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| Number | Title | Issue Date |
| 8182618 | Rare earth sintered magnet and method for producing same A sintered rare-earth magnet includes an Nd2Fe14B type crystalline phase as its main phase and Al as an additive. The magnet includes at least one light rare-earth element LR selected from the group consisting of yttrium and the rare-earth elem... | 05/22/2012 |
| 8182619 | R-F e-B rare-earth sintered magnet and process for producing the same First, an R—Fe—B based rare-earth sintered magnet body including, as a main phase, crystal grains of an R2Fe14B type compound that includes a light rare-earth element RL, which is at least one of Nd and Pr, as a major rare-earth element R i... | 05/22/2012 |
| 8177922 | R-Fe-B anisotropic sintered magnet An R—Fe—B based anisotropic sintered magnet according to the present invention has, as a main phase, an R2Fe14B type compound that includes a light rare-earth element RL (which is at least one of Nd and Pr) as a major rare-earth element R, ... | 05/15/2012 |
| 8177921 | R-Fe-B rare earth sintered magnet An R—Fe—B based rare-earth sintered magnet according to the present invention includes, as a main phase, crystal grains of an R2Fe14B type compound that includes Nd, which is a light rare-earth element, as a major rare-earth element R. The ... | 05/15/2012 |
| 8163106 | R-Fe-B based sintered magnet having on the surface thereof vapor deposited film of aluminum or alloy thereof, and method for producing the same An R—Fe—B sinlered magnet having on the surface thereof a vapor deposited film of aluminum or an alloy thereof and a method for producing the same. The vapor deposited film of aluminum or an alloy thereof comprises a columnar crystalline structure grown broader ... | 04/24/2012 |
| 8152936 | Rare earth magnet There is provided a rare earth magnet with excellent Br and HcJ values. The rare earth magnet according to a preferred embodiment of the invention is characterized by being composed mainly of R (where R is at least one element selected from among rare earth elements... | 04/10/2012 |
| 8142573 | R-T-B sintered magnet and method for producing the same An R-T-B based sintered magnet includes both a light rare-earth element RL (which is at least one of Nd and Pr) and a heavy rare-earth element RH (which is at least one of Dy and Tb) and Nd2Fe14B type crystals as a main ph... | 03/27/2012 |
| 8105446 | Process for producing alloy slab for rare-earth sintered magnet, alloy slab for rare-earth sintered magnet and rare-earth sintered magnet Disclosed are a method for producing alloy flakes for rare earth sintered magnets, which makes uniform the intervals, size, orientation, and shape of the R-rich region and the dendrites of the 2-14-1 phase, and alloy flakes for a rare earth sintered magnet obtained ... | 01/31/2012 |
| 8092619 | R-T-Cu-Mn-B type sintered magnet An R-T-Cu—Mn—B based sintered magnet includes: 12.0 at % to 15.0 at % of R, which is at least one of the rare-earth elements that include Y and of which at least 50 at % is Pr and/or Nd; 5.5 at % to 6.5 at % of B; 0.08 at % to 0.35 at % of Cu; 0.04 at % to less ... | 01/10/2012 |
| 8012269 | Nd-Fe-B rare earth permanent magnet material A rare earth permanent magnet material is based on an R—Fe—Co—B—Al—Cu system wherein R is at least one element selected from Nd, Pr, Dy, Tb, and Ho, 15 to 33% by weight of Nd being contained. At least two compounds selected from M-B, M-B—Cu and M-C compo... | 09/06/2011 |
| 8002906 | Rare earth magnet and production process thereof The present invention provides a rare earth magnet, which is formed through at least hot molding, the rare earth magnet containing grains including an R2X14B phase as a main phase, and a grain boundary phase surrounding peripheries of the grain... | 08/23/2011 |
| 7988797 | Nano-composite magnet, quenched alloy for nano-composite magnet, and method for producing them and method for distinguishing them A nanocomposite magnet according to the present invention has a composition represented by the general formula: RxQyMz(Fe1-mTm)bal, where R is at least one rare-earth element, Q is at least one elemen... | 08/02/2011 |
| 7972450 | High resistance magnet and motor using the same A magnet comprising grains of a ferromagnetic material whose main component is iron and a fluorine compound layer or an oxy-fluorine compound layer of fluoride compound particles of alkali metals, alkaline earth metals and rare earth elements, present on the surface... | 07/05/2011 |
| 7892365 | Rare earth element-iron-boron alloy, and magnetically anisotropic permanent magnet powder and method for production thereof A method of making a magnetically anisotropic magnet powder according to the present invention includes the steps of preparing a master alloy by cooling a rare-earth-iron-boron based molten alloy and subjecting the master alloy to an HDDR process. The step of prepar... | 02/22/2011 |
| 7871475 | Rare-earth magnet and manufacturing method thereof and magnet motor The object of the present invention is to provide a rare earth magnet which enables to achieve a good balance between high coercive force and high residual magnetic flux density, and its manufacturing method. The present invention provides a rare earth magnet in whi... | 01/18/2011 |
| 7867343 | Rare earth magnet and method for production thereof In a rare earth magnet, an added heavy rare earth element RH such as Dy is effectively used without any waste, so as to effectively improve the coercive force. First, a molten alloy of a material alloy for an R-T-Q rare earth magnet (R is a rare earth ele... | 01/11/2011 |
| 7846273 | R-T-B type alloy, production method of R-T-B type alloy flake, fine powder for R-T-B type rare earth permanent magnet, and R-T-B type rare earth permanent magnet An R-T-B type alloy (wherein R is at least one member selected from rare earth elements, T is a transition metal including Fe, and B includes boron) which is a raw material for use in a rare earth-based permanent magnet, wherein the volume percentage of the region c... | 12/07/2010 |
| 7842140 | Iron-based rare-earth nanocomposite magnet and method for producing the magnet The iron-based rare-earth nanocomposite magnet of the present invention has a composition T100−x−y−z−nQxRyTizMn, where T is Fe or a transition metal element in which Fe is partially replaced by Co and/or... | 11/30/2010 |
| 7806991 | Low loss magnet and magnetic circuit using the same A lamellar high resistance layer having resistivity ten times or higher than that of a mother phase containing iron or cobalt is formed and an oxygen content is controlled to 10 to 10000 ppm so that the reliability and residual magnetic flux density are increased. | 10/05/2010 |
| 7740715 | R-T-B based sintered magnet An R-T-B based sintered magnet according to the present invention has a composition comprising: 12 at % to 15 at % of a rare-earth element R; 5.0 at % to 8.0 at % of boron B; 0.1 at % to at % of Al; 0.02 at % to less than 0.2 at % of Mn; and a transition metal T as ... | 06/22/2010 |
| 7632360 | Rare earth magnet powder and method of producing the same A rare earth magnet powder has a chemical composition which includes R: 5 to 20% (wherein, R represents one or two or more rare earth elements being inclusive of Y but exclusive of Dy and Tb), one or two of Dy and Tb: 0.01 to 10%, and B: 3 to 20%, with the balance c... | 12/15/2009 |
| 7618497 | R-T-B based rare earth permanent magnet and method for production thereof An R-T-B system rare earth permanent magnet, which comprises main phase grains consisting of R2T14B compounds and a grain boundary phase having a higher amount of R than the above described main phase grains, and which satisfies AVE(X)/Y=0.8 to... | 11/17/2009 |
| 7608153 | Rare earth magnet and method therefor A rare earth magnet includes rare earth magnet particles; and amorphous and/or crystalline terbium oxide present at the boundary of the rare earth magnet particles and represented by the formula: TbOn, wherein 1.5 | 10/27/2009 |
| 7569114 | Rare-earth magnet and manufacturing method thereof and magnet motor The object of the present invention is to provide a rare earth magnet which enables to achieve a good balance between high coercive force and high residual magnetic flux density, and its manufacturing method. The present invention provides a rare earth magnet in whi... | 08/04/2009 |
| 7559996 | Rare earth permanent magnet, making method, and permanent magnet rotary machine A rare earth permanent magnet is prepared from a sintered magnet body of a R1—Fe—B composition wherein R1 is a rare earth element inclusive of Y and Sc, by forming a plurality of slits in a surface of the magnet body, disposing a powder on ... | 07/14/2009 |
| 7534311 | R-t-b sintered magnet and rare earth alloy A rare-earth sintered magnet according to the present invention, of which the main phase is an R2T14B type compound phase, includes: 27 mass % through 32 mass % of R, which is at least one rare-earth element that is selected from the group cons... | 05/19/2009 |
| 7520941 | Functionally graded rare earth permanent magnet A functionally graded rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein the concentration of R2 | 04/21/2009 |
| 7507302 | Method for producing nanocomposite magnet using atomizing method A rare-earth alloy powder is obtained by rapidly cooling a melt of an alloy by an atomization process. The alloy has a composition represented by (Fe1-mTm)100-x-y-zQxRyTizMn, where T is at ... | 03/24/2009 |
| 7488395 | Functionally graded rare earth permanent magnet A functionally graded rare earth permanent magnet having a reduced eddy current loss in the form of a sintered magnet body having a composition RaEbTcAdFeOfMg is obtained by causing E and f... | 02/10/2009 |
| 7488394 | Rare earth permanent magnet A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein F and R2 are distributed such that thei... | 02/10/2009 |
| 7488393 | Rare earth permanent magnet A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1aR2bTcAdFeOfMg wherein F and R2 are distributed such that thei... | 02/10/2009 |
| 7485193 | R-FE-B based rare earth permanent magnet material A R—Fe—B base rare earth permanent magnet material consists of, in percents by weight, 25 to 45 wt % of R, 0.1 to 4.5 wt % of Co, 0.8 to 1.4 wt % of B, 0.05 to 3.0 wt % of Al, 0.02 to 0.5 wt % of Cu, 0.03 to 0.5 wt % of M, 0.01 to 0.5 wt % of C, 0.05 to 3.0 wt %... | 02/03/2009 |
| 7442262 | Alloy flake for rare earth magnet, production method thereof, alloy powder for rare earth sintered magnet, rare earth sintered magnet, alloy powder for bonded magnet and bonded magnet Disclosed is a rare earth magnet in the R-T-B (rare earth element-transition metal-boron) system that is made from an improved composition and properties of main phase alloy in the R-T-B system containing Pr and a boundary alloy. Disclosed also is a manufacturing me... | 10/28/2008 |
| 7438768 | Rare earth element sintered magnet and method for producing rare earth element sintered magnet Hydrogen embrittlement is prevented in Sm2Co17-based magnets and R2Fe14B-based magnets by metal plating the magnet, then carrying out heat treatment, or by forming a metal oxide or metal nitride layer on the metal plating ... | 10/21/2008 |
| 7431070 | Rare earth magnet alloy ingot, manufacturing method for the same, R-T-B type magnet alloy ingot, R-T-B type magnet, R-T-B type bonded magnet, R-T-B type exchange spring magnet alloy ingot, R-T-B type exchange spring magnet, and R-T-B type exchange spring bonded magnet One object of the present invention is to provide a rare earth magnet alloy ingot, which has improved magnetic properties. In order to achieve the object, the present invention provides a rare earth magnet alloy ingot, wherein the rare earth magnet alloy ingot compr... | 10/07/2008 |
| RE40524 | Magnet powder-resin compound particles, method for producing such compound particles and resin-bonded rare earth magnets formed therefrom The magnet powder-resin compound particles substantially composed of rare earth magnet powder and a binder resin are in such a round shape that a ratio of the longitudinal size a to the transverse size b (a/b) is more than 1.00 and 3 or less, and that an average par... | 09/30/2008 |
| 7416613 | Method for compacting magnetic powder in magnetic field, and method for producing rare-earth sintered magnet A method for compacting a magnetic powder in a magnetic field comprising steps of filling a die with a magnetic powder, applying a pulsed magnetic field to the magnetic powder in the die to orientate the powder, and compressing the magnetic powder, wherein the pulse... | 08/26/2008 |
| 7390369 | Method for producing rare earth based alloy powder and method for producing rare earth based sintered magnet An inventive method of making a rare-earth alloy powder is used to produce a rare-earth sintered magnet, whose main phase has a composition R2T14A (where R is one of the rare-earth elements including Y; T is Fe with or without a non-Fe transiti... | 06/24/2008 |
| RE40348 | Arc segment magnet, ring magnet and method for producing such magnets A thin arc segment magnet made of a an R-T-B based, rare earth sintered magnet substantially comprising 28-33 weight % of R and 0.8-1.5 weight % of B, the balance being substantially Fe T, wherein R is at least one rare earth element including Y, and... | 06/03/2008 |
| 7371472 | Permanent magnet ring In a permanent magnet ring (1) formed by arranging a plurality of unit permanent magnets (21a, 21b, 21c . . . ), each of a plurality of the unit permanent magnets (21a, 21b, 21c | 05/13/2008 |
