| NIPPON TUNGSTEN CO., LTD. Patent applications |
| Patent application number | Title | Published |
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| 20120091922 | TUNGSTEN CATHODE MATERIAL - A tungsten cathode material to be used for TIG welding, plasma spraying, plasma cutting, electro-discharge machining, discharge lamps, and the like is improved; use of the radioactive element thorium is reduced; and a long life and a high performance are realized. In a tungsten cathode material, oxide particles containing an oxide or oxides of at least one selected from the group consisting of Sm, Nd, Gd, and La in a total amount of 50 vol % or more are dispersed, the oxide particles having an average particle diameter d satisfying the relationship 0| 04-19-2012 | |
| 20110174125 | METHOD OF SHEARING THIN PLATE - Provided is a method of shearing a thin plate with high quality without a need for narrowing a clearance by precision machining. The method comprises: placing a thin plate ( | 07-21-2011 |
| 20110160034 | Titanium carbide powder and titanium carbide-ceramics composite powder and method for production thereof, and sintered compact from the titanium carbide powder and sintered compact from the titanium carbide/ ceramics composite powders and method for production thereof - Disclosed is a highly-pure fine titanium carbide powder having a maximum particle size of 100 nm or less and containing metals except titanium in an amount of 0.05 wt % or less and free carbon in an amount of 0.5 wt % or less. The powder has a NaCl-type crystal structure, and a composition represented by TiCxOyNz, wherein X, Y and Z satisfy the relations: 0.5≦X≦1.0; 0≦Y≦0.3; 0≦Z≦0.2; and 0.5≦X+Y+Z≦1.0.) The powder is produced by: dissolving an organic substance serving as a carbon source in a solvent to prepare a liquid, wherein the organic substance contains at least one OH or COOH group which is a functional group coordinatable to titanium of titanium alkoxide, and no element except C, H, N and O; mixing titanium alkoxide with the liquid to satisfy the following relation: 0.7≦α≦1.0 (wherein α is a molar ratio of the carbon source to the titanium alkoxide), so as to obtain a precursor solution; and subjecting a product in the precursor solution to a heat treatment in a non-oxidizing atmosphere or a vacuum atmosphere at a temperature of 1050 to 1500° C. The present invention can provide fine titanium carbide powders with nano-scale particle sizes, which are free of inorganic impurities, such as titanium oxide and metal, low in free carbon, and effective in enhancing characteristics of a titanium carbide-ceramics composite sintered body. | 06-30-2011 |
| 20100294657 | POLYCRYSTALLINE MgO SINTERED BODY, PRODUCTION METHOD THEREFOR, AND MgO SPUTTERING TARGET - Provided is a polycrystal MgO sintered body which is capable of having a sintered density close to a theoretical density thereof, and exhibiting excellent mechanical properties and heat conductivity, while reducing contamination of an atmosphere due to gas generation, and a production method for the sintered body. The polycrystal MgO sintered body has a unique crystalline anisotropy in which (111) faces are oriented along a surface applied with a uniaxial pressure at a high rate. The polycrystalline MgO sintered body is obtained by a method which comprises the steps of: sintering an MgO raw material powder having a particle size of 1 μm or less, under a uniaxial pressure; and then subjecting the sintered powder to a heat treatment under an atmosphere containing 0.05 volume % or more of oxygen, at a temperature of 1273 K or more for 1 minute or more. | 11-25-2010 |
| 20100193478 | Electrode for spot welding - Provided is an electrode ( | 08-05-2010 |
| 20100143749 | SUBSTRATE MATERIAL FOR MAGNETIC HEAD AND METHOD FOR MANUFACTURING THE SAME - Disclosed is a substrate material for an AlTiC-based magnetic head, which is excellent in ultra-low flying-related properties as a material for a magnetic head, such as a TPC or AAB type for use as a thin-film magnetic head slider for HDD devices and a thin-film magnetic head for tape recording devices, where a flying height between a magnetic head element and a recording medium is extremely reduced, and usable in perpendicular recording heads, HAMR heads or the like. The magnetic head substrate material consists of a sintered body which contains 10 to 50 mass % of TiC | 06-10-2010 |
| 20090120155 | Shaping Tool and Methods of Using the Same - Disclosed are a shaping tool and a method of using the shaping tool, capable of applying a sufficient compressive stress to a shaping member to prevent an excessively high tensile stress from being imposed on the shaping member so as to achieve an extended usable life even if the shaping member is made of a hard and brittle material. The shaping tool comprises a shaping member, a pressure-applying member surroundingly fitted onto the shaping member, a collet chuck surroundingly fitted onto the pressure-applying member, and a casing surroundingly fitted onto the collet chuck. The pressure-applying member has a plurality of outer peripheral slits and a plurality of inner peripheral slits, which are circumferentially arranged in alternate relation and at even intervals. The collet chuck has an externally-threaded portion at an upper or lower end thereof, and a taper surface formed in an outer peripheral surface thereof to have a diameter which gradually decreases toward the externally-threaded portion. The casing has an inner peripheral surface formed as a taper surface in surface contact with the taper surface. The collet chuck is adapted to be reduced in diameter by fastening a nut disposed above or below the casing to the externally-threaded portion, so as to apply a compressive stress to the shaping member. | 05-14-2009 |
| 20090068498 | MATERIAL OF CERAMIC SUBSTRATE FOR THIN-FILM MAGNETIC HEAD - A ceramic substrate material has good thermal conductivity and machinability, which are high enough to apply it to thin-film magnetic heads, and low particle generation. A ceramic substrate material for a thin-film magnetic head includes 25 vol % to 70 vol % of WC and the balance consisting essentially of Al | 03-12-2009 |
