Patent application number | Description | Published |
20090035170 | R-T-B TYPE ALLOY AND PRODUCTION METHOD THEREOF, FINE POWDER FOR R-T-B TYPE RARE EARTH PERMANENT MAGNET, AND R-T-B TYPE RARE EARTH PERMANENT MAGNET - An object of the present invention is to provide an R-T-B type alloy (wherein R is at least one element selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb, and Lu; T is a transition metal that contains 80% by mass or more of Fe; and B is one that contains 50% by mass or more of boron (B) and also contains at least one element of C and N within a range from 0 to less than 50% by mass) that contains at least Dy, as a raw material for a rare earth-based permanent magnet having excellent magnetic characteristics, and the R-T-B type alloy provided in the present invention includes a main phase such as an R | 02-05-2009 |
20090072938 | R-T-B SYSTEM ALLOY AND METHOD OF PREPARING R-T-B SYSTEM ALLOY, FINE POWDER FOR R-T-B SYSTEM RARE EARTH PERMANENT MAGNET, AND R-T-B SYSTEM RARE EARTH PERMANENT MAGNET - The present invention provides an R-T-B system alloy used as a raw material for a rare earth permanent magnet (wherein R represents at least one selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb and Lu, T represents a transition metal comprising 80% or more by weight of Fe, and B represents a component comprising 50% or more by weight of B and between 0 to less than 50% by weight of at least one selected from the group consisting of C and N), wherein the content of Mn in the alloy is 0.05% or less by weight. | 03-19-2009 |
20100202917 | APPARATUS FOR PRODUCING ALLOY - The object of the present invention is to provide a production apparatus which can produce an alloy which can produce a rare-earth magnet having high coercive force, and the present invention provide an apparatus for producing an alloy, wherein the device includes at least a casting device | 08-12-2010 |
20100230013 | R-T-B ALLOY, PROCESS FOR PRODUCTION OF R-T-B ALLOY, FINE POWDER FOR R-T-B RARE EARTH PERMANENT MAGNETS, AND R-T-B RARE EARTH PERMANENT MAGNET - An R-T-B alloy used in a rare earth permanent magnet, where R is at least one element selected from rare earth elements including Y, which contains Dy and/or Tb as an essential element, T is a metal comprising Fe as an essential element, and B is boron, comprising: a main phase being an R | 09-16-2010 |
20110048590 | PRODUCTION METHOD OF THERMOELECTRIC SEMICONDUCTOR ALLOY, THERMOELECTRIC CONVERSION MODULE AND THERMOELECTRIC POWER GENERATING DEVICE - The present invention provides a method for producing a half Heuslar alloy including quench-solidifying a molten alloy at a cooling rate of 1×10 | 03-03-2011 |
20110260565 | ALLOY MATERIAL FOR R-T- B SYSTEM RARE EARTH PERMANENT MAGNET, METHOD FOR PRODUCTION OF R-T-B SYSTEM RARE EARTH PERMANENT MAGNET, AND MOTOR - An alloy material for an R-T-B based rare earth permanent magnet of the present invention includes: an R-T-B based alloy that comprises R, T, and B (wherein R represents at least one selected from the group consisting of Nd, Pr, Dy, and Tb, with Dy or Tb being essentially contained at 4% by mass to 10% by mass in the R-T-B type alloy; T represents a transition metal which essentially contains Fe; and B represents boron, a part of which can be substituted by carbon or nitrogen); and a high melting point compound having a melting point of 1080° C. or higher. | 10-27-2011 |
20110265919 | Process for producing thermoelectric semiconductor alloy, thermoelectric conversion module, thermoelectric power generating device, rare earth alloy, producing process thereof, thermoelectric conversion material, and thermoelectric conversion system using filled skutterudite based alloy - A process for producing a rare earth alloy comprises heating a raw material alloy to be a molten alloy, and quench-solidifying the molten alloy, wherein the raw material alloy is compounded so as to have a composition represented by the formula: RE | 11-03-2011 |
20120091844 | ALLOY MATERIAL FOR R-T-B TYPE RARE EARTH PERMANENT MAGNET, METHOD FOR PRODUCING R-T-B TYPE RARE EARTH PERMANENT MAGNET, AND MOTOR - An excellent R-T-B type rare earth permanent magnet having a high coercive force (Hcj), in which a decrease in magnetization (Br) is suppressed, is obtained by a method for producing an R-T-B type rare earth permanent magnet using, as a raw material, an R-T-B type rare earth magnet alloy material including an R-T-B type alloy (wherein R is one kind, or two or more kinds selected from Nd, Pr, Dy and Tb, 4% by mass to 10% by mass of Dy or Tb being essentially contained in the R-T-B type alloy, T is metal containing essentially Fe, and B is boron) and a metal powder. | 04-19-2012 |
20130092868 | R-T-B-BASED RARE EARTH PERMANENT MAGNET, MOTOR, AUTOMOBILE, POWER GENERATOR, AND WIND POWER-GENERATING APPARATUS - An R-T-B-based rare earth permanent magnet including a sintered compact having a main phase mainly including R | 04-18-2013 |
20130099150 | R-T-B-BASED RARE EARTH PERMANENT MAGNET, MOTOR, AUTOMOBILE, POWER GENERATOR, AND WIND POWER-GENERATING APPARATUS - An R-T-B-based rare earth permanent magnet including a sintered body which is provided with a main phase mainly containing R | 04-25-2013 |
20130154424 | ALLOY MATERIAL FOR R-T-B-BASED RARE EARTH PERMANENT MAGNET, METHOD FOR PRODUCING R-T-B-BASED RARE EARTH PERMANENT MAGNET, AND MOTOR - An alloy material for an R-T-B-based rare earth permanent magnet, including (i) an R-T-B-based alloy composed of R being two or more members selected from rare earth elements, T being a transition metal that essentially contains Fe, B and unavoidable impurities, and in which the Dy content is more than 10% by mass and less than 31% by mass, and (ii) a metal powder. Also disclosed is a method for producing an R-T-B-based rare earth permanent magnet and a motor provided with the R-T-B-based rare earth permanent magnet. | 06-20-2013 |
20130264903 | ALLOY MATERIAL FOR R-T-B SYSTEM RARE EARTH PERMANENT MAGNET, METHOD FOR PRODUCING R-T-B SYSTEM RARE EARTH PERMANENT MAGNET, AND MOTOR - An alloy material for an R-T-B system rare earth permanent magnet having a high orientation rate and high coercivity (Hcj), and a method for producing an R-T-B system rare earth permanent magnet using the alloy material. The alloy material includes a plurality of R-T-B system alloys having different compositions and a metal powder. The respective R-T-B system alloys are formed of R which is composed of two or more kinds selected from rare earth elements, T which is composed of a transition metal essentially containing Fe, B, and unavoidable impurities. A first alloy having the greatest Dy content contains 17 mass % or greater of Dy, and a Dy concentration difference between the first alloy and a second alloy having the smallest Dy concentration difference with respect to the first alloy among the plurality of R-T-B system alloys is 5 mass % or greater. | 10-10-2013 |
20140132377 | ALLOY FOR R-T-B-BASED RARE EARTH SINTERED MAGNET, PROCESS OF PRODUCING ALLOY FOR R-T-B-BASED RARE EARTH SINTERED MAGNET, ALLOY MATERIAL FOR R-T-B-BASED RARE EARTH SINTERED MAGNET, R-T-B-BASED RARE EARTH SINTERED MAGNET, PROCESS OF PRODUCING R-T-B-BASED RARE EARTH SINTERED MAGNET, AND MOTOR - An alloy for R-T-B-based rare earth sintered magnets which contains R which is a rare earth element; T which is a transition metal essentially containing Fe; a metallic element M containing one or more metals selected from Al, Ga and Cu; B and inevitable impurities, in which R accounts for 13 at % to 15 at %, B accounts for 4.5 at % to 6.2 at %, M accounts for 0.1 at % to 2.4 at %, T accounts for balance, a proportion of Dy in all rare earth elements is in a range of 0 at % to 65 at %, and the following Formula 1 is satisfied, | 05-15-2014 |
20140191831 | R-T-B RARE EARTH SINTERED MAGNET, ALLOY FOR R-T-B RARE EARTH SINTERED MAGNET, AND METHOD OF MANUFACTURING THE SAME - An R-T-B rare earth sintered magnet contains R which represents a rare earth element; T which represents a transition metal essentially containing Fe; a metal element M which represents Al and/or Ga; B; Cu; and inevitable impurities the R-T-B rare earth sintered magnet including 13.4 to 17 at % of R, 4.5 to 5.5 at % of B, and 0.1 to 2.0 at % of M, and T as the balance; in which the R-T-B rare earth sintered magnet is formed of a sintered body which includes a main phase composed of R | 07-10-2014 |
20140314612 | R-T-B RARE EARTH SINTERED MAGNET AND METHOD OF MANUFACTURING THE SAME - A method of manufacturing an R-T-B rare earth sintered magnet includes a process of disposing and sintering a compact of a first alloy powder and an alloy material of a second alloy in a chamber of a sintering furnace. The first alloy consists of R which represents a rare earth element, T which represents a transition metal essentially containing Fe, a metal element M which represents Al and/or Ga, B, Cu, and inevitable impurities. The first alloy contains 11 at % to 17 at % of R, 4.5 at % to 6 at % of B, 0 at % to 1.6 at % of M, and T as the balance, and Dy content in all of the rare earth elements is 0 at % to 29 at %. The second alloy consists of R which represents a rare earth element, T which represents a transition metal essentially containing Fe, a metal element M which represents Al and/or Ga, B, Cu, and inevitable impurities. The second alloy contains 11 at % to 20 at % of R, 4.5 at % to 6 at % of B, and 0 at % to 1.6 at % of M, and T as the balance, and Dy content in all of the rare earth elements is 0 at % to 29 at %. | 10-23-2014 |