With Titanium, Zirconium, Silicon, Hafnium, Germanium, Or Tin Patents (Class 252/62.59)
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Patent number: 8404338Abstract: An article and thermoplastic composition including polycarbonate, a polysiloxane-polycarbonate and an x-ray detectable or metal detectable agent having good magnetic permeability and/or electrical conductivity wherein the composition may be used in articles for food preparation. The thermoplastic compositions are useful in forming molds for manufacturing a food product, such as chocolate molds.Type: GrantFiled: September 30, 2009Date of Patent: March 26, 2013Assignee: Sabic Innovative Plastics IP B.V.Inventors: Christopher Luke Hein, Jan-Pleun Lens, Vandita Pai-Paranjape, Constant Peek, Robert Dirk van de Grampel
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Patent number: 8404142Abstract: A MnZn ferrite having excellent characteristics of an incremental permeability ?? value of 250 or greater in a wide temperature range of 0 to 85° C. and an incremental permeability ?? value of 400 or greater at 65° C. when an 80 A/m direct current magnetic field is applied is provided. The MnZn ferrite has basic components that comprise: ferric oxide (in terms of Fe2O3): 51.0 to 54.5 mol %, zinc oxide (in terms of ZnO): 8.0 to 12.0 mol %, and manganese oxide (in terms of MnO): the balance, sub components that comprise: silicon oxide (in terms of SiO2): 50 to 400 mass ppm, and calcium oxide (in terms of CaO): 50 to 400 mass ppm, and unavoidable impurities phosphorous, boron, sulfur and chlorine that are restricted to phosphorous: less than 3 mass ppm, boron: less than 3 mass ppm, sulfur: less than 5 mass ppm, and chlorine: less than 10 mass ppm.Type: GrantFiled: January 23, 2009Date of Patent: March 26, 2013Assignee: JFE Chemical CorporationInventors: Hirofumi Yoshida, Yukiko Nakamura, Satoshi Goto
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Publication number: 20130050041Abstract: Disclosed are synthetic garnets and related devices that can be used in radio-frequency (RF) applications. In some embodiments, such RF devices can include garnets having reduced or substantially nil Yttrium or other rare earth metals. Such garnets can be configured to yield high dielectric constants, and ferrite devices, such as TM-mode circulators/isolators, formed from such garnets can benefit from reduced dimensions. Further, reduced or nil rare earth content of such garnets can allow cost-effective fabrication of ferrite-based RF devices. In some embodiments, such ferrite devices can include other desirable properties such as low magnetic resonance linewidths. Examples of fabrication methods and RF-related properties are also disclosed.Type: ApplicationFiled: May 30, 2012Publication date: February 28, 2013Applicant: SKYWORKS SOLUTIONS, INC.Inventors: David Bowie CRUICKSHANK, Rickard Paul O'DONOVAN, Iain Alexander MACFARLANE, Brian MURRAY, Michael David HILL
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Publication number: 20130033354Abstract: Disclosed herein are a ferrite powder having a core-shell structure, the core being made of iron (Fe) or iron-based compounds comprising iron (Fe) and the shell being made of metal oxides, a ferrite material comprising the ferrite powder and the glass, and multilayered chip components including the ferrite layer using the ferrite material, inner electrodes, and outer electrodes. According to the exemplary embodiments of the present invention, it is possible to provide the ferrite material capable of improving the change in the inductance L value in response to applied current by suppressing magnetization at high current. The multilayered chip components including the ferrite material according to the exemplary embodiment of the present invention can also be used in a band of MHz.Type: ApplicationFiled: August 1, 2012Publication date: February 7, 2013Inventors: Sung Yong An, Myeong Gi Kim, Ic Seob Kim
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Patent number: 8337714Abstract: The present invention provides ferrite powders for bonded magnet capable of suppressing increase of SFD, while widening a particle size distribution for obtaining flowability and compressed density, and also capable of suppressing deterioration of orientation and magnetizability, and provides a process for a production magnetoplumbite-type ferrite powders containing an oxide of at least one or more kinds of transition metals selected from a group consisting of Zr, Ti, Zn, Co, Mn, and Ni, having a mean particle size of 0.20 ?m or more and less than 5.00 ?m, being the ferrite powders for bonded magnet with the ratio of particles having particle size of 1 ?m or less being 20 mass % or more in the magnetoplumbite-type ferrite powder size distribution obtained by a laser diffraction type particle size distribution analyzer.Type: GrantFiled: September 26, 2008Date of Patent: December 25, 2012Assignees: Dowa Electronics Materials Co., Ltd., Dowa F-Tec Co., Ltd.Inventors: Kazuyuki Nakaue, Shinichi Suenaga, Masahiro Kojima, Hiroya Ikeda, Satoru Tsuboi
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Publication number: 20120319030Abstract: Disclosed is a multifunctional colloidal nanocomposite derived from nucleophilic substitution-induced layer-by-layer assembly in organic media. The multifunctional colloidal nanocomposite includes: silica colloids coated with aminopropyltrimethoxysilane; and a plurality of nanoparticle layers highly densely adsorbed onto the coated silica colloids. The multifunctional colloidal nanocomposite has a highly dense multilayer structure in which 2-bromo-2-methylpropionic acid (BMPA)-stabilized quantum dot nanoparticles and an amine-functionalized polymer are adsorbed onto silica colloids using a nucleophilic substitution reaction-based layer-by-layer assembly method. Due to this structure, the multifunctional colloidal nanocomposite can be dispersed in various organic solvents, including polar and nonpolar organic solvents.Type: ApplicationFiled: June 19, 2012Publication date: December 20, 2012Inventor: Jin Han CHO
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Patent number: 8335037Abstract: [Problem] When a nonreciprocal device operating at 100 GHz to 300 GHz is to be realized by using a conventional magnetic material of garnet-type ferrite or spinel-type ferrite, a huge permanent magnet is required and, therefore, it is very difficult to achieve a millimeter-wave band nonreciprocal device for practical use. [Solving means] To solve this problem, there is provided a millimeter-wave band nonreciprocal device composed of a magnetic material represented by a formula ?-MxFe2-xO3 (0<x<2), wherein M is at least one of elements In, Ga, Al, Sc, Cr, Sm, Yb, Ce, Ru, Rh, Ti, Co, Ni, Mn, Zn, Zr, and Y and the magnetic material having ?-phase hematite as a principal phase exhibits strong coercive force and anisotropic magnetic field at room temperature. Dimensions of a magnetic circuit containing a permanent magnet for operations of the nonreciprocal device can be made remarkably small and, by optimum design, the use of the magnetic circuit can be made unnecessary.Type: GrantFiled: October 17, 2008Date of Patent: December 18, 2012Assignees: The University of Tokyo, Dowa Electronics Materials Co., Ltd.Inventors: Shigeru Takeda, Shin-Ichi Ohkoshi
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Publication number: 20120264111Abstract: The present invention relates to a stable mixture comprising surface-modified particles which are obtained by reacting metal oxide or semimetal oxide particles with at least one compound selected from among silicon-comprising compounds bearing at least one metaloxy radical and optionally further alkoxy and/or hydroxy radical(s) and at least one solvent, at least one surface-active substance or a mixture thereof, a process for producing the mixture, the use of these particles in systems in which they are brought into contact with at least one solvent, where the mass ratio of solvent to modified particle is greater than 500, and also the use of these particles in agglomeration-deagglomeration cycles.Type: ApplicationFiled: March 29, 2012Publication date: October 18, 2012Applicants: BASF CORPORATION, BASF SEInventors: Stephan DEUERLEIN, Imme Domke, Alexej Michailovski, Reinhold Rieger, Piyada Charoensirisomboon, David F. Blackwood, Christian Eichholz, Robert Bayer, Dennis Lösch, Igor Shishkov
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Publication number: 20120261606Abstract: A pearlescent pigment and a process for enhancing the magnetic properties of a pearlescent pigment. The pearlescent pigment has a layer with regions of ?-Fe2O3 and regions of ?-Fe2O3. The magnetic properties of a pearlescent pigment may be enhanced by the steps of: providing a platelet pigment with a layer of Fe2O3, with a magnetic susceptibility less than 0.1×10?5 m3/kg; reducing some or all of the Fe2O3 to Fe3O4; and oxidizing some or all of the Fe3O4 to ?-Fe2O3. The color difference (?E*) between the provided pigment and the resultant pigment is not more than about 5.Type: ApplicationFiled: June 26, 2012Publication date: October 18, 2012Inventors: Aaron M. Hollman, Philippe Schottland
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Patent number: 8282853Abstract: A novel NiMnZn-based ferrite which can reduce magnetic loss (core loss) at a high frequency of about 2 MHz or higher and achieve higher saturated magnetic flux density while forming high sintered density is provided. The NiMnZn-based ferrite contains a main component comprising 54.0 to 57.5 mol % of iron oxide in terms of Fe2O3, 2.0 to 7.0 mol % of zinc oxide in terms of ZnO, 0.5 to 4.7 mol % of nickel oxide in terms of NiO, and a remainder of manganese oxide (in terms of MnO); and an accessory component comprising 100 to 1000 ppm by weight of Si in terms of SiO2, 800 to 3000 ppm by weight of Ca in terms of CaCO3, and 520 to 1000 ppm by weight of Nb in terms of Nb2O5 with respect to the main component; while having an average ferrite crystal particle size of 2.1 to 8.5 ?m.Type: GrantFiled: September 22, 2009Date of Patent: October 9, 2012Assignee: TDK CorporationInventors: Kentaro Mori, Takuya Aoki
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Publication number: 20120248368Abstract: This invention relates to a magnetic ceramic material comprising, as main components, (a) at least one magnetic iron oxide selected from the group consisting of Fe3O4 and ?-Fe2O3, and (b) an amorphous phase, and a process for producing a magnetic ceramic material, comprising (1) heating a microorganism-derived iron oxide ceramic material containing an iron atom, and (2) reducing the iron oxide ceramic material obtained in Step (1) by heating in the presence of hydrogen gas.Type: ApplicationFiled: December 14, 2010Publication date: October 4, 2012Inventors: Jun Takada, Hideki Hashimoto, Tatsuo Fujii, Makoto Nakanishi
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Patent number: 8263224Abstract: Disclosed is a resin composition containing a hexagonal ferrite and a resin, which is characterized in that the hexagonal ferrite is contained in an amount of 50-98 parts by weight per 100 parts by weight of the total of the resin composition.Type: GrantFiled: November 28, 2007Date of Patent: September 11, 2012Assignee: Asahi Kasei Chemicals CorporationInventor: Tetsuji Tokiwa
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Patent number: 8246849Abstract: To provide a magnetic powder production method, a magnetic sheet production method, and an antenna module production method that are capable of reducing a size of magnetic particles, achieving thinning and a low loss, and improving magnetic permeability without lowering it. At least two oxide-based magnetic materials are mixed, preliminarily calcined, and pulverized. The pulverized magnetic materials are typically formed into a paste by being dispersed in an organic solvent, and the magnetic materials are applied onto a film after being subjected to defoaming processing. Accordingly, a sheet-like magnetic material is formed. The sheet-like magnetic material is cut into predetermined sizes so as to be fragmented into particles, with the result that magnetic particles are formed.Type: GrantFiled: November 10, 2008Date of Patent: August 21, 2012Assignee: Sony CorporationInventor: Hiraku Akiho
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Publication number: 20120135080Abstract: The invention provides core-shell magnetic particles comprising a magnetic core and a functional shell, methods for making same, methods of separation using same, methods for using same, and devices comprising same. The particles and methods of the invention are useful for targeting and removing substances of interest that may be found in complex mixtures.Type: ApplicationFiled: November 4, 2011Publication date: May 31, 2012Applicant: Massachusetts Institute of TechnologyInventors: Lev E. Bromberg, Emily P. Chang, Trevor Alan Hatton
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Publication number: 20120132847Abstract: A magnetic material composition for ceramic electronic components that is excellent in sintering properties and magnetic properties (in particular, a Q-factor) and a manufacturing method thereof, and a ceramic electronic component using the magnetic material composition are provided. The magnetic material composition includes Ni—Zn—Cu ferrite powder formed of 47.0 to 49.5 parts by mole of a mixture of iron oxide (Fe2O3), cobalt oxide (CoO), and titanium oxide (TiO2), 16.0 to 24.0 parts by mole of nickel oxide (NiO), 18.0 to 25.0 parts by mole of zinc oxide (ZnO), and 7.0 to 13.0 parts by mole of copper oxide (CuO). A ceramic electronic component manufactured using the magnetic material composition has an excellent Q-factor.Type: ApplicationFiled: February 22, 2011Publication date: May 31, 2012Inventors: SUNG YONG AN, Jeoung Wook Kim, Sung Lyoung Kim, Soo Hwan Son, Jin Woo Hahn, Ic Seob Kim
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Publication number: 20120130023Abstract: Composite material comprising—one or more heat-activatable free-radical initiators selected from the group consisting of organic peroxides and/or initiators having labile carbon-carbon bonds and particles which have a core-shell structure and the core of which comprises one or more magnetic materials, while the shell comprises silicon dioxide.Type: ApplicationFiled: May 28, 2010Publication date: May 24, 2012Applicants: UNITED INITIATORS GMBH & CO. KG, EVONIK DEGUSSA GMBHInventors: Harald Herzog, Konrad Rockstein, Stipan Katusic, Martin Kunz, Iris Nagl, Hanno Wolf
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Patent number: 8164410Abstract: A low-loss ferrite comprising as main components 46.5-49.5% by mol of Fe2O3, 17-26% by mol of ZnO, 4-12% by mol of CuO, and 0.2% or more and less than 1.2% by mol of CoO, the balance being NiO, and 0.03-1.4% by mass (as SnO2) of Sn based on 100% by mass of the main components, and having an average crystal grain size of 0.7-2.5 ?m, and an electronic device obtained by integrally sintering pluralities of layers of this low-loss ferrite and coil-shaped electrodes formed in the laminate.Type: GrantFiled: April 16, 2008Date of Patent: April 24, 2012Assignee: Hitachi Metals, Ltd.Inventors: Satoru Tanaka, Takeshi Tachibana
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Publication number: 20120091702Abstract: The present invention is related to magnetic pigments comprising a transparent flaky homogeneously composed substrate having two parallel major surfaces and a coating comprising maghemite, to a process for the production of said pigments as well as to their use.Type: ApplicationFiled: June 8, 2010Publication date: April 19, 2012Applicant: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Kaiman Shimizu, Tamio Noguchi, Fumiko Sasaki, Yukitaka Watanabe, Masahiko Yazawa
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Patent number: 8158018Abstract: 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 has a temperature at which the power loss is a minimal value (bottom temperature) of higher than 120° C. in a magnetic field with an excitation magnetic flux density of 200 mT and a frequency of 100 kHz, and a power loss of 350 kW/m3 or less at the bottom temperature.Type: GrantFiled: March 23, 2009Date of Patent: April 17, 2012Assignee: TDK CorporationInventors: Isao Nakahata, Tomokazu Ishikura, Takuya Aoki
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Publication number: 20120085963Abstract: Disclosed herein are a ferrite composition for a high frequency bead in that a part of Fe in M-type hexagonal ferrite represented by BaFe12O19 is substituted with at least one metal selected from a group consisting of 2-valence, 3-valence and 4-valence metals, as well as a chip bead material using the same. According to embodiments of the present invention, the dielectric composition is characterized in that a part of Fe as a constituent of M-type hexagonal barium ferrite is substituted by other metals, to thus decrease a sintering temperature to 920° C. or less without using any additive for low temperature sintering. Moreover, because of high SRF properties, the inventive composition is applicable to a multilayer type chip bead used at a high frequency of more than several hundreds MHz and a magnetic antenna.Type: ApplicationFiled: October 3, 2011Publication date: April 12, 2012Inventors: Sung Yong AN, Jin Woo HAHN, Jeong Wook KIM, Sung Lyoung KIM, So Yeon SONG, Soo Hwan SON, Ic Seob KIM
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Patent number: 8153097Abstract: A method for manufacturing ferrite powder comprises a step (a) of causing a precursor, obtained by a liquid-phase reaction method, to pass through a sieve with openings of 2 mm or less, and a step (b) of causing free fall, through the interior of a furnace tube heated to the range 750 to 1250° C. by a heater, of the precursor which has passed through the sieve. In the process of causing free fall through the interior of the furnace tube heated by the heater, ferrite powder, which is a single phase of hexagonal ferrite, is obtained by heating the precursor to a prescribed temperature and holding the precursor at the prescribed temperature.Type: GrantFiled: September 25, 2008Date of Patent: April 10, 2012Assignee: TDK CorporationInventor: Mamoru Satoh
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Patent number: 8142676Abstract: The invention relates to a magnetic garnet single crystal and an optical element using the same, for the purpose of providing a magnetic garnet single crystal at a reduced Pb content, and an optical element using the same, where the magnetic garnet single crystal is represented by the chemical formula Bi?M13-?Fe5-?-?M2?M3?O12 (M1 is at least one element selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and M2 is Si; and M3 is at least one element selected from Zn, Ni, Cu and Mg, provided that 0.5<??2.0, 0<?, and 0<y).Type: GrantFiled: February 9, 2007Date of Patent: March 27, 2012Assignee: TDK CorporationInventor: Atsushi Ohido
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Publication number: 20120061609Abstract: A method of assembling superparamagnetic colloids into ordered structures with magnetically tunable photonic properties in nonpolar solvents by establishing long-range electrostatic repulsive forces using charge control agents. Reverse micelles resulted from the introduction of charge control agents such as AOT molecules can enhance the charge separation on the surfaces of n-octadecyltrimethoxysilane modified Fe3O4@SiO2 particles. The significantly improved long-range electrostatic repulsion can counterbalance the magnetically induced attraction and therefore allow ordering of superparamagnetic colloids in nonpolar solvents. This system possesses fast and fully reversible optical response to the external magnetic fields, long-term stability in performance, and good diffraction intensity.Type: ApplicationFiled: February 23, 2010Publication date: March 15, 2012Applicant: The Regents of the University of CaliforniaInventors: Yadong Yin, Jianping Ge
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Patent number: 8133405Abstract: Spinel-type ferrimagnetic particles having a composition represented by the formula: (MO)·n/2(Fe2O3) where M is a divalent metal and n is a molar ratio of Fe to M (n=Fe/M) which is from more than 2.05 to less than 2.5 (2.05<n<2.5). They contain a superparamagnetic component in an amount of not more than 2% by mass, has an average particle diameter of 5 to 30 nm. The particles are respectively coated on surface with a hydroxide of at least one metal Si, Al, P and Zn in an amount of not more than 10% by mass, calculated as the metal. The spinel-type ferrimagnetic particles can exhibit a high coercive force irrespective of fine particles, and are excellent in dispersibility and chemical stability, as well as the magnetic recording medium for high-density recording can exhibit not only excellent frequency characteristics and high output characteristics, but also an excellent weather resistance and a high reliability.Type: GrantFiled: May 13, 2010Date of Patent: March 13, 2012Assignee: Toda Kogyo CorporationInventors: Hiroshi Yamamoto, Tsutomu Katamoto
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Patent number: 8133613Abstract: The present invention relates to nonaqueous electrolyte secondary batteries and durable anode materials and anodes for use in nonaqueous electrolyte secondary batteries. The present invention also relates to methods for producing these anode materials. In the present invention, a metal-semiconductor alloy layer is formed on an anode material by contacting a portion of the anode material with a displacement solution. The displacement solution contains ions of the metal to be deposited and a dissolution component for dissolving a part of the semiconductor in the anode material. When the anode material is contacted with the displacement solution, the dissolution component dissolves a part of the semiconductor in the anode material thereby providing electrons to reduce the metal ions and deposit the metal on the anode material. After deposition, the anode material and metal are annealed to form a uniform metal-semiconductor alloy layer.Type: GrantFiled: April 17, 2008Date of Patent: March 13, 2012Assignee: Enovix CorporationInventors: Murali Ramasubramanian, Robert M. Spotnitz
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Publication number: 20120037840Abstract: Methods and compositions for removing a contaminant from its environment. The method includes forming a magnetic composition comprising the contaminant and an amphiphilic substance, and applying a magnetic field to the magnetic composition so as to separate the magnetic composition from the environment. One composition includes a micelle array confined in a magnetic mesoporous framework. Another composition is formed by adhering an amphiphilic material comprising functional surface groups to a contaminant, then interacting a magnetic material with the functional surface groups of the amphiphilic material. In various versions, the contaminant can be a hydrophobic organic compound, or a fullerene-related nanoparticle. The methods can also be used to purify hydrophobic organic compounds or fullerene-related nanoparticles.Type: ApplicationFiled: February 25, 2009Publication date: February 16, 2012Inventors: Galen Stucky, Arturo A. Keller, Yifeng Shi, Peng Wang, Qihui Shi, Hongjun Liang
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Publication number: 20120007015Abstract: A ferrite material and an electronic component which employs sintered ferrite formed from the ferrite material. The ferrite material is obtained by adding, as minor ingredients, 0.06-0.50 parts by weight of bismuth oxide in terms of Bi2O3, 0.11-0.90 parts by weight of titanium oxide in terms of TiO2, and 0.06-0.46 parts by weight of barium oxide in terms of BaO to a ferrite powder comprising iron oxide, copper oxide, zinc oxide, and nickel oxide as major ingredients. The weight ratio among the bismuth oxide, the titanium oxide, and the barium oxide is as follows: when the proportion of the bismuth oxide in terms of Bi2O3 is taken as 1.00, then the proportion of the titanium oxide in terms of TiO2 is 1.08-2.72 and that of the barium oxide in terms of BaO is 0.72-1.20.Type: ApplicationFiled: March 25, 2010Publication date: January 12, 2012Applicants: NGK Insulators, Ltd., Soshin Electric Co., Ltd.Inventors: Yui Kumura, Yukio Isowaki, Tadashi Otagiri
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Publication number: 20120003689Abstract: A process for making a particulate material comprising mesoporous particles having granules of a metal containing species in at least some of the pores thereof, said process comprising: allowing a compound of the metal to enter pores of hydrophobic mesoporous particles, said compound being thermally decomposable at a decomposition temperature to form a metal containing species and said particles being substantially thermally stable at said decomposition temperature; and heating the hydrophobic mesoporous particles having the compound in the pores thereof to the decomposition temperature so as to decompose the compound and to form the mesoporous particles having granules of the metal containing species in at least some of the pores thereof.Type: ApplicationFiled: November 17, 2008Publication date: January 5, 2012Applicant: Agency for Science, Technology and ResearchInventors: Jackie Y. Ying, Su Seong Lee, Siti Nurhanna Binte Riduan, yu Han
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Publication number: 20110278491Abstract: Disclosed is a MnZnCo-based ferrite consisting of base constituents, accessory constituents, and inevitable impurities, which MnZnCo-based ferrite is characterized by adding silicon oxide (SiO2 conversion): 50-400 mass ppm and calcium oxide (CaO conversion): 1000-4000 mass ppm as secondary constituents to base constituents consisting of iron oxide (Fe2O3 conversion): 51.0-53.0 mol %, zinc oxide (ZnO conversion): greater than 12.0 mol % and less than 18.0 mol %, cobalt oxide (CoO conversion): 0.04-0.60 mol %, and manganese oxide (MnO conversion): remainder, and keeping phosphorus, boron, sulfur, and chlorine of the inevitable impurities to phosphorous: less than 3 mass ppm, boron: less than 3 mass ppm, sulfur: less than 5 mass ppm, and chlorine: less than 10 mass ppm. This MnZnCo-based ferrite has the superior characteristics of always having incremental permeability [mu]? of 2000 or greater across a wide temperature range of ?40 DEG C. to 85 DEG C.Type: ApplicationFiled: January 29, 2010Publication date: November 17, 2011Applicant: JFE CHEMICAL CORPORATIONInventors: Hirofumi Yoshida, Yukiko Nakamura, Satoshi Goto
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Patent number: 7947191Abstract: A composite material composed of nanoparticles of transition metal(s) and magnetic ferric oxide, a method of preparing the same, and uses of the same are provided. The composite material is substantially composed of nanoparticles of transition metal(s) or alloy thereof and nanoparticles of magnetic ferric oxide, the size of nanoparticles of transition metal(s) or alloy thereof is in the range of 0.7 to 5 nm, the size of nanoparticles of magnetic ferric oxide is in the range of 5 to 50 nm, and the amount of transition metal(s) or alloy thereof is in the range of 0.1 to 30 wt %, based on the total weight of composite material, the magnetic ferric oxide is gamma-Fe2O3, Fe3O4, complex obtained from gamma-Fe2O3 by partial reduction, or complex obtained from Fe3O4 by partial reduction.Type: GrantFiled: October 12, 2005Date of Patent: May 24, 2011Assignee: Peiking UniversityInventors: Yuan Wang, Junling Zhang, Minghui Liang, Xiaodong Wang, Yongge Wei, Linlin Gui
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Patent number: 7922917Abstract: Porous, ferro- or ferrimagnetic, glass particles are described that selectively bind molecules of interest, especially nucleic acid molecules, under appropriate conditions. Methods of preparing the porous, ferro- or ferrimagnetic, glass particles and their use for identifying or separating molecules of interest are also described. Kits comprising the porous, ferro- or ferrimagnetic, glass particles are also provided.Type: GrantFiled: December 7, 2006Date of Patent: April 12, 2011Assignee: QIAGEN GmbHInventors: Philippe Sauer, Bernd Springer, Thomas Manz, Christoph Ritt, Roland Fabis
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Patent number: 7892446Abstract: A ferrite material in which Bi2O3 is added at 6% by weight or less, and preferably 4% by weight or less, to a ferrite of Li—Zn—(Mn, Fe) containing a specified amount of Mn. In the ferrite material, change of magnetic permeability under high external stress is extremely small, and a core loss under a compression stress is small. By using this ferrite material, an inductor and transformer having small loss even in a state of being molded with resin can be obtained.Type: GrantFiled: September 12, 2006Date of Patent: February 22, 2011Assignee: Hitachi Metals, Ltd.Inventors: Yasuharu Miyoshi, Tomoyuki Tada
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Patent number: 7883637Abstract: A composite sintered body of dielectric substance and magnetic substance comprises a hexagonal Ba ferrite crystal, a perovskite type crystal containing at least one element selected from Ca, Sr, and Ba, and Ti, and Li element, and the relative magnetic permeability is 1.4 or more at 1 GHz. LC composite electronic component comprises the composite sintered body, a condenser circuit formed in the inside or the surface of the composite sintered body, and an inductor circuit formed in the inside or the surface of the composite sintered body.Type: GrantFiled: December 21, 2007Date of Patent: February 8, 2011Assignee: Kyocera CorporationInventors: Hirofumi Terazono, Takeshi Matsui
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Publication number: 20110006247Abstract: Hydrophobized silicon-iron mixed oxide powder, characterized in that it has the following physicochemical characteristics: BET surface area 20 to 75 mVg; Carbon content 0.5 to 10% by weight; Tamped density 150 to 600 g/l; Chlorine content 0.1 to 3.0%; Drying loss 0.1 to 4% by weight; DVS isotherm (60%) 0.5 to 1.5% by weight; Heating rate (Is, 10%) 50 to 550° C./s; 90% range (number) 5 to 50 nm; 90% range (weight) 5 to 150 nm; Overall range 2 to 200 nm, is prepared by treating a silicon-iron mixed oxide powder with the surface modifier either in spray form or in vapour form, and then heat treating it. The surface-modified oxidic particles can be used as a filler in adhesives. Further fields of use are use for data carriers, as a contrast agent in imaging processes, for biochemical separation and analysis processes, for medical applications, as an abrasive, as a catalyst or as a catalyst support, as a thickener, for thermal insulation, as a dispersing aid, as a flow aid and in ferrofluids.Type: ApplicationFiled: March 30, 2009Publication date: January 13, 2011Applicant: EVONIK DEGUSSA GMBHInventors: Stipan Katusic, Juergen Meyer
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Patent number: 7837893Abstract: A sintered ferrite magnet having an M-type ferrite structure and comprising Ca, an R element which is at least one rare earth element indispensably including La, Ba, Fe and Co as indispensable elements, which is represented by Ca1-x-yRxBayFe2n-zCoz, wherein (1-x-y), x, y, z and n are numbers representing the amounts of Ca, the R element, Ba and Co and a molar ratio, meeting 0.2?x?0.65, 0.001?y?0.2, 0.03?z?0.65, and 4?n?7.Type: GrantFiled: March 10, 2006Date of Patent: November 23, 2010Assignee: Hitachi Metals, Ltd.Inventors: Takashi Takami, Hiroshi Iwasaki, Naoki Mochi
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Patent number: 7837807Abstract: A magnetic core for a current transformer, and a current transformer and a watt hour meter used thereof, which is preferred the detection of a alternate current with a large asymmetrical waveform and a alternate current which a direct current is superimposed are realized. A magnetic core for a current transformer comprising the composition represented by the general formula: Fe100-x-a-y-cMxCuaM?yX?c (atomic %), wherein M is at least one element selected from Co and Ni, M? is at least one element selected from V, Ti, Zr, Nb, Mo, Hf, Ta, X? is at least one element selected from Si and B, and x, a, y, and c meets the composition of 3?x?50, 0.1?a?3, 1?y?10, 2?c?30, and also 7?y+c?30, and an alloy comprising a crystal grain consisting of at least a part or all of the composition with a mean particle size of less than or equal to 50 nm.Type: GrantFiled: March 19, 2007Date of Patent: November 23, 2010Assignee: Hitachi Metals, Ltd.Inventor: Yoshihito Yoshizawa
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Publication number: 20100288964Abstract: Methods of producing a multiferroic thin film material. The method includes the steps of providing a multiferroic precursor solution, subjecting the precursor solution to spin casting to produce a spin cast film, and heating the spin cast film. The precursor solution may include Bi(NO3)3.5H2O and Fe(NO3)3.9H2O in ethylene glycol to produce a bismuth ferrite film. Further, the thin film may be utilized in varied technological areas, including memory devices for information storage.Type: ApplicationFiled: May 10, 2010Publication date: November 18, 2010Inventors: Ronald Pirich, Nan-Loh Yang, Kai Su, I-Wei Chu
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Patent number: 7811465Abstract: The present invention relates to a magnetic garnet single crystal prepared by the liquid phase epitaxial (LPE) process and an optical element using the same as well as a method of producing the single crystal, for the purpose of providing a magnetic garnet single crystal at a reduced Pb content and an optical element using the same, as well as a method of producing the single crystal. The magnetic garnet single crystal is grown by the liquid phase epitaxial process and is represented by the chemical formula BixNayPbzM13?x?y?zFe5?wM2wO12 (M1 is at least one element selected from Y, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and M2 is at least one element selected from Ga, Al, In, Ti, Ge, Si and Pt, provided that 0.5<x?2.0, 0<y?0.8, 0?z<0.01, 0.19?3?x?y?z<2.5, and 0?w?1.6).Type: GrantFiled: November 17, 2005Date of Patent: October 12, 2010Assignee: TDK CorporationInventor: Atsushi Ohido
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Patent number: 7758766Abstract: It is an object of the present invention to provide a magnetic garnet single crystal capable of reducing the optical loss of the resulting rotator even when the magnetic garnet single crystal is grown using a solvent containing Na by the liquid phase epitaxial process, as well as a Faraday rotator using the same. A magnetic garnet single crystal represented by the chemical formula Bi?Na?M13-?-?-?M2?Fe5-?-?Mg?M3?O12 (M1 is at least one element or more selected from Y, Eu, Gd, Tb, Dy, Ho, Yb and Lu; and M2 is at least one element or more selected from Ca and Sr; M3 is at least one element or more selected from Si, Ge, Ti, Pt, Ru, Sn, Hf and Zr, provided that 0.60<??1.50, 0<??0.05, 1.35<3??????<2.40, 0???0.10, 0???0.10, 0<??0.10, 0<?+??0.10, 0<?+??0.10).Type: GrantFiled: September 17, 2007Date of Patent: July 20, 2010Assignee: TDK CorporationInventor: Atsushi Ohido
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Patent number: 7754094Abstract: 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 (1) of Rcal=[200(X?50)]/(3X), and the ratio R (%) of Fe2+ per the total amount of Fe in the sintered body meeting the condition of Rcal?2.0?R?Rcal+0.3; and the sintered body having a density of 4.9 g/cm3 or more.Type: GrantFiled: December 24, 2004Date of Patent: July 13, 2010Assignee: Hitachi Metals Ltd.Inventors: Masahiro Takahashi, Syuichi Takano
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Publication number: 20100171066Abstract: Disclosed is a magnetic material having high Hc and High Curie point, which is capable of controlling such magnetic characteristics without requiring rare or expensive raw materials. Specifically disclosed is a magnetic material composed of particles of a magnetic iron oxide which is represented by the following general formula: ?-AxByFe2?x?yO3 or ?-AxByCzFe2?x?y?zO3 (wherein A, B and C each represents a metal excluding Fe and different from each other, satisfying 0<x, y, z<1), with ?-Fe2O3 as a main phase.Type: ApplicationFiled: May 30, 2008Publication date: July 8, 2010Applicants: The University of Tokyo, Dowa Electronics Materials Co., Ltd.Inventors: Shin-ichi Ohkoshi, Shunsuke Sakurai, Takenori Yorinaga, Kazuyuki Matsumoto, Shinya Sasaki
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Publication number: 20100140535Abstract: A method of manufacturing magnetic material is described hereinafter. Firstly, Fe(NO3)3.9H2O and other metal nitrate compounds are dissolved in an alcohol solvent to form a mixed solution. Secondly, the mixed solution is heated to 60˜100 degrees Centigrade. Next, citric acid is added into the mixed solution for being reacted with each other under the temperature of 60˜100 degrees Centigrade so that can make the alcohol solvent volatilized and further obtain brown solid powder. Lastly, the solid powder is further heated for a period of time so as to obtain the magnetic material having a fluffy powdery form.Type: ApplicationFiled: December 10, 2008Publication date: June 10, 2010Inventor: Chih-Hao HUANG
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Publication number: 20100124644Abstract: An article and thermoplastic composition including polycarbonate, a polysiloxane-polycarbonate and an x-ray detectable or metal detectable agent having good magnetic permeability and/or electrical conductivity wherein the composition may be used in articles for food preparation. The thermoplastic compositions are useful in forming molds for manufacturing a food product, such as chocolate molds.Type: ApplicationFiled: September 30, 2009Publication date: May 20, 2010Applicant: SABIC INNOVATIVE PLASTICS IP B.V.Inventors: Christopher Luke Hein, Jan-Pleun Lens, Vandita Pai-Paranjape, Constant Peek, Robert Dirk van de Grampel
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Patent number: 7713433Abstract: W-type ferrite has improved magnetic properties, in particular, coercive force. A high coercive force (HcJ) and a high residual magnetic flux density (Br) can be simultaneously attained by a ferrite magnetic material comprising an oxide having a composition wherein metal elements Sr, Ba and Fe in total have a composition ratio represented by the formula Sr(1?x)BaxFe2+aFe3+b in which 0.03 ?x?0.80, 1.1?a?2.4, and 12.3?b?16.1. The ferrite magnetic material can form any of a ferrite sintered magnet, a ferrite magnet powder, a bonded magnet as a ferrite magnet powder dispersed in a resin, and a magnetic recording medium as a film-type magnetic phase. As for the ferrite sintered magnet, there can be attained a fine sintered structure that has a mean grain size of 0.6 ?m or less.Type: GrantFiled: March 3, 2005Date of Patent: May 11, 2010Assignee: TDK CorporationInventors: Yoshihiko Minachi, Noboru Ito, Junichi Nagaoka, Shunsuke Kurasawa, Taku Murase
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Publication number: 20100085140Abstract: A low-loss ferrite comprising as main components 46.5-49.5% by mol of Fe2O3, 17-26% by mol of ZnO, 4-12% by mol of CuO, and 0.2% or more and less than 1.2% by mol of CoO, the balance being NiO, and 0.03-1.4% by mass (as SnO2) of Sn based on 100% by mass of the main components, and having an average crystal grain size of 0.7-2.5 ?um, and an electronic device obtained by integrally sintering pluralities of layers of this low-loss ferrite and coil-shaped electrodes formed in the laminate.Type: ApplicationFiled: April 16, 2008Publication date: April 8, 2010Applicant: Hitachi Metals, Ltd.Inventors: Satoru Tanaka, Takeshi Tachibana
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Publication number: 20090242827Abstract: 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 has a temperature at which the power loss is a minimal value (bottom temperature) of higher than 120° C. in a magnetic field with an excitation magnetic flux density of 200 mT and a frequency of 100 kHz, and a power loss of 350 kW/m3 or less at the bottom temperature.Type: ApplicationFiled: March 23, 2009Publication date: October 1, 2009Applicant: TDK CorporationInventors: Isao NAKAHATA, Tomokazu Ishikura, Takuya Aoki
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Publication number: 20090140384Abstract: A thin soft magnetic film combines a high magnetization with an insulating character. The film is formed by nitriding Fe-rich ferromagnetic nanograins immersed in an amorphous substrate. A selective oxidation of the amorphous substrate is then performed. The result is a thin, insulating, soft magnetic film of high magnetization. Many types of integrated circuits can be made which include a component using a membrane incorporating the above-mentioned thin film.Type: ApplicationFiled: February 9, 2009Publication date: June 4, 2009Applicants: STMicroelectronics S.A., Commissariat a L'Energie Atomique Batiment LE PONAND DInventors: Guillaume Bouche, Pascal Ancey, Bernard Viala, Sandrine Couderc
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Patent number: 7540972Abstract: 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 mol % or less (inclusive of 0 mol %), and the balance: MnO; and as additives, Co: 0.15 to 0.65% by weight in terms of Co3O4, Si: 0.01 to 0.045% by weight in terms of SiO2 and Ca: 0.05 to 0.40% by weight in terms of CaCO3; wherein the ? value (the cation defect amount) defined in the present specification satisfies the relation 3×10?3???7×10?3; and the mean grain size is larger than 8 ?m and 15 ?m or less.Type: GrantFiled: January 23, 2007Date of Patent: June 2, 2009Assignee: TDK CorporationInventors: Tomokazu Ishikura, Shinichi Sakano, Masahiko Watanabe
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Patent number: 7527744Abstract: An NiCuZn-base ferrite of the invention comprises as main components an iron oxide in an amount of 45.0 to 49.0 mol % on Fe2O3 basis, an copper oxide in an amount of 5.0 to 14.0 mol % on CuO basis and a zinc oxide in an amount of 1.0 to 32.0 mol % on ZnO basis with a nickel oxide accounting for the rest mol % on NiO basis. With respect to the main components, a bismuth oxide is contained in an amount of 0.25 exclusive to 0.40% by weight on Bi2O3 basis, and a tin oxide is contained in an amount of 1.00 to 2.50% by weight on SnO2 basis. The invention ensures a leap upward in direct-current bias characteristics.Type: GrantFiled: August 30, 2006Date of Patent: May 5, 2009Assignee: TDK CorporationInventors: Ryuichi Wada, Takuya Aoki, Hiroshi Momoi, Yukio Takahashi, Takahiro Satoh
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Publication number: 20090050839Abstract: The present invention relates to a metal oxide nano-composite magnetic material, fabrication method, and method for linkage, enrichment, and isolation of phosphorylated species. The metal oxide nano-composite magnetic material comprises the magnetic iron oxide nanoparticle, a silica layer immobilized onto the magnetic iron oxide nanoparticle and a metal oxide layer coated onto the silica layer. The magnetic iron oxide nanoparticles can be used for absorbing microwave radiation to accelerate the enrichment and linkage for phosphorylated species onto the metal oxide nano-composite magnetic material. Furthermore, the magnetic property of magnetic iron oxide nanoparticles leads to isolation of the metal oxide nano-composite magnetic material-target species conjugates by simply employing an external magnetic field.Type: ApplicationFiled: April 11, 2008Publication date: February 26, 2009Applicant: NATIONAL CHIAO TUNG UNIVERSITYInventors: YU-CHIE CHEN, CHENG-TAI CHEN, WEI-YU CHEN, CHUN-YUEN LO, HONG-YI LIN, CHIH CHI LIU