With Group I Metal Patents (Class 252/62.6)
  • Patent number: 9536645
    Abstract: A ferrite composition comprises a main component and a sub component. The main component is comprised of 40.0 to 49.8 mol % iron oxide in terms of Fe2O3, 5.0 to 14.0 mol % copper oxide in terms of CuO, 0 to 32.0 mol % zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The sub component includes 0.5 to 4.0 wt % tin oxide in terms of SnO2, 0.10 to 1.00 wt % bismuth oxide in terms of Bi2O3, and 0.21 to 3.00 wt % cobalt oxide in terms of Co3O4, with respect to the main component.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: January 3, 2017
    Assignee: TDK CORPORATION
    Inventors: Ryuichi Wada, Kouichi Kakuda, Yukari Akita, Yukio Takahashi, Yusuke Nagai, Takashi Suzuki, Takahiro Sato
  • Patent number: 9514871
    Abstract: Provided is a sintered ferrite magnet 10 that comprises Sr ferrite having a hexagonal crystal structure, wherein the total amount of Na and K is 0.004 to 0.31% by mass in terms of Na2O and K2O, an amount of Si is 0.3 to 0.94% by mass in terms of SiO2, and the following Expression (1) is satisfied. 1.3?(SrF+Ba+Ca+2Na+2K)/Si?5.7??(1) [In Expression (1), SrF represents an amount of Sr, on a molar basis, other than Sr which constitutes the Sr ferrite, and Ba, Ca, Na, and K represent amounts of respective elements on a molar basis.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: December 6, 2016
    Assignee: TDK Corporation
    Inventor: Hitoshi Taguchi
  • Patent number: 9460835
    Abstract: Provided is a sintered ferrite magnet 10 that contains Sr ferrite having a hexagonal crystal structure, wherein the total amount of Na and K is 0.01 to 0.09% by mass in terms of Na2O and K2O, an amount of Si is 0.1 to 0.29% by mass in terms of SiO2, and the following Expression (1) is satisfied. 2.5?(SrF+Ba+Ca+2Na+2K)/Si?5.4??(1) [In Expression (1), SrF represents an amount of Sr, on a molar basis, other than Sr which constitutes the Sr ferrite, and Ba, Ca, Na, and K represent amounts of respective elements on a molar basis.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: October 4, 2016
    Assignee: TDK CORPORATION
    Inventor: Hitoshi Taguchi
  • Patent number: 9394204
    Abstract: The present invention relates to a molded ferrite sheet having opposing surfaces and a thickness in a range of 30 ?m to 430 ?m, at least one surface of said opposing surfaces having the following surface roughness characteristics (a) to (c): (a) a center line average roughness is in a range of 170 nm to 800 nm, (b) a maximum height is in a range of 3 ?m to 10 ?m, and (c) an area occupancy rate of cross-sectional area taken along a horizontal plane at a depth of 50% of the maximum height in a square of side 100 ?m is in a range of 10 to 80%.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: July 19, 2016
    Assignee: TODA KOGYO CORPORATION
    Inventors: Tetsuya Kimura, Tomohiro Dote, Kazumi Yamamoto, Takanori Doi, Yoji Okano
  • Patent number: 9245680
    Abstract: There is provided a common mode choke coil in which a non-magnetic layer and a second magnetic layer stacked on a first magnetic layer and two facing conductive coils are included in the non-magnetic layer, the non-magnetic layer is formed of sintered glass ceramics, the conductive coils and are formed of a conductor containing copper, and at least one of the first magnetic layer and the second magnetic layer is formed of a sintered ferrite material containing Fe2O3, Mn2O3, NiO, ZnO and CuO. The sintered ferrite material has an Fe2O3-reduced content of 25 to 47 mol % and a Mn2O3-reduced content of 1 to 7.5 mol %, or Fe2O3-reduced content of 35 to 45 mol % and a Mn2O3-reduced content of 7.5 to 10 mol %, and a CuO reduced content of 5 mol %.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: January 26, 2016
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Miho Kitamura, Hayami Kudo, Atsushi Yamamoto, Akihiro Nakamura
  • Publication number: 20150097137
    Abstract: A ferrite composition comprises a main component and a sub component. The main component is comprised of 25.0 to 49.8 mol % iron oxide in terms of Fe2O3, 5.0 to 14.0 mol % copper oxide in terms of CuO, 0 to 40.0 mol % zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The sub component includes 0.2 to 5.0 wt % silicon oxide in terms of SiO2, 0.10 to 3.00 wt % bismuth oxide in terms of Bi2O3, and 0.10 to 3.00 wt % cobalt oxide in terms of Co3O4, with respect to the main component.
    Type: Application
    Filed: October 6, 2014
    Publication date: April 9, 2015
    Inventors: Ryuichi WADA, Kouichi KAKUDA, Hiroki CHOTO, Yukari AKITA, Yukio TAKAHASHI, Masahiro ENDO, Takashi SUZUKI, Takahiro SATO, Akinori OHI
  • Publication number: 20150061816
    Abstract: There are provided a magnetic composition including a glass component capable of not reacting with a ferrite grain but being uniformly distributed only in a grain boundary, instead of using an existing glass component, thereby achieving improved permeability, specific resistance and high frequency specific resistance, and a multilayer electronic component manufactured by using the same.
    Type: Application
    Filed: November 19, 2013
    Publication date: March 5, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Bum Suk KANG, Young Il LEE, Hee Sang KANG, Byeong Cheol MOON, Hew Young KIM, Chang Joo LEE
  • Publication number: 20150053883
    Abstract: Provided is a sintered ferrite magnet 10 that contains Sr ferrite having a hexagonal crystal structure, wherein the total amount of Na and K is 0.01 to 0.09% by mass in terms of Na2O and K2O, an amount of Si is 0.1 to 0.29% by mass in terms of SiO2, and the following Expression (1) is satisfied. 2.5?(SrF+Ba+Ca+2Na+2K)/Si?5.4??(1) [In Expression (1), SrF represents an amount of Sr, on a molar basis, other than Sr which constitutes the Sr ferrite, and Ba, Ca, Na, and K represent amounts of respective elements on a molar basis.
    Type: Application
    Filed: February 20, 2013
    Publication date: February 26, 2015
    Inventor: Hitoshi Taguchi
  • Patent number: 8920670
    Abstract: A magnetic material of an embodiment includes: first magnetic particles that contain at least one magnetic metal selected from the group including Fe, Co, and Ni, are 1 ?m or greater in particle size, and are 5 to 50 ?m in average particle size; second magnetic particles that contain at least one magnetic metal selected from the group including Fe, Co, and Ni, are smaller than 1 ?m in particle size, and are 5 to 50 nm in average particle size; and an intermediate phase that exists between the first magnetic particles and the second magnetic particles.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: December 30, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koichi Harada, Tomohiro Suetsuna, Toshihide Takahashi, Seiichi Suenaga
  • Publication number: 20140346387
    Abstract: Embodiments disclosed herein relate to using cobalt (Co) to fine tune the magnetic properties, such as permeability and magnetic loss, of nickel-zinc ferrites to improve the material performance in electronic applications. The method comprises replacing nickel (Ni) with sufficient Co+2 such that the relaxation peak associated with the Co+2 substitution and the relaxation peak associated with the nickel to zinc (Ni/Zn) ratio are into near coincidence. When the relaxation peaks overlap, the material permeability can be substantially maximized and magnetic loss substantially minimized. The resulting materials are useful and provide superior performance particularly for devices operating at the 13.56 MHz ISM band.
    Type: Application
    Filed: August 5, 2014
    Publication date: November 27, 2014
    Inventors: Michael David Hill, David Bowie Cruickshank, Kelvin M. Anderson
  • Patent number: 8889029
    Abstract: A ferrite sintered body having an improved strength and a noise filter including the same are provided. A ferrite sintered body includes 1 mol % to 10 mol % Cu on CuO basis, a spinel-structured crystal containing Fe, Zn, Ni, Cu and O as a main phase, and Cu compound particles present at a grain boundary, having an average particle diameter of 0.5 ?m to 10 ?m. The ferrite sintered body includes the Cu compound particles present at a grain boundary. It is thereby possible to suppress the grain growth of the crystals serving as the main phase to attain a morphology formed of fine crystals, and also inhibit the propagation of destruction of the grain boundary, thus making it possible to achieve a ferrite sintered body with an improved strength.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: November 18, 2014
    Assignee: Kyocera Corporation
    Inventor: Hidehiro Takenoshita
  • Patent number: 8845920
    Abstract: The present invention relates to a composition comprising at least one transparent thermoplastic material; at least one inorganic IR absorber which comprises a zinc-doped caesium tungstate; and optionally at least one stabilizer which is based on phosphine. The present invention also relates to a composition which comprises a thermoplastic polymer material, an inorganic IR absorber, at least one phosphine stabilizer, at least one phosphite stabilizer, and at least one phenolic antioxidant stabilizer.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: September 30, 2014
    Assignee: Bayer MaterialScience AG
    Inventor: Alexander Meyer
  • Publication number: 20140176285
    Abstract: A ceramic electronic component includes a magnetic section composed of a ferrite material and a coil conductor containing Cu as its main constituent. The magnetic section is formed from Ni—Cu—Zn ferrite which falls within the range specified by (x, y)=A (25, 1), B (47, 1), C (47, 7.5), D (46, 7.5), E (46, 10), F (30, 10), G (30, 7.5), and H (25, 7.5) when the molar content x of Fe2O3 and the molar content y of Mn2O3 are represented by (x, y). A CuO molar content of 0.5 to 10.0 mol %, a ZnO content of 1.0 to 35.0 mol %, a MgO content of 5.0 to 35.0 mol %, and NiO as the balance is present. Even when co-firing with a conductive material containing Cu as its main constituent, insulation properties are ensured, favorable electrical properties are achieved, and a ceramic electronic component is achieved.
    Type: Application
    Filed: February 27, 2014
    Publication date: June 26, 2014
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Akihiro NAKAMURA, Atsushi YAMAMOTO
  • Publication number: 20140070130
    Abstract: A ferrite magnet with salt includes 40 to 99.9 weight % of ferrite and 0.1 to 60 weight % of salt, wherein the salt has a melting point lower than a synthetic temperature of the ferrite, and the salt is melted to form a matrix between the ferrite particles, and a manufacturing thereof. The ferrite magnet with salt has advantages in terms of process conditions due to fast synthesis reaction at low temperatures compared to typical magnets, easily obtaining nano-sized particles having high crystallinity, preventing cohesion between particles and particle growth by molten salt, allowing sintering at temperatures lower than typical during the molding and sintering processes for producing a ferrite magnet with salt due to synthesized ferrite magnetic powder with salt thus preventing the deterioration of magnetic characteristics due to particle growth, and allowing alignment in the direction of magnetization easy axis to obtain higher magnetic characteristics.
    Type: Application
    Filed: August 8, 2013
    Publication date: March 13, 2014
    Applicants: Industry-University Cooperation Foundation Hanyang University ERICA Campus, LG ELECTRONICS INC.
    Inventors: Namseok KANG, Jinbae KIM, Yongho CHOA, Jongyoul KIM, Gukhwan AN, Sanggeun CHO
  • Publication number: 20130292602
    Abstract: Embodiments and aspects of the present invention relate to an enhanced hexagonal ferrite magnetic material doped with an alkali metal. The material retains substantial magnetic permeability up to frequencies in the GHz range with low losses. The material may be used in high frequency applications in devices such as transformers, inductors, circulators, and absorbers.
    Type: Application
    Filed: July 3, 2013
    Publication date: November 7, 2013
    Inventor: Michael D. Hill
  • Patent number: 8562851
    Abstract: 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: Grant
    Filed: March 25, 2010
    Date of Patent: October 22, 2013
    Assignees: Soshin Electric Co., Ltd., NGK Insulators, Ltd.
    Inventors: Yui Kumura, Yukio Isowaki, Tadashi Otagiri
  • Patent number: 8545713
    Abstract: The present invention relates to black magnetic iron oxide particles comprising magnetite as a main component, wherein when the black magnetic iron oxide particles are molded into a tablet shape, an electric resistance value of the tablet in an alternating current electric field is controlled to produce an impedance of not less than 2×106 ?cm as measured in a characteristic frequency range thereof. The black magnetic iron oxide particles according to the present invention can provide a toner capable of exhibiting a good charging performance and a uniform charging property under the high-temperature and high-humidity conditions, so that when developing an electrostatic latent image therewith, it is possible to obtain toner images having a high resolution or definition, and further the use of heavy metal elements in the black magnetic iron oxide particles can be minimized.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: October 1, 2013
    Assignee: Toda Kogyo Corporation
    Inventors: Ryo Iwai, Mamoru Kamigaki, Nobuya Shimo, Naoki Uchida
  • Publication number: 20130169488
    Abstract: A new magnetic substance having a high magnetic permeability and a low magnetic permeability loss over a wide frequency bandwidth, a composite material for antennas using the new magnetic substance and a polymer, and an antenna using the composite material for antennas.
    Type: Application
    Filed: September 6, 2012
    Publication date: July 4, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jun-sig KUM, Nak-hyun KIM, Hyun-jin KIM, Seung-kee YANG, Joong-hee LEE
  • Patent number: 8470194
    Abstract: A Ni—Zn—Cu ferrite material having excellent DC bias characteristics is provided by adding zinc silicate thereto. The above problem can be solved by Ni—Zn—Cu ferrite particles which comprise a spinel-type ferrite and zinc silicate, which have a composition comprising 36.0 to 48.5 mol % of Fe2O3, 7.0 to 38 mol % of NiO, 4.5 to 40 mol % of ZnO, 5.0 to 17 mol % of CuO and 1.0 to 8.0 mol % of SiO2, all amounts being calculated in terms of the respective oxides, and which have a ratio of an X-ray diffraction intensity from a 113 plane of the zinc silicate to an X-ray diffraction intensity from a 311 plane of the spinel-type ferrite is 0.01 to 0.12; a green sheet obtained by forming a material comprising the Ni—Zn—Cu ferrite particles into a film; and a Ni—Zn—Cu ferrite sintered ceramics.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: June 25, 2013
    Assignee: Toda Kogyo Corporation
    Inventors: Yoji Okano, Tomohiro Dote, Norio Sugita
  • Publication number: 20130126394
    Abstract: The present invention provides a method of preparing an iron oxide magnetic nanoparticle, comprising the steps of: i) reacting a water-soluble ferrous salt with a water-soluble ferric salt in a mole ratio of 1:2 in the presence of a base and a citrate to give an iron oxide particle surface-coated with the citrate (c-MNP); ii) reacting the c-MNP obtained in step (i) with a thiophilic compound to give a thiophilic compound-bounded iron oxide particle surface-coated with the citrate (thiophilic-c-MNP); and iii) modifying the thiophilic-c-MNP obtained in step (ii) using a surfactant for phase transfer of the thiophilic-c-MNP from aqueous phase to organic phase. The present invention also relates to the iron oxide magnetic nanoparticle prepared by the above-mentioned method and the use of the nanoparticle in desulfurization. The iron oxide magnetic nanoparticle of the present invention is capable of effective deep desulfurization.
    Type: Application
    Filed: November 8, 2012
    Publication date: May 23, 2013
    Applicant: NANOPETRO COMPANY LIMITED
    Inventor: NANOPETRO COMPANY LIMITED
  • Publication number: 20130062553
    Abstract: Disclosed herein are a nickel-zinc-copper (NiZnCu) based ferrite composition containing 0.001 to 0.3 parts by weight of bivalent metal, 0.001 to 0.3 parts by weight of trivalent metal, and 0.001 to 0.5 parts by weight of tetravalent metal based on 100 parts by weight of main component containing 47.0 to 50.0 mol % of Fe2O3, 15.0 to 27.0 mol % of NiO, 18.0 to 25.0 mol % of ZnO, and 7.0 to 13.0 mol % of CuO, and a multilayered chip device and a toroidal core using the same. According to exemplary embodiments of the present invention, a bivalent metal, a trivalent metal, and a tetravalent are contained in a NiZuCu ferrite, thereby making it possible to provide a ferrite composition having excellent quality factor (Q) characteristics. Moreover, it is possible to provide a toroidal core and a multilayered chip device having excellent sinterability, permittivity, and quality factor (Q) characteristics using the ferrite composition.
    Type: Application
    Filed: September 6, 2012
    Publication date: March 14, 2013
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Myeong Gi Kim, Sung Yong An, Ic Seob Kim
  • Publication number: 20130057375
    Abstract: This disclosure provides a ferrite ceramic composition, a ceramic electronic component including the ceramic composition, and a process of producing a ceramic electronic component including the ferrite ceramic composition, of which the insulation performance can be secured even when fired simultaneously with a metal wire material containing Cu as the main component, and which can have good electric properties. The ferrite ceramic composition includes an Ni—Mn—Zn-based ferrite having a molar content of CuO of 5 mol % or less and in which, when the molar content (x) of Fe2O3 and the molar content (y) of Mn2O3 are expressed by a coordinate point (x,y), the coordinate point (x,y) is located in an area bounded by coordinate points A (25,1), B (47,1), C (47,7.5), D (45,7.5), E (45,10), F (35,10), G (35,7.5) and H (25,7.5).
    Type: Application
    Filed: August 31, 2012
    Publication date: March 7, 2013
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Tomoyuki ANKYU, Atsushi YAMAMOTO, Yuko NOMIYA, Wataru KANAMI
  • Patent number: 8343375
    Abstract: A ferrite powder for producing a ferrite sintered body is provided, the ferrite powder having a median diameter D50 [?m] in a range from 0.1 to 0.8 ?m, a degree of spinel formation in a range from 45 to 90%, and a remanent magnetization Br per unit mass [emu/g] satisfying the following formula after application of the maximum magnetic field of 15 kOe: 0.05?Br?2.0(ln.D50)+6.3. This ferrite powder produces a homogeneous ferrite sintered body having very few cracks by gel casting.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: January 1, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Nobuyuki Kobayashi, Shuichi Ozawa, Kei Sato
  • Publication number: 20120251844
    Abstract: An aspect of the present invention relates to magnetic recording powder, which comprises hexagonal ferrite magnetic particles, the hexagonal ferrite magnetic particle comprising 0.5 to 5.0 atomic percent of an Fe substitution element in the form of just a divalent element per 100 atomic percent of a content of Fe and having an activation volume ranging from 1,200 to 1,800 nm3.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 4, 2012
    Applicant: FUJIFILM CORPORATION
    Inventors: Nobuo YAMAZAKI, Toshio TADA, Hiroyuki SUZUKI
  • Publication number: 20120225264
    Abstract: A magnetic fluid composition include a suspension of nano-particles including cross-crystallized multi-metal compounds dispersed in a solvent, the cross-crystallized multi-metal compounds including at least two or more metals having different valencies or oxidation states, the metals selected from the group consisting of a monovalent metal (Me+), a divalent metal (Me2+), a trivalent metal (Me3+), a quadrivalent metal (Me4+) and a rare earth metal. The magnetic fluid having a viscosity and surface tension that permits dispensing from an inkjet printer at a rate of at least 2.5 m/s, at a resolution of at least 600 dpi, supporting jetting pulse frequencies of at least 15 KHz per nozzle (enabling high speed inkjet printing applications of at least 0.6 m/sec per individual nozzle row per print head), and enabling uninterrupted, industrial level print output of magnetic ink character recognition (MICR) code lines suitable for high speed magnetic data scanning per established industry regulations (ANSI X9).
    Type: Application
    Filed: March 1, 2012
    Publication date: September 6, 2012
    Inventor: Thomas Villwock
  • Publication number: 20120068103
    Abstract: Embodiments disclosed herein relate to using cobalt (Co) to fine tune the magnetic properties, such as permeability and magnetic loss, of nickel-zinc ferrites to improve the material performance in electronic applications. The method comprises replacing nickel (Ni) with sufficient Co+2 such that the relaxation peak associated with the Co+2 substitution and the relaxation peak associated with the nickel to zinc (Ni/Zn) ratio are into near coincidence. When the relaxation peaks overlap, the material permeability can be substantially maximized and magnetic loss substantially minimized. The resulting materials are useful and provide superior performance particularly for devices operating at the 13.56 MHz ISM band.
    Type: Application
    Filed: September 22, 2011
    Publication date: March 22, 2012
    Applicant: SKYWORKS SOLUTIONS, INC.
    Inventors: Michael David Hill, David Bowie Cruickshank, Kelvin M. Anderson
  • Publication number: 20120018663
    Abstract: Disclosed are a ferrite for high-frequency applications and a manufacturing method thereof. The ferrite comprises the elements Mg, Cu, Fe, and O, in which the elements have a composition ratio represented by the formula Mg1-xCuxFe2O4, wherein x has a value of 0.1 or less.
    Type: Application
    Filed: November 18, 2009
    Publication date: January 26, 2012
    Inventors: Byung Hoon Ryou, Won Mo Sung, Sang Hoon Park
  • Patent number: 8043522
    Abstract: The invention provides a ferrite material (ferrite sintered body, ferrite powders) having a composition formula of (1-x-y-z)(Li0.5Fe0.5)O.xZnO.y(Mn, Fe)2O3.zCuO, wherein x, y, z, and a satisfy 0.175?x?0.29; 0.475?y?0.51; 0.07?z?0.22; and 0.02?a?0.055 in a case of a=Mn/(Mn+Fe). At least one of Co oxide, Co hydroxide, and Co carbonate in an amount of 1 wt. % or less on the basis of CoO may be contained in 100 wt % of the ferrite material. The ferrite material has a normalized impedance ZN of 40000 ?/m or more at 30 MHz and a normalized impedance ZN of 60000 ?/m or more at 100 MHz as well as a specific resistance of 106 ?m or more.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: October 25, 2011
    Assignee: Hitachi Metals, Ltd.
    Inventors: Tomoyuki Tada, Yasuharu Miyoshi, Takeshi Yanagihara
  • Patent number: 8004381
    Abstract: A laminated device comprising pluralities of magnetic ferrite layers, conductor patterns each formed on each magnetic ferrite layer and connected in a lamination direction to form a coil, and a non-magnetic ceramic layer formed on at least one magnetic ferrite layer such that it overlaps the conductor patterns in a lamination direction, the non-magnetic ceramic layer comprising as main components non-magnetic ceramics having higher sintering temperatures than that of the magnetic ferrite, and further one or more of Cu, Zn and Bi in the form of an oxide.
    Type: Grant
    Filed: July 5, 2007
    Date of Patent: August 23, 2011
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yasuhisa Katayama, Tohru Umeno, Takeshi Tachibana
  • Patent number: 7959821
    Abstract: An electromagnetism suppressing material has an increased electromagnetism suppressing effect, can be flexibly formed in various shapes, and is inexpensive. An electromagnetism suppressing device uses the electromagnetism suppressing material, and an electronic appliance uses the electromagnetism suppressing material or the electromagnetism suppressing device. The electromagnetism suppressing material is a liquid material and/or gel material with electrical polarity.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: June 14, 2011
    Assignee: Sony Corporation
    Inventors: Yoshihiro Kato, Yoshinori Ito, Katsumi Okayama, Kaoru Kobayashi, Masaki Orihashi, Makoto Suzuki, Takashi Miyazaki
  • Patent number: 7910214
    Abstract: The present invention relates to a molded ferrite sheet having opposing surfaces and a thickness in a range of 30 ?m to 430 ?m, at least one surface of said opposing surfaces having the following surface roughness characteristics (a) to (c): (a) a center line average roughness is in a range of 170 nm to 800 nm, (b) a maximum height is in a range of 3 ?m to 10 ?m, and (c) an area occupancy rate of cross-sectional area taken along a horizontal plane at a depth of 50% of the maximum height in a square of side 100 ?m is in a range of 10 to 80%.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: March 22, 2011
    Assignee: Toda Kogyo Corporation
    Inventors: Tetsuya Kimura, Tomohiro Dote, Kazumi Yamamoto, Takanori Doi, Yoji Okano
  • Patent number: 7837892
    Abstract: Rubber compound containing at least one nanoscale, magnetic filler and at least one non-magnetic filler. Vulcanizable mixture containing the rubber compound and at least one crosslinking agent and/or vulcanization accelerator. Molding obtainable from the vulcanizable mixture by heat treatment or action of an electrical, magnetic or electromagnetic alternating field.
    Type: Grant
    Filed: August 20, 2005
    Date of Patent: November 23, 2010
    Assignee: Evonik Degussa GmbH
    Inventors: Markus Pridoehl, Guido Zimmermann, Joachim Froehlich, Achim Gruber, Gregor Grun, Thomas Ruehle, Dirk W. Schubert
  • Publication number: 20100257725
    Abstract: 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: Application
    Filed: November 10, 2008
    Publication date: October 14, 2010
    Applicant: SONY CORPORATION
    Inventor: Hiraku Akiho
  • Patent number: 7758766
    Abstract: 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: Grant
    Filed: September 17, 2007
    Date of Patent: July 20, 2010
    Assignee: TDK Corporation
    Inventor: Atsushi Ohido
  • Publication number: 20100040553
    Abstract: A method for producing spherical ferrite nanoparticles includes the steps of: preparing a first aqueous solution containing a disaccharide, an alkaline, an oxidation agent, seed particles and divalent iron ions; and conducting particle growth in the first aqueous solution to produce the spherical ferrite nanoparticles.
    Type: Application
    Filed: December 28, 2007
    Publication date: February 18, 2010
    Applicants: Tokyo Institute of Technology, TAMAGAWA SEIKI KABUSHIKI KAISHA
    Inventors: Masanori Abe, Hiroshi Handa, Takashi Nakagawa, Masaru Tada, Ryuichi Shimazu, Toshiyuki Tanaka
  • Patent number: 7651626
    Abstract: There is provided Y-type hexagonal ferrite having a high density of sintered body and a low level of loss and an antenna. The hexagonal ferrite having Y-type ferrite as the main phase is characterized in that main components of the hexagonal ferrite are M1O (M1 stands for at least one of Ba and Sr), M2O (M2 stands for at least one of Co, Ni, Cu, Zn and Mn) and Fe2O3, and the loss factor and the density of sintered body are 0.15 or lower and 4.6×103 kg/m3 or higher, respectively. The hexagonal ferrite is used to configure an antenna and a communication apparatus.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: January 26, 2010
    Assignee: Hitachi Metals, Ltd.
    Inventors: Masayuki Gonda, Hiroyuki Aoyama
  • Patent number: 7527744
    Abstract: 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: Grant
    Filed: August 30, 2006
    Date of Patent: May 5, 2009
    Assignee: TDK Corporation
    Inventors: Ryuichi Wada, Takuya Aoki, Hiroshi Momoi, Yukio Takahashi, Takahiro Satoh
  • Patent number: 7524433
    Abstract: The temperature properties of the initial permeability of a Ni—Cu—Zn based ferrite material are improved while the degradation of the magnetic properties of the ferrite material is being suppressed. The ferrite material is formed of a sintered body comprising, as main constituents, Fe2O3: 47.0 to 50.0 mol %, CuO: 0 to 7 mol %, NiO: 13 to 26 mol %, and ZnO substantially constituting the balance, wherein the sintered body comprises 40 ppm or less of P in terms of P2O5 and 50 to 1800 ppm of one or more additives of Al2O3, CaO and MgO in relation to the sum of the contents of the main constituents. In the Ni—Cu—Zn based ferrite material, the mean grain size can be set at 12 ?m or less and the standard deviation of the grain size can be set at 4.5 ?m or less.
    Type: Grant
    Filed: May 19, 2005
    Date of Patent: April 28, 2009
    Assignee: TDK Corporation
    Inventors: Shin Takane, Takuya Aoki
  • Publication number: 20090039309
    Abstract: Magnetorheological elastomer composites comprising at least one thermoplastic elastomer which forms a thermoplastic matrix and magnetisable particles which are contained therein, the elastomer matrix containing at least 10% by weight of plasticiser, relative to the thermoplastic elastomer.
    Type: Application
    Filed: July 13, 2006
    Publication date: February 12, 2009
    Applicant: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventors: Holger BOSE, Rene Roder
  • Publication number: 20080296528
    Abstract: A multilayer inductor component has a multilayer part having a plurality of magnetic layers laminated therein and a conductor part arranged within the multilayer part. The magnetic layers are formed from a ferrite material and an additive. The ferrite material contains Fe2O3, NiO, CuO, and ZnO. Fe2O3 is 30 to 45 mol %. NiO is 45 to 58 mol %. CuO is 6 to 10 mol %. ZnO is 0 to 3 mol %. The additive contains CoO. The content of CoO is 0.1 to 2.5 mass % with respect to the ferrite material as a whole. The multilayer inductor component has an impedance peak of 500? or greater at an operating frequency of 1 GHz or higher.
    Type: Application
    Filed: May 5, 2008
    Publication date: December 4, 2008
    Applicant: TDK CORPORATION
    Inventors: Naoki SUTOH, Takashi SUZUKI, Kunio ODA, Yukio TAKAHASHI, Kunihiko KAWASAKI, Hiroshi MOMOI
  • Patent number: 7399571
    Abstract: Disclosed herein is multilayered sheet comprising a core layer comprising a thermoplastic polymer and an IR absorbing additive; wherein the IR absorbing additive is a metal oxide; and a first cap layer comprising a thermoplastic polymer and an electromagnetic radiation absorbing additive; wherein a surface of the first cap layer is disposed upon and in intimate contact with a surface of the core layer. Disclosed herein too is a method for manufacturing a multilayered sheet comprising melt blending a composition comprising a thermoplastic polymer and an IR absorbing additive to produce a core layer; melt blending a composition comprising a thermoplastic polymer and an ultraviolet radiation absorber to produce a first cap layer; combining the core layer with the first cap layer in such a manner that the cap layer is disposed upon and in intimate contact with a surface of the core layer.
    Type: Grant
    Filed: May 6, 2005
    Date of Patent: July 15, 2008
    Assignee: General Electric Company
    Inventors: Jos van den Bogerd, Josephus Hubertus Cornelius Maria Dekkers, Rein Mollerus Faber, Eelco van Hamersveld, Christianus J. J. Maas
  • Patent number: 7378036
    Abstract: 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 Cr2O3 are added to a predetermined main component mixture composition. Therefore, it is possible to achieve an improvement in DC bias characteristics, an improvement in temperature characteristics of initial magnetic permeability, and an improvement in resistivity and further achieve an improvement in burned body strength, particularly in burned body flexural strength (bending strength).
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: May 27, 2008
    Assignee: TDK Corporation
    Inventors: Ryuichi Wada, Takuya Aoki, Atsuhito Matsukawa, Kensaku Asakura
  • Publication number: 20080111098
    Abstract: The light-polarizing solid coating composition which comprises (i) particles of at least one magnetic material suspended in a solvent, is characterized in that it comprises (ii) at least one dichroic dye compound. Application to ophthalmic optics.
    Type: Application
    Filed: September 30, 2005
    Publication date: May 15, 2008
    Applicant: Essilor International (Compagnie Generale d'Optiqu
    Inventors: John Biteau, Myriam Fanayar
  • Patent number: 7332101
    Abstract: 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 comprising: coating a core material with one or more polyelectrolyte layers resulting in a coated particle; further coating the coated particle with a layer of magnetic nanoparticles resulting in a magnetic particle; coating the magnetic particle with a layer of a polycationic polyelectrolyte resulting in a coated magnetic particle; and applying a magnetic field to the coated magnetic particle in the presence of a metal oxide or metal oxide precursor capable of undergoing hydrolysis.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: February 19, 2008
    Assignee: Massachusetts Institute of Technology
    Inventors: Harpreet Singh, T. Alan Hatton
  • Patent number: 7326360
    Abstract: 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 form substituted cobalt ferrite that provides mechanical properties that make the substituted cobalt ferrite material effective for use as sensors and actuators. The substitution of transition metals lowers the Curie temperature of the material (as compared to cobalt ferrite) while maintaining a suitable magnetostriction for stress sensing applications.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: February 5, 2008
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: David C. Jiles, Jason A. Paulsen, John E. Snyder, Chester C. H. Lo, Andrew P. Ring, Keith A. Bormann
  • Patent number: 7311854
    Abstract: 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 of ZnO. When the Zn concentration in the sintered body interior is taken to be 1, the Zn concentration in the surface vicinity is 0.8 to 12. This increases the surface resistance of the ferrite sintered body and lowers its core loss.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: December 25, 2007
    Assignee: Kyocera Corporation
    Inventor: Hidehiro Takenoshita
  • Patent number: 7238298
    Abstract: An Ni—Cu—Zn-based ferrite material contains TiO2 alone as an additive in an amount of 0.1 wt %<x?4.0 wt % in which x denotes a content of the TiO2 and unavoidable impurities. The principal components thereof are 43.0 to 49.8 mol % of Fe2O3, 4.0 to 13.0 mol % of CuO, 5 to 35 mol % of ZnO and the balance of NiO.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: July 3, 2007
    Assignee: TDK Corporation
    Inventors: Takuya Aoki, Taku Murase
  • Publication number: 20070138431
    Abstract: 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: Application
    Filed: August 30, 2006
    Publication date: June 21, 2007
    Applicant: TDK CORPORATION
    Inventors: Ryuichi Wada, Takuya Aoki, Hiroshi Momoi, Yukio Takahashi, Takahiro Satoh
  • Patent number: 7195717
    Abstract: 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 two or more kinds of solid solutions selected from NiFe2O4, ZnFe2O4 and FeFe2O4, wherein full width at half maximum of a diffraction peak, of crystal phase of which diffraction angle 2? is in a range from 34.6 to 36.4° as measured by X-ray diffraction analysis using Cu—K? beam, is 0.4° or less.
    Type: Grant
    Filed: July 27, 2004
    Date of Patent: March 27, 2007
    Assignee: Kyocera Corporation
    Inventors: Chisato Ishida, Masayuki Moriyama, Hidehiro Takenoshita
  • Patent number: 7101489
    Abstract: 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 first magnetic material is different from that of the second magnetic material. The first and second magnetic particles are mixed so that, at a frequency of an intersecting point between a first curve representing a frequency characteristic of a real part of a complex magnetic permeability of the first magnetic material and a second curve representing a frequency characteristic of a real part of a complex magnetic permeability of the second magnetic material, a value of a real part of a complex magnetic permeability of the composite magnetic material is larger than a value of the intersecting point.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: September 5, 2006
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takashi Umemoto, Hideki Yoshikawa, Keiichi Kuramoto, Hitoshi Hirano