TODA KOGYO CORP.
|TODA KOGYO CORP. Patent applications|
|Patent application number||Title||Published|
|20140266525||R-T-B-BASED RARE EARTH MAGNET PARTICLES, PROCESS FOR PRODUCING THE R-T-B-BASED RARE EARTH MAGNET PARTICLES, AND BONDED MAGNET - An object of the present invention is to enhance a coercive force of magnetic particles by promoting formation of a continuous R-rich grain boundary phase in a crystal grain boundary of a magnetic phase of the particles, and to thereby obtain R-T-B-based rare earth magnet particles further having a high residual magnetic flux density. The present invention relates to production of R-T-B-based rare earth magnet particles capable of exhibiting a high coercive force even when a content of Al therein is reduced, and a high residual magnetic flux density, in which formation of an R-rich grain boundary phase therein can be promoted by heat-treating Al-containing R-T-B-based rare earth magnet particles obtained by HDDR treatment in vacuum or in an Ar atmosphere at a temperature of not lower than 670° C. and not higher than 820° C. for a period of not less than 30 min and not more than 300 min.||09-18-2014|
|20140248493||SPHERICAL CARBON MATERIAL AND PROCESS FOR PRODUCING THE SPHERICAL CARBON MATERIAL - The present invention provides a spherical carbon material in the form of isotropic particles which undergoes a considerably less change in shape even after subjected to carbonization or graphitization, and has a good crystal growth property. The present invention relates to a raw coke spherical carbon material in which an average of a plane-direction sphericity and an elevation-direction sphericity of particles of the spherical carbon material as measured in plane and elevation directions of particles of the spherical carbon material, respectively, by observation using a scanning electron microscope is not less than 60%, and a shape retention rate of the spherical carbon material after being heated at 1200° C. for 5 hr and then at 2800° C. for 3 hr is not less than 70%; a process for producing the above raw coke spherical carbon material, comprising the step of applying a compression shear stress to raw coke particles comprising particles having a particle diameter that is not more than 1/3 of an average particle diameter (D50) thereof in an amount of not less than 5% to subject the raw coke particles to dry granulation sphericalization treatment; a carbonaceous spherical carbon material obtained by carbonizing the above raw coke spherical carbon material and a process for producing the carbonaceous spherical carbon material; and a graphite spherical carbon material obtained by graphitizing the above raw coke spherical carbon material and a process for producing the graphite spherical carbon material.||09-04-2014|
|20130265128||R-T-B-BASED RARE EARTH MAGNET PARTICLES, PROCESS FOR PRODUCING THE R-T-B- BASED RARE EARTH MAGNET PARTICLES, AND BONDED MAGNET - R-T-B-based rare earth magnet particles are produced by an HDDR treatment which comprises a first stage HD step of heating particles of a raw material alloy having a composition of R, B and Co in an inert atmosphere or in a vacuum atmosphere and then replacing the atmosphere with a hydrogen-containing gas atmosphere in which the raw material alloy particles are held in the same temperature range and a second stage HD step of heating a material obtained in the first stage HD step in which the material is held in the hydrogen-containing gas atmosphere.||10-10-2013|
|20130251621||METHOD OF PRODUCING AMORPHOUS CARBON MATERIAL FOR THE NEGATIVE ELECTRODE OF LITHIUM ION SECONDARY BATTER, AND LITHIUM ION SECONDARY BATTERY - An amorphous carbon material for lithium-ion secondary battery negative electrode is capable of reducing capacity degradation due to repeated charge and discharge cycles, storage while being charged, or floating charge.||09-26-2013|
|20120164320||MANUFACTURING METHOD OF SOFT MAGNETIC MATERIAL AND MANUFACTURING METHOD OF DUST CORE - A manufacturing method of a soft magnetic material has a step of preparing a metal magnetic particle containing iron as the main component, and a step of forming an insulating film surrounding the surface of the metal magnetic particle. The step of forming the insulating film includes a step of mixing and stirring the metal magnetic particle, aluminum alkoxide, silicon alkoxide, and phosphoric acid.||06-28-2012|
|20110227796||CERAMIC POWDER, DIELECTRIC COMPOSITE MATERIAL CONTAINING THE CERAMIC POWDER, AND DIELECTRIC ANTENNA - Ceramic powder having a BET specific surface area within a range of from 0.1 to 2.0 m||09-22-2011|
|20100255188||SOFT MAGNETIC MATERIAL, POWDER MAGNETIC CORE AND METHOD OF MANUFACTURING SOFT MAGNETIC MATERIAL - A soft magnetic material is a soft magnetic material including a composite magnetic particle (||10-07-2010|
|20100193972||SPHERICAL SINTERED FERRITE PARTICLES, RESIN COMPOSITION FOR SEMICONDUCTOR ENCAPSULATION COMPRISING THEM AND SEMICONDUCTOR DEVICES PRODUCED BY USING THE SAME - A resin composition for semiconductor encapsulation having good moldability, of which the cured product has effective electromagnetic wave shieldability, is provided. A resin composition for semiconductor encapsulation, containing spherical sintered ferrite particles having the following properties (a) to (c) : (a) the soluble ion content of the particles is at most 5 ppm; (b) the mean particle size of the particles is from 10 to 50 μm; (c) the crystal structure of the particles by X-ray diffractiometry is a spinel structure.||08-05-2010|
|20090260730||GAS GENERANT COMPOSITION FOR GAS ACTUATOR FOR ACTIVATING SAFETY DEVICE AND GAS GENERATOR FOR GAS ACTUATOR USING THE SAME - Disclosed is a gas generant composition for a gas actuator used for activating a safety device, which contains (A) a nitrogen-containing organic compound, (B) a metal nitrate and/or a perchlorate, (C) a water-soluble polymer binder, and (D) a magnetic material. When compared with the conventional gas generant compositions, this gas generant composition is excellent in combustibility under low pressure conditions and reduced in CO gas generation during combustion. In this gas generant composition, (D) the magnetic material is preferably composed of a magnetic iron oxide. It is also preferable that (A) the nitrogen-containing organic compound is composed of one or more substances selected from nitroguanidine, guanidine nitrate, bitetrazole, azobistetrazole and 5-aminotetrazole; (B) the metal nitrate is composed of a metal salt selected from alkali metals and alkaline earth metals, while the perchlorate is composed of ammonium perchlorate or potassium perchlorate; (C) the water-soluble polymer binder is composed of a mixture of hydroxypropyl methylcellulose (HPMC) and a polyacrylamide; and (D) the magnetic iron oxide has a spinel crystal structure.||10-22-2009|
|20090047519||SOFT MAGNETIC MATERIAL, DUST MAGNETIC CORE, PROCESS FOR PRODUCING SOFT MAGNETIC MATERIAL AND PROCESS FOR PRODUCING DUST MAGNETIC CORE - The soft magnetic material includes a plurality of composite magnetic particles having a metal magnetic particle and an insulating film surrounding the surface of the metal magnetic particle. The metal magnetic particle contains iron as the main component. The insulating film contains aluminum, silicon, phosphorus, and oxygen. The insulating film satisfies the relationship 0.4≦M||02-19-2009|
Patent applications by TODA KOGYO CORP.