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| Number | Title | Issue Date |
| 8158018 | Ferrite sintered body and manufacturing method therefor The ferrite sintered body of the present invention contains main components consisting of 52 to 54 mol % Fe2O3, 35 to 42 mol % MnO and 6 to 11 mol % ZnO as oxide equivalents and additives including Co, Ti, Si and Ca in specified amounts, and ha... | 04/17/2012 |
| 7790053 | Loss-loss Mn-Zn ferrite and electronic part made thereof and switching power supply A low-loss Mn—Zn ferrite comprising Fe, Mn and Zn as main components, Co, Ca and Si as first sub-components, and at least one Va-group metal as a second sub-component: Fe and Zn being 53-56% by mol (calculated as Fe2O3) and 1-9% by mol (calcu... | 09/07/2010 |
| 7758767 | Oxide magnetic material and sintered magnet An oxide magnetic material according to the present invention is represented by the formula: (1−x)CaO.(x/2)R2O3.(n−y/2)Fe2O3.yMO, where R is at least one element selected from the group consisting of La, Nd and Pr and ... | 07/20/2010 |
| 7754094 | Sintered ferrite and its production method and electronic part using same A sintered ferrite body having a main composition comprising 63-80% by mol of Fe2O3, and 3-15% by mol of ZnO, the balance being manganese oxide; Rcal determined from the Fe2O3 content X (% by mol) by the formula... | 07/13/2010 |
| 7547400 | Nanoparticle nickel zinc ferrites synthesized using reverse micelles A method for making monodispersed magnetic nanoparticles of nickel zinc ferrite (NZFO) at room temperature by mixing together two micelle solutions. The first micelle solution comprises zinc, nickel, and iron metal salts; a surfactant; and a hydrocarbon. The second ... | 06/16/2009 |
| 7540972 | Mn-Zn based ferrite material For the purpose of providing a Mn—Zn based ferrite material that is small in magnetic field degradation in high frequency bands of 1 MHz or more, the Mn—Zn based ferrite material includes: as main constituents, Fe2O3: 53 to 56 mol %, ZnO: 7... | 06/02/2009 |
| 7481946 | Method for producing ferrite material and ferrite material The present invention provides a production method of a ferrite material comprising as main constituents Fe2O3: 62 to 68 mol %, ZnO: 12 to 20 mol %, and MnO substantially constituting the balance, wherein the method comprises a compacting step ... | 01/27/2009 |
| 7422697 | Composite 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 |
| 7410625 | Process 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 |
| 7378036 | Ferrite material and electronic component using the same A ferrite material of the present invention is configured such that 0.05 to 1.0 wt % of bismuth oxide in terms of Bi2O3, 0.5 to 3.0 wt % of tin oxide in terms of SnO2, and 30 to 5000 wt ppm of chromium oxide in terms of Cr2 | 05/27/2008 |
| 7332101 | Permanently 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 |
| 7326360 | Cobalt ferrite based magnetostrictive materials for magnetic stress sensor and actuator applications Magnetostrictive material based on cobalt ferrite is described. The cobalt ferrite is substituted with transition metals (such manganese (Mn), chromium (Cr), zinc (Zn) and copper (Cu) or mixtures thereof) by substituting the transition metals for iron or cobalt to f... | 02/05/2008 |
| 7311854 | Ferrite sintered body, manufacturing method thereof, ferrite core using same, and ferrite coil A ferrite sintered body is composed of an oxide containing, as metal element, at least Fe and Zn and at least one selected from Ni, Cu and Mn. This sintered body contain Fe of 42 to 50 mol % in terms of Fe2O3, and Zn of 15 to 35 mol % in terms ... | 12/25/2007 |
| 7297291 | Stress stabilized ferrimagnetic material and method of manufacture A stress stabilized ferrimagnetic material has a retained stress to provide enhanced initial permeability stability over a range of operating temperatures, such as from −40° C. to 85° C., as well as pressures. Stress is introduced into the ferrimagnetic material... | 11/20/2007 |
| 7294284 | Method for producing Mn-Zn ferrite The present invention provides a Mn—Zn ferrite which is low in the loss in the frequency range between a few 10 kHz and a few 100 kHz and high in the saturation magnetic flux density in the vicinity of 100° C. The present invention comprising the steps of compact... | 11/13/2007 |
| 7294971 | Balancing transformers for ring balancer A ring balancer comprising a plurality of balancing transformers facilitates current sharing in a multi-lamp backlight system. The balancing transformers have respective primary windings separately coupled in series with designated lamps and have respective secondar... | 11/13/2007 |
| 7289010 | Mn-Zn based ferrite member There is provided a Mn—Zn based ferrite member excellent in mass productivity, high in withstand voltage, low in loss and excellent in direct current superposition property. The Mn—Zn based ferrite member is provided with a surface layer portion having the prope... | 10/30/2007 |
| 7268991 | Electrical circuit protection system A system to protect electrical circuits from rapid changes of voltage associated with a fault in an electrical load comprises an inductor placed in series between a drive circuit and load. The inductor is designed to be inefficient or lossy when the inductor core is... | 09/11/2007 |
| 7258732 | Stabilized slurry composition and method of making the same The present invention provides a high solids mineral slurry having long term stability and a method for producing the same. Specifically, the present invention provides a talc slurry having a solids content of up to 65% and a stability against sedimentation for up t... | 08/21/2007 |
| 7244317 | Dispensible brazing paste A dispensable brazing paste useful in lamp manufacturing includes a brazing powder and a water soluble vehicle that has water, glycerin, a binder, and a dispersant that includes ammonium stearate and ammonium citrate. Preferably, the brazing powder is 84-87 wt % of ... | 07/17/2007 |
| 7238298 | Ni-Cu-Zn-based ferrite material and process for the production thereof An Ni—Cu—Zn-based ferrite material contains TiO2 alone as an additive in an amount of 0.1 wt % | 07/03/2007 |
| 7232557 | Method 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 |
| 7202766 | Magnetic element A magnetic element superior in high frequency characteristics is provided that comprises magnetic ferrite having iron oxide, cobalt oxide and zinc oxide as the main ingredients, a conducting coil formed over the magnetic ferrite, an insulating material covering the ... | 04/10/2007 |
| 7195717 | Ferrite core for RFID application, method of manufacturing the same, and ferrite coil using the same A ferrite core comprising a sintered oxide containing at least 48.6 to 53.9 mol % of Fe on Fe2O3 basis, 12.3 to 35.2 mol % of Ni on NiO basis and 16.4 to 37.0 mol % of Zn on ZnO basis as metal elements, and contains a crystal phase comprising t... | 03/27/2007 |
| 7179337 | Method for producing a soft magnetic material 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 surfaces of a soft magnetic p... | 02/20/2007 |
| 7148767 | Bead type noise filter A bead type noise filter according to the present invention is constituted by a magnetic core 1 formed of Mn—Zn ferrite having its resistivity increased so as to improve a high frequency characteristic, and having its permittivity lowered, and thereby can s... | 12/12/2006 |
| 7118728 | Method and apparatus for making ferrite material products and products produced thereby A method for making ferrite powder may include providing ferrite feed materials in a form of particles having different sizes and irregular shapes, and exposing the ferrite feed materials to a plasma to provide a more spherical shape to irregularly shaped particles ... | 10/10/2006 |
| 7112924 | Electronic energy switch for particle accelerator Some embodiments include an accelerator waveguide to receive RF power, the accelerator waveguide comprising a side cavity, an element fixedly disposed within the side cavity, and a device coupled to the element, wherein the device and the element are operable to con... | 09/26/2006 |
| 7108799 | Electromagnetic wave absorber formed of Mn-Zn ferrite An electromagnetic wave absorber is formed of an Mn—Zn ferrite including: a spinel primary phase which contains 40.0 to 49.9 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, and the remainder consisting of MnO; and a secondary phase which contains CaO as ... | 09/19/2006 |
| 7101489 | Composite 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 |
| 7101488 | Electromagnetic wave absorber formed of Mn-Zn ferrite An electromagnetic wave absorber is formed of an Mn—Zn ferrite including: a spinel primary phase which contains 40.0 to 49.9 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.1 to 4.0 mol % TiO2 and/or SnO2, and the remainder consis... | 09/05/2006 |
| 7034649 | Ferrite material, ferrite sintered body, and inductor A ferrite material having a high Q value and also having a small absolute value of αμir in a wide temperature range between −40° C. and 160° C. A ferrite material, which comprises, as main constituents, 45.5 to 48 mol % of Fe2O3, 5... | 04/25/2006 |
| 7014881 | Synthesis of multi-element oxides useful for inert anode applications An inert anode 50, for use in an electrolytic cell 12 for producing metals such as aluminum, is made by providing chemical source materials 100 such as at least two of metal salts, metal particles, or metal oxides and dissolving them to form a s... | 03/21/2006 |
| 7011764 | Method 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 |
| 7000315 | Method of making photolithographically-patterned out-of-plane coil structures An out-of-plane micro-structure which can be used for on-chip integration of high-Q inductors and transformers places the magnetic field direction parallel to the substrate plane without requiring high aspect ratio processing. The photolithographically patterned coi... | 02/21/2006 |
| 7001443 | Method for producing a metallic alloy by the oxidation and chemical reduction of gaseous non-oxide precursor compounds A metallic alloy is prepared from a gaseous mixture of at least two non-oxide precursor compounds, wherein the non-oxide precursor compounds collectively comprise the metallic constituents. The mixture of the non-oxide precursor compounds is oxidized to form a solid... | 02/21/2006 |
| 6994797 | Permanent magnet and method for preparation thereof A ferrite magnet obtained by adding at least one element selected from the group consisting of Co, Ni, Mn and Zn 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 element that is se... | 02/07/2006 |
| 6991742 | Mn-Zn ferrite and coil component with magnetic core made of same A Mn—Zn ferrite and a coil component are provided which obtains a low core loss in a frequency band above 1 MHz and even above 5 MHz and which can duly function in such a high frequency band. The Mn—Zn contains as basic components 44.00 to 50.0 mol % Fe2O3 (50 m... | 01/31/2006 |
| 6984338 | Mn-Zn ferrite containing less than 50 mol % FeO An Mn—Zn ferrite includes base components of 44.0 to 49.8 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.8 mol % or less Mn2O3, and the remainder consisting of MnO, and contains 0.20 (0.20 excluded) to 1.00 mass % CaO as additive... | 01/10/2006 |
| 6984337 | Mn—Zn ferrite containing less than 50 mol% Fe2O3 An Mn—Zn ferrite includes base components of 44.0 to 49.8 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, at least one of 0.1 to 4.0 mol % TiO2 and SnO2, 0.5 mol % or less Mn2O3, and the remainder consisting of... | 01/10/2006 |
