molybdenum, tungsten, iron, and nickel; and a silicon oxide film and an oxide film of the transition metal formed on a surface of the alloy wherein the alloy includes an A phase including silicon and a B phase including a crystalline alloy of silicon and the transition metal. The negative electrode material has a silicon oxide film and an oxide film of the transition metal on the surface of the alloy wherein the thickness ratio of the transition metal oxide film to the silicon oxide film is at least 0.44 and smaller than 1.
Abstract:
A flat soft magnetic metal powder is provided that includes: Ni in the range of 60 to 90 mass %, one or more kinds of Nb, V, and Ta in the range of 0.05 to 20 mass % in total (0.05 to 19.95 mass % when Mo is added thereto), Mo in the range of 0.05 to 10 mass % if necessary, one or two kinds of Al and Mn in the range of 0.01 to 1 mass % in total if necessary, and the balance including Fe; an average grain size of 30 to 150 μm and an aspect ratio (average grain size/average thickness) of 5 to 500; and a flat face. Here, with a peak intensity of a face index (220) in an X-ray diffraction pattern I220 and a peak intensity of a face index (111) I111, a peak intensity ratio I220/I111 is in the range of 0.1 to 10.
Abstract:
Glycerol is used as a solvent medium for the precipitation of a complex of nickel and glycerol material. The precipitate is separated from the liquid solvent and dried and calcined in air to produce small (nanometer size) particles characterized by a nickel core encased in a nickel oxide shell. The proportions of nickel core and nickel oxide shell can be controlled by management of the time and temperature of heating in air. Prolonged heating in air can produce nickel oxide particles, or calcining of the precipitate in nitrogen produces nickel particles.
Abstract:
The object of the present invention is provide a metal nanoparticle which has a nano-sized average diameter while being highly stable as a particle, and a method for producing such metal nanoparticle. Particularly provides a metal nanoparticle having characteristics such as particle diameter and particle size distribution suitable for forming a conductive coating layer, and a method for producing such metal nanoparticle. The metal nanoparticle of the present invention is characterized in that it is obtained by reacting a reducing agent act on a solution containing an organic acid metal salt and an amine.
Abstract:
There is provided nanometer-size spherical particles. The particles of the present invention are made of at least one selected from the group consisting of a metal, an alloy, and a metal compound. The particles include one or both of a polycrystalline region and a single-crystalline region. The particles have a particle size of less than 1 μm; and a sphericity of −10% to +10%.
Abstract:
A direct manufacturing technique involving rapid solidification processing uses a reaction between a metallic molten pool and a reactant gas in an inert atmosphere to form alloys with improved desired properties. By utilizing rapid solidification techniques, solubility levels are increased resulting in alloys with unique mechanical and physical properties. Laser deposition of alloys in atmospheres of varying reactant content produce compositions with intermingled and significantly improved overall properties.
Abstract:
A ferromagnetic metal powder for a magnetic recording medium that combines good magnetic properties and oxidation stability, and a magnetic recording medium using the powder. A method of producing the magnetic powder comprises using oxygen to form an oxide film, then changing the state of the oxide film by using moderate gas phase activation treatment in an active gas, using, for example, CO or H2 or other such gas having reducing properties. ESCA-based measurements show that the binding energy peak of the powder is more to the low energy side compared to when the above treatment is not used, showing that the oxide film has oxidation resistance. The storage stability of a magnetic recording medium is improved by using the powder.
Abstract translation:用于磁记录介质的强磁性金属粉末,其具有良好的磁特性和氧化稳定性,以及使用该粉末的磁记录介质。 制造磁性粉末的方法包括使用氧气形成氧化膜,然后通过使用例如CO或H 2 O 2的活性气体中的中等气相活化处理来改变氧化膜的状态, 或其它具有还原性能的气体。 基于ESCA的测量显示,与不使用上述处理相比,粉末的结合能峰值更高于低能量侧,表明氧化膜具有抗氧化性。 磁粉记录介质的储存稳定性得到改善。
Abstract:
The present invention refers to a process for production of a powder of niobium and/or tantalum having high purity, large specific surface area, controlled contents of oxygen and nitrogen, and a morphology that is adequate for use in the manufacture of capacitors, characterized by including one sole step of reduction of a controlled layer of niobium and/or tantalum oxide (NbxOy, and/or TaxOy, where x=1 to 2 and y=1 to 5) deliberately formed over particles of metallic niobium and/or tantalum and/or hydrides thereof of adequate purity, by alkali metals or earth alkali metals and/or hydrides thereof in a bath of molten salts followed by a step of dissolution of the salt in an aqueous solution for recovery of the niobium and/or tantalum powder. These particles produced using the said process have a small size, large surface area and a sponge-like morphology, being thereby adequate for the production of capacitors.
Abstract translation:本发明涉及一种生产具有高纯度,大比表面积,受控含氧量和氮含量的铌和/或钽粉末的方法,以及足以用于制造电容器的形态,其特征在于: 包括在金属铌和/或钽的颗粒上故意形成的铌和/或氧化钽(Nb x O y和/或TaxO y,其中x = 1至2和y = 1至5)受控层的还原的唯一步骤, 碱金属或碱土金属和/或其氢化物在熔盐浴中浸渍,然后将盐溶解在用于回收铌和/或钽粉末的水溶液中的步骤。 使用所述方法制造的这些颗粒具有小尺寸,大的表面积和海绵状形态,从而足以用于制造电容器。
Abstract:
A method of producing an FeCrAl material by gas atomization, wherein in addition to containing iron (Fe), chromium (Cr) and aluminium (Al) the material also contains minor fractions of one or more of the materials molybdenum (Mo), hafnium (Hf), zirconium (Zr), yttrium (Y), nitrogen (N), carbon (C) and oxygen (O). The invention is characterized by causing the smelt to be atomized to contain 0.05-0.50 percent by weight tantalum (Ta) and, at the same time, less than 0.10 percent by weight titanium (Ti). According to one highly preferred embodiment, nitrogen gas (N2) is used as an atomizing gas to which a given amount of oxygen gas (O2) is added, said amount of oxygen gas being such as to cause the atomized powder to contain 0.02-0.10 percent by weight oxygen (O) at the same time as the nitrogen content of the powder is 0.01-0.06 percent by weight. The invention also relates to a high temperature material.
Abstract:
The invention discloses a neodymium-iron-boron magnet and a preparation method thereof. The neodymium-iron-boron magnet comprises a main phase crystal grain, a shell layer of the main phase crystal grain and a Nd-rich phase adjacent to the main phase crystal grain, wherein the main phase crystal grain comprises Nd2Fe14B; or the main phase crystal grain comprises Nd2Fe14B and Pr2Fe14B; the shell layer comprises (Nd/Dy)2Fe14B and/or (Nd/Tb)2Fe14B; the shell layer has a thickness of 0.1-6 μm; the Nd-rich phase comprises a R6Fe13B phase, wherein the R is one or more selected from the group consisting of Nd, Pr, Dy and Tb. The method of the invention effectively reduces the diffusion amount of the heavy rare earth elements into the main phase, forms a thinner heavy rare earth shell layer, and can further optimize and improve the high temperature performance of the magnet.