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Class 252/62.64 - Magnesium


Subclass of Class 252 - Compositions
Definition: Compositions containing magnesium.
No. of patents: 120
Last issue date: 09/09/2008


1      
NumberTitleIssue Date
7422697Composite sintered magnetic material, its manufacturing method, and magnetic element using composite sintered magnetic material
A composite sintered magnetic material comprises a kind of metal powder at least one selected from the group consisting of Fe, Fe—Si type, Fe—Ni type, Fe—Ni—Mo type, and Fe—Si—Al type, and a ferrite layer formed from a kind of ferrite powder at least one...
09/09/2008
7410625Process of making metal containing iron oxide and iron sulfide based nanoparticle materials
A method and structure for making magnetite nanoparticle materials by mixing iron salt with alcohol, carboxylic acid and amine in an organic solvent and heating the mixture to 200-360° C. is described. The size of the particles can be controlled either by changing ...
08/12/2008
7384571Ferrite magnet powder bond magnet
A ferrite magnetic powder for bond magnet that experiences only small decrease in coercivity when molded into a bond magnet is provided, which is a ferrite magnetic powder that includes an alkaline-earth metal constituent and exhibits a decrease in coercivity of not...
06/10/2008
7332101Permanently linked, rigid, magnetic chains
One aspect of the present invention relates to a permanently linked, rigid, magnetic chain of particles prepared by sol-gel methods. A second aspect of the present invention relates to a method of preparing a permanently linked, rigid, magnetic chain of particles co...
02/19/2008
7232557Method for preparation of magnetic spinel ferrites from layered double hydroxide precursors
The invention describes a method of preparing magnetic ferrites from layered precursors in which Fe2+ is first introduced into the layers of layered double hydroxides (LDHs) in order to prepare Me-Fe2+—Fe3+ LDHs, and then by utiliz...
06/19/2007
7211740Valve metal electromagnetic interference filter
A valve metal electromagnetic interference filter (VMEIF). The filter comprises a porous valve metal pellet with at least three terminals extending therefrom. A dielectric layer at least partially circumvents the sintered porous valve metal pellet. A conductive laye...
05/01/2007
7147796Iron oxide particles and method for production thereof
Iron oxide particles having the surface thereof coated with a layer of a complex iron oxide containing Al and Mg are disclosed. The total content of Al and Mg in the complex iron oxide layer is 0.1 to 2.5% by weight based on the whole iron oxide particles. The Mg co...
12/12/2006
7101489Composite magnetic material and a method for producing the same
A composite magnetic material contains first magnetic particles made of a first magnetic material and second magnetic particles made of a second magnetic material, the first and second magnetic particles being mixed with each other. A frequency characteristic of the...
09/05/2006
7011764Method for producing a magnetic device
A magnetic device and method for making it involve a magnetic device specifically constructed of grains in a matrix. The matrix may be cement or plaster. The grains have an average diameter that is greater than their magnetic domains. The device may be applied to sh...
03/14/2006
6908568Preparation of oxide magnetic material and oxide magnetic material
An oxide magnetic material is prepared by wet molding in a magnetic field a slurry containing a particulate oxide magnetic material, water and a polyhydric alcohol having the formula: Cn(OH)nHn+2 wherein n is from 4 to 100 as a dispe...
06/21/2005
6897248UV curable ferromagnetic compositions
The present invention discloses an ultraviolet light curable ferromagnetic composition and method for making such a composition that may be used to produce a ferromagnetic coating on a suitable substrate. These coatings may be used to produce printed capacitors and ...
05/24/2005
6893581Composite magnetic material and a method for producing the same
A composite magnetic material contains first magnetic particles made of a first magnetic material and second magnetic particles made of a second magnetic material, the first and second magnetic particles being mixed with each other. A frequency characteristic of the...
05/17/2005
6872325Polymeric resin bonded magnets
Briefly, in accordance with one embodiment of the present invention, a process for making a magnetic composite which comprises providing a polymeric resin and a magnetic powder, the magnetic powder having a mean particle size with a value for standard deviation that...
03/29/2005
6872251Method for manufacturing single crystal ceramic powder, and single crystal ceramic powder, composite material, and electronic element
A method for manufacturing single crystal ceramic powder is provided. The method includes a powder supply step for supplying powder consisting essentially of ceramic ingredients to a heat treatment area with a carrier gas, a heat treatment step for heating the powde...
03/29/2005
6814883High frequency magnetic material and high frequency circuit element including the same
A high frequency magnetic material includes a Y or M type hexagonal ferrite, wherein the hexagonal ferrite is expressed by the composition formula (1-a-b)(Ba1-xSrx)O.aMeO.bFe2O3, where Me is at least one selected from the ...
11/09/2004
6790379Magnetic ferrite composition and process of production thereof
A magnetic ferrite composition including at least one of Mg, Ni, Cu, Zn, Mn, and Li and having a content of carbon within a predetermined range, for example, over 9.7 weight ppm to less than 96 weight ppm. The composition may be used as the magnetic core for an indu...
09/14/2004
6767478Mn-Zn ferrite and coil component using same
The Mn—Zn ferrite of the present invention contains basic components of 44.0 to 50.0 mol % (50.0 mol % is excluded) Fe2O3, 4.0 to 26.5 mol % ZnO and the remainder MnO, and has a real part ε′ of complex relative permittivity of 20,000 or le...
07/27/2004
6749768Magnetic ferrite powder, magnetic ferrite sinter, layered ferrite part, and process for producing layered ferrite part
Provided is magnetic ferrite powder in which a peak intensity ratio of Z phase (M3Me2Fe24O41: M=one or more kinds of alkaline-earth metal, Me=one or more kinds from Co, Ni, Mn, Zn, Mg and Cu) of hexagonal ferrite is 30% or...
06/15/2004
6716893UV curable ferromagnetic compositions
The present invention discloses an ultraviolet light curable ferromagnetic composition and method for making such a composition that may be used to produce a ferromagnetic coating on a suitable substrate. These coatings may be used to produce printed capacitors and ...
04/06/2004
6689287Ferroelectric and ferromagnetic material having improved impedance matching
The subject invention includes a composite material comprising a ferroelectric material and a ferromagnetic material having a loss factor (tan δ) for the composite material which includes a dielectric loss factor of the ferroelectric material and a magne...
02/10/2004
6666991Fluorescent or phosphorescent composition
A fluorescent or luminous composition, comprising a multilayered film-coated powder having at least two coating films on a base particle, and a fluorescent or luminous substance; the composition, wherein at least one layer of the coating films contains th...
12/23/2003
6652767Composition for plastic magnet
In a composition for a plastic magnet, containing an Nd--Fe--B based alloy powder and a ferrite magnetic material powder mixed to a resin material, the Nd--Fe--B based alloy powder has particle sizes distributed in a range of 100 to 400 μm, and the ferri...
11/25/2003
6652768Magnetic ferrite composition and process of production thereof
A magnetic ferrite composition including at least one of Mg, Ni, Cu, Zn, Mn, and Li and having a content of carbon within a predetermined range, for example, over 9.7 weight ppm to less than 96 weight ppm. The composition may be used as the magnetic core ...
11/25/2003
6623879Soft-magnetic hexagonal ferrite composite particles, and green sheet using the same and soft-magnetic hexagonal ferrite sintered ceramics
Soft-magnetic hexagonal ferrite composite particles composed of 100 parts by weight of soft-magnetic hexagonal ferrite particles containing a Z-type ferrite, Y-type ferrite or W-type ferrite as a main phase, 0.3 to 10 parts by weight of barium carbonate p...
09/23/2003
6569346Ferrite with high permeability and high dielectric constant and method for making the same
A ferrite with a high permeability and a high dielectric constant is introduced. Raw material powders, such as TiO2, Fe2 O3 and the oxide of Mn, Ni, Cu, Mg, Li or Zn is prepared and combined in the proportion Tix
05/27/2003
6533956Powder for magnetic ferrite, magnetic ferrite, multilayer ferrite components and production method thereof
A multilayer ferrite component is produced with powder for magnetic ferrite, characterized by having the composition of Fe2 O3 : 40 to 51 mol %, CuO: 7 to 30 mol %, ZnO: 0.5 to 35 mol % and MgO: 5 to 35 mol %, in which a peak of part...
03/18/2003
6495059Magnetic ferrite composition and process of production thereof
A magnetic ferrite composition including at least one of Mg, Ni, Cu, Zn, Mn, and Li and having a content of carbon within a predetermined range, for example, over 9.7 weight ppm to less than 96 weight ppm. The composition may be used as the magnetic core ...
12/17/2002
6416681Granule for forming ferrite body, ferrite sintered product and production method thereof
Granule for forming ferrite is provided by mixing powders of ferrite raw material, polyvinyl alcohol as a binder and polyethylene glycol added as plasticizer and having molecular weight being 1000 to 6000, and forming granules....
07/09/2002
6416682Method of producing minerals under near-critical, critical and supercritical conditions
The present invention relates to methods of producing synthetic crystals (typically minerals) or comparable inorganic compounds by reactions of metal salts and metal oxyhydroxides under near-critical, critical or supercritical solvent conditions, avoiding...
07/09/2002
6375862Ferrite sintered compact
The present invention can provide a MgCuZn-based ferrite sintered compact which is constituted by having as substantial main component compositions 7.5 to 23.0 mole % of magnesium oxide, 7.0 to 20.0 mole % of copper oxide, 19.0 to 24.2 mole % of zinc oxid...
04/23/2002
6264875Preparation of multi-purpose magnetized and sintered ceramics
The present invention relates to a method for preparing multi-purpose magnetized and sintered ceramics, comprising the steps of adding water to a mixture of Maek-Ban Stone and soft sericite, stirring and maturing at a room temperature, sintering, and irra...
07/24/2001
6210597Radio wave absorbent
Since the radio wave absorbent of the present invention has the main component of a magnesium-zinc system ferrite material containing 45 to 50 mol % of iron oxide, 7 to 19.7 mol % of magnesium oxide, 24 to 28.5 mol % of zinc oxide, 4 to 16 mol % of copper...
04/03/2001
6200493MnMgCuZn ferrite material
There is disclosed an MnMgCuZn ferrite material which contains ranges of 46.5 to 50.4 mol % of iron oxide, 10.5 to 22.0 mol % of magnesium oxide, 22.5 to 25.0 mol % of zinc oxide, 6.0 to 16.0 mol % of copper oxide, and 0.1 to 3.5 mol % of manganese oxide....
03/13/2001
6193904Method for preparation of ferrites
Methods of preparing ferrite powders for use in microwave elements such as isolators, circulators, phase shifters and transmission line elements. In one method separate precipitations of metal dicarboxylate salts such as oxalates or malonates are mixed wi...
02/27/2001
6183659Ferrite oxide magnetic material
A ferrite oxide magnetic material containing, as basic composition, 11 to 19 mol % of iron oxide calculated in terms of Fe2 O3, 11 to 25 mol % of zinc oxide calculated in terms of ZnO, 0 to 10 mol % of copper oxide calculated in term...
02/06/2001
6143194Magnetic iron oxide, process for its production and the use thereof
The invention relates to magnetite particles having an iron content of 45 to 73 wt. %, a process for their production and their use for the production of toners, printing inks and inks for ink jet printers....
11/07/2000
6127296Ceramic-glass composite material and method for the preparation thereof
Disclosed is a novel ceramic-glass composite material useful as a material of electronic parts for attenuation of noise components in the GHz range. The composite material is a sintered body obtained by a heat treatment of a powder blend consisting of 35-...
10/03/2000
6080233Cobalt-containing iron oxide pigments, process for producing the same and magnetic recording medium containing the same
Disclosure describes a cobalt-containing iron oxide pigments comprising: a cobalt-containing iron oxide core, the average concentration of cobalt distributed evenly in an innermost 50% by weight of the cobalt-containing iron oxide core being from 0.1 to 1.0% b...
06/27/2000
6077454Ferrite compositions for use in a microwave oven
A ferrite composition is created by adding a high Curie temperature ferrite, such as lithium ferrite, to a soft magnetic ferrite, such as magnesium manganese zinc ferrite. The composition is used in a microwave oven dish or laminate wrap to crisp or brown...
06/20/2000
6063719Ceramic ferrite/ferroelectric composite material
A novel ceramic ferrite/ferroelectric composite material having a low dissipation factor, voltage tunability, and proper impedance matching for the incident medium. The material comprises ferrites doped with the ferroelectric Barium Strontium Titanate (BS...
05/16/2000
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