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7470308 |
In a method of producing magnetic particles which includes the steps of preparing alloy particles capable of forming a CuAu or Cu 3 Au hard magnetic ordered alloy phase and of forming magnetic particles for forming CuAu or Cu 3 Au magnet...
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RE40524 |
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 ...
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7390567 |
A soft magnetic compact which is produced by using soft magnetic composite powder in which the surface of magnetic powder is covered with an electrical insulating material containing at least an inorganic insulating material, and a resin...
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7371271 |
An object of the present invention is to provide a composite soft magnetic sintered material that has high density, high mechanical strength and high relative magnetic permeability at high frequencies and, in order to achieve this object...
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7273405 |
A method of producing a sintered rare earth magnetic alloy wafer comprises a step of using a cutter to slice a wafer of a thickness of not greater than 3 mm from a sintered rare earth magnetic alloy having ferromagnetic crystal grains su...
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7270718 |
The invention provides a method for manufacturing a soft magnetic powder material covered by oxide layers at surfaces of the powder, by using a soft magnetic alloy powder containing a soft magnetic powder material and a second element su...
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7179337 |
The invention provides a method for preparing a soft magnetic material which meets demands for low iron loss, high density, high strength and high productivity. The method comprises a surface oxidation step of forming oxide films on the ...
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7175717 |
A method for making a nano-scale amorphous soft magnetic powders obtained by thermally processing and crystallizing amorphous ribbons produced using a rapid solidification process (RSP) and crushing the same. The amorphous soft magnetic ...
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7172660 |
A method for making an amorphous soft magnetic core using Fe-based amorphous metal powders is provided. The amorphous soft magnetic powders are obtained by crushing amorphous ribbons produced using a rapid solidification process (RSP). T...
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7172642 |
Magnetic metal particles containing iron as a main component, comprising cobalt in an amount of usually 20 to 50 atm %, calculated as Co, based on whole Fe, aluminum in an amount of usually 3 to 15 atm %, calculated as Al, based on whole...
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7166172 |
A ferromagnetic iron alloy powder for a magnetic recording medium is composed of acicular iron-base particles of an average major axis length (X) of not less than 20 nm and not greater than 80 nm and have oxygen content of not less than ...
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7144642 |
A ferrite magnet obtained by adding a ferrite having a hexagonal W-type magnetoplumbite structure to a ferrite having a hexagonal M-type magnetoplumbite structure, in which a portion of Sr, Ba, Pb or Ca is replaced with at least one elem...
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7144463 |
The present invention relates to highly quenchable Fe-based rare earth magnetic materials that are made by rapid solidification process and exhibit good magnetic properties and thermal stability. More specifically, the invention relates ...
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7138018 |
A method for manufacturing an anisotropic magnet powder includes a high-temperature hydrogenation process of holding an RFeB-based alloy containing rare earth elements (R), B and Fe as main ingredients in a treating atmosphere under a fi...
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7029769 |
An insulation film whose requisite constituent elements are first elements and a second element. The first elements include B, P, O and Fe. The second element can generate cations whose hexa-coordinated ion radius, defined by Shannon, R....
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6929757 |
A magnetorheological fluid containing magnetorheological particles which are resistant to oxidation having regions rich in diffused nitrogen located therein and a method for producing such magnetorheological fluid.
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6827758 |
A method for manufacturing magnetic metal powder is provided. In the method, a powdered magnetic metal oxide is supplied to a heat treatment furnace with a carrier gas composed of a reducing gas. The heat treatment furnace is maintained ...
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6821357 |
Permanent magnets in which the ferromagnetic phase is matched with the grain boundary phase, and permanent magnets in which magnetocrystalline anisotropy in the vicinity of the outermost shell of the major phase is equivalent in intensit...
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6808807 |
A coated ferromagnetic particle comprises a ferromagnetic core and a coating. The coating comprises a residue resulting from a thermal treatment of a coating material comprising a polymer selected from the group consisting of polyorganos...
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6783798 |
Thin, flexible composite materials, which are magnetic or magnetizable and processes for producing and using the materials. The composite material contains a laminate formed from a mixture of magnetic or magnetizable particles, binder pa...
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6780255 |
A magnetic powder of an Sm—Fe—N alloy, which has a mean particle diameter of 0.5 to 10 μm, and either an average acicularity of 75% or above or an average sphericity of 78% or above. The powder exhibits an extremely high residual ma...
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6770242 |
Permanent magnet for voice coil actuator motors used to actuate head-arm assemblies in small form disk drives are produced from a dispersion of prealloyed rare earth magnetic particles in a thermoplastic binder. Upon shaping of green par...
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6720094 |
Secondary agglomerates of magnetic metal particles containing primary particles having an average major axial diameter of 0.05 to 0.25 μm, said secondary agglomerates having an average particle diameter of 300 to 800 μm, an upper limit...
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6709533 |
This invention aims to provide a manufacturing method of an anisotropic magnet powder from which a bonded magnet with an improved loss of magnetization due to structural changes can be achieved. This is achieved by employing a low-temper...
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6682813 |
Magnetic acicular alloy particles containing iron as a main component according to the present invention, have an average major axial diameter of 0.05 to 0.2 μm, and pH values of water suspensions of said magnetic acicular alloy particl...
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6676730 |
The present invention relates to a method of producing Nd—Fe—B based nanophase powder, or more particularly, to a method of producing Nd 2 Fe 14 B phase powder of 1 μm or less, having Nd 2 Fe 14 B crystal grains of 50 nm or less, wh...
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6638367 |
The objects of the present invention are to provide a method of producing highly weather-resistant iron-based magnet powder containing a rare-earth element, particularly characterized by high coercive force in a practically important hum...
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6635120 |
A sintered rare earth magnet is produced by finely pulverizing a coarse rare earth magnet alloy powder to an average particle size of 1-10 μm in a non-oxidizing atmosphere; introducing the resultant fine rare earth magnet alloy powder i...
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6610415 |
Thin, flexible composite materials, which are magnetic or magnetizable and processes for producing and using the materials. The composite material contains a laminate formed from a mixture of magnetic or magnetizable particles, binder pa...
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6599465 |
According to the inventive method for producing a composite part ( 4 ), a support body ( 1 ) is produced from a powder with a ferrous alloy base using powder metallurgy. A magnet body ( 2 ) which is based on an alloy that is rich in rare...
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6591483 |
A method is provided for depositing a spatially fine pattern of magnets on a substrate. The substrate can be fabricated from any number of materials, such as plastics, metals or ceramics. When sufficiently magnetized, the magnets will pr...
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6533837 |
A method of recovering magnetic powder from rare earth bond magnet comprising a process of soaking the rare earth bond magnet in a decomposing solution, or holding it in a gas phase of the decomposing solution, containing at least one so...
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RE38021 |
A the magnetically anisotropic magnetic powder having an average particle size of 1—1000 μm and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 μm, wherein R repres...
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6524399 |
Magnetic materials having a coercivity not less than about 1000 Oersted are prepared in a single step procedure. A molten mixture of a desired composition having a relatively high boron content is cooled at a rate slower than about 105 d...
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6517934 |
A rare earth-iron-boron magnetic powder comprising a rare earth element, iron and boron, which has a coercive force of 80 to 400 kA/m, a saturation magnetization of 10 to 25 μW/g, an average particle size of 5 to 200 nm, and a particula...
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6491765 |
The method for manufacturing alloy powder for R—Fe—B type rare earth magnets of the present invention includes a first pulverization step of coarsely pulverizing a material alloy for rare earth magnets and a second pulverization step...
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6471786 |
The inventive method for preparing nanocomposite magnet powder includes the step of preparing material alloy powder for a nanocomposite magnet represented by a general formula Fe 100−x−y−z−u R x B y Co z M u where R is a rare-ea...
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6447618 |
Magnetic acicular alloy particles containing iron as a main component according to the present invention, have an average major axial diameter of 0.05 to 0.2 μm, and pH values of water suspensions of said magnetic acicular alloy particl...
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6423386 |
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 ...
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6352597 |
A method is disclosed enabling a technologically controllable and economical production of a hard-magnetic powder composed of a samarium-cobalt base alloy for highly coercive permanent magnets. The method is based on a HDDR treatment in ...
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6328817 |
There is provided a powder for permanent magnet comprising needle-like fine particles of Fe or Fe--Co alloy as a base material, a hard magnetic layer and a separation layer of an oxide of rare earth element provided outside said hard mag...
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6254662 |
A method and structure for forming magnetic alloy nanoparticles includes forming a metal salt solution with a reducing agent and stabilizing ligands, introducing an organometallic compound into the metal salt solution to form a mixture, ...
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6221270 |
A process for producing a compound for a rare earth metal resin-bonded magnet includes: a slurry preparation step of mixing materials containing a magnetic alloy powder of a rare earth metal alloy, a resin binder, and an organic solvent ...
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6193903 |
Ceramic-coated powdered ferromagnetic materials for forming magnetic articles, and which maintain the mechanical and magnetic properties of the articles at high temperatures, such as during annealing to relieve stresses induced during th...
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6110420 |
A composite structure and method for manufacturing same, the composite structure being comprised of metal particles and an inorganic bonding media. The method comprises the steps of coating particles of a metal powder with a thin layer o...
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6103021 |
The present invention is directed to provide a method of preparing a raw material powder for permanent magnets superior in moldability, especially in moldability and productivity of bonded magnets. The method comprises subjecting an acic...
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6063303 |
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6051077 |
The present invention is directed to provide a raw material powder for modified permanent magnets capable of enhancing magnetic properties of iron.rare earth element metal.boron permanent magnets and reducing the production cost, and fur...
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6051047 |
The present invention relates to the preparation of Nd--Fe--B permanent magnetic alloys and more particularly to a process of preparing Nd--Fe--B permanent magnetic alloys with neodymium, iron and boron as their basic constituents, where...
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6045629 |
An alloy used for the production of a rare-earth magnet alloy, particularly the boundary-phase alloy in the two-alloy method is provided to improve the crushability. The alloy consists of (a) from 35 to 60% of Nd, Dy and/or Pr, 1% or les...
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