JFE MINERAL COMPANY, LTD. Patent applications |
Patent application number | Title | Published |
20120204681 | MOLYBDENUM REFINING METHOD - A molybdenum refining method collects molybdenum with high purity and yield by simple means. The molybdenum refining method includes mixing and grinding a molybdenum ore or concentrate containing molybdenum sulfide, an oxidizing agent, and an alkali or alkaline earth metal salt to produce an alkali or alkaline earth metal salt of molybdic acid from molybdenum sulfide. | 08-16-2012 |
20120043494 | PIEZOELECTRIC SINGLE CRYSTAL INGOT, PRODUCING METHOD THEREFOR AND PIEZOELECTRIC SINGLE CRYSTAL DEVICE - A piezoelectric single crystal ingot is produced by the Bridgman method and contains a relaxor having a composition of Pb(Mg, Nb)O | 02-23-2012 |
20110305890 | FERRITE MATERIAL HAVING COMPOSITION GRADIENT FOR MEASURING MAGNETO-OPTICAL-EFFECT PROPERTIES AND METHOD FOR EVALUATING PROPERTIES OF FERRITE - Provided is a method of evaluating properties of ferrite which can continuously measure change in magnetic properties accompanying change in composition of the ferrite merely by preparing one specimen. | 12-15-2011 |
20110081549 | AIN BULK SINGLE CRYSTAL, SEMICONDUCTOR DEVICE USING THE SAME AND METHOD FOR PRODUCING THE SAME - An object of the present invention is to provide, even when a single crystal of a material other than AlN is used as a crystal, an AlN bulk single crystal having fewer defects and high quality, a method for producing such an AlN bulk single crystal, and a semiconductor device. A feature is to select, as a surface | 04-07-2011 |
20100109489 | PIEZOELECTRIC SINGLE CRYSTAL DEVICE - In a piezoelectric device that uses a vibration mode in a direction parallel to a polarization direction, a single crystal device that achieves an electromechanical coupling factor of 65% or more, which is more than the electromechanical coupling factor (about 60%) of the existing flat plane type piezoelectric single crystal device in that vibrational direction, is provided by performing certain treatment to its device plane. Specifically, a piezoelectric portion having a comb-shaped structure in which a plurality of slits are formed with a certain arrangement pitch on either of device planes whose polarization direction is their normal direction, the slits having a depth extending in a direction substantially perpendicular to the device plane and being filled with an insulating material, is formed to achieve 65% or more of an electromechanical coupling factor in a direction parallel to the polarization direction. | 05-06-2010 |
20100108941 | METHOD FOR PRODUCING CARBIDE OF TRANSITION METAL AND/OR COMPOSITE CARBIDE OF TRANSITION METAL - To simultaneously overcome a drawback in that proceeding of a solid phase carbonization reaction requires high temperature and a drawback in that the reaction requires use of expensive materials. A method for producing a carbide of a Group IVA, VA, or VIA transition metal in the periodic table and/or a composite carbide of the transition metal and iron, the method including the step of co-milling a ferroalloy containing a Group IVA, VA, or VIA transition metal in the periodic table and incidental impurities and a carbon material mainly composed of carbon in a vacuum or an atmosphere of an inert gas to effect a solid phase reaction between the ferroalloy and the carbon material. | 05-06-2010 |
20090212667 | Piezoelectric single crystal device and fabrication method thereof - The present invention provides a piezoelectric single crystal device excellent in heat resistance and capable of stably maintaining the electromechanical coupling factor k | 08-27-2009 |
20090139372 | Production method of pure metal/alloy super-micro powder - It is to propose a method of producing super-micro powders of pure metal-alloy in which cheap materials can be used and the production is efficient. In the production method of pure metal super-micro powder by heating a starting material containing a metal chloride and reducing the resulting vapor of the metal chloride with hydrogen gas, an elementary metal constituting the metal chloride is added to the starting material containing the metal chloride and a metal chloride having a large valence among metal chlorides having two or more valence is used as the metal chloride. Also, in the production method of alloy super-micro powder, a metal chloride is used as one to (number of all alloying components—1) alloying components in the starting material and an elemental metal is used as the other alloying component. | 06-04-2009 |
20080237548 | Ultrafine metal powder slurry - In an ultrafine metal powder slurry containing an organic solvent, a surfactant, and an ultrafine metal powder, the surfactant is oleoyl sarcosine, the content of the ultrafine metal powder in the ultrafine metal powder slurry is 70 to 95 percent by mass, and more than 0.05 to less than 2.0 parts by mass of the surfactant is contained relative to 100 parts by mass of the ultrafine metal powder. By the above slurry, reduction in labor and treatment time can be realized in a conductive paste forming process. In addition, since aggregation of particles of the ultrafine metal powder is prevented, an ultrafine metal powder slurry can be provided having superior dispersibility and dry film density. | 10-02-2008 |