High Temperature (tc Greater Than 30 K) Superconductor Material (i.e., Element, Compound, Or Composition), Per Se Patents (Class 505/100)
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Publication number: 20120172231Abstract: A composite superconductor and methods of providing same include a superconductor powder dispersed within a conductive polymer matrix.Type: ApplicationFiled: December 31, 2010Publication date: July 5, 2012Inventors: Carlton Anthony Taft, Gerson Silva Paiva, Nelson Cesar Chaves Pinto Furtado
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Publication number: 20120142536Abstract: The present invention concerns the enhancement of critical current densities in cuprate superconductors. Such enhancement of critical current densities include using wave function symmetry and restricting movement of Abrikosov (A) vortices, Josephson (J) vortices, or Abrikosov-Josephson (A-J) vortices by using the half integer vortices associated with d-wave symmetry present in the grain boundary.Type: ApplicationFiled: June 8, 2011Publication date: June 7, 2012Applicant: SOLAR-TECTIC, LLCInventors: Praveen Chaudhari, Karin Chaudhari, Ashok Chaudhari, Pia Chaudhari
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Patent number: 8148300Abstract: The present invention relates to a superconducting film having a substrate and a superconductor layer formed on the substrate, in which nano grooves are formed parallel to a current flowing direction on a substrate surface on which the superconductor layer is formed and two-dimensional crystal defects are introduced in the superconductor layer on the nano grooves, and a method of manufacturing this superconducting film. A superconducting film of the invention, which is obtained at low cost and has very high Jc, is useful in applications such as cables, magnets, shields, current limiters, microwave devices, and semifinished products of these articles.Type: GrantFiled: April 30, 2010Date of Patent: April 3, 2012Assignees: Japan Science and Technology Agency, Central Research Institute of Electric Power IndustryInventors: Kaname Matsumoto, Masashi Mukaida, Yutaka Yoshida, Ataru Ichinose, Shigeru Horii
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Patent number: 8142881Abstract: A superconductor for mitigating the effects of local current disruptions in a superconducting filament. The superconductor comprises superconducting filaments covered by a medium in electrical communication with the filaments. The covering medium has anisotropic conductivity, the conductivity in a direction substantially aligned with the filaments being selected to stabilize the superconductor near the critical temperature, and the conductivity of the covering in a direction substantially perpendicular to the filaments being selected to permit controlled current sharing between the filaments, especially when a filament is compromised, while simultaneously limiting alternating current (ac) losses. In various embodiments, the covering comprises a wire mesh having longitudinal wires made of a first material having a first conductivity, and transverse wires made of a second material having a second conductivity, different from the first conductivity.Type: GrantFiled: July 27, 2010Date of Patent: March 27, 2012Assignee: American Superconductor CorporationInventor: Cornelis Leo Hans Thieme
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Publication number: 20120035055Abstract: Problem: To provide an REBCO superconductor which has electromagnetic properties of an extremely small magnetization in a DC magnetic field or an extremely small pinning loss in a fluctuating magnetic field and thereby enable production of a REBCO superconducting wire with an extremely small magnetization and pinning loss. Solution to Problem: A RE1Ba2Cu3O7-z superconductor characterized by having a magnetization-zero-region on its magnetization curve, wherein in the magnetization-zero-region a rate of change of magnetization remains at about zero near zero magnetization, the magnetization curve is formed when an external magnetic field turns from an increase to a decrease or from a decrease to an increase, and RE is one or more of Y, Gd, Nd, Sm, Eu, Yb, Pr, and Ho.Type: ApplicationFiled: June 7, 2011Publication date: February 9, 2012Inventors: Masataka IWAKUMA, Akira Ibi, Teruo Izumi, Yuh Shiohara
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Patent number: 8110424Abstract: There is provided a surface treatment method of a group III nitride semiconductor including: providing a group III nitride semiconductor including a first surface having a group III polarity and a second surface opposing the first surface and having a nitrogen polarity; and irradiating a laser beam onto the second surface to change the nitrogen polarity of the second surface to the group III polarity.Type: GrantFiled: April 7, 2009Date of Patent: February 7, 2012Assignee: Samsung LED Co., Ltd.Inventors: Jong In Yang, Sang Bum Lee, Sang Yeob Song, Si Hyuk Lee, Tae Hyung Kim
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Patent number: 8092721Abstract: Methods and compositions for the deposition of ternary oxide films containing ruthenium and an alkali earth metal.Type: GrantFiled: March 26, 2009Date of Patent: January 10, 2012Assignees: L'Air Liquide Societe Anonyme pour l'Etude Et l'Exploitation des Procedes Georges Claude, American Air Liquide, Inc.Inventors: Satoko Gatineau, Julien Gatineau, Christian Dussarrat
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Publication number: 20110319268Abstract: A seed crystal for the fabrication of a superconductor is grown from a rare-earth oxide having the basic formula XwZtBaxCuyOz, X comprising at least one rare-earth element and Z being a dopant which raises the peritectic decomposition temperature (Tp) of the oxide. In a preferred embodiment, the dopant is Mg. Use to of this rare-earth oxide material for seed crystals increases the temperature at which cold-seeding can be performed and thus enables the growth of a wider range of bulk superconductor materials by this process.Type: ApplicationFiled: June 30, 2011Publication date: December 29, 2011Applicant: Cambridge Enterprise LimitedInventors: David Anthony Cardwell, Nadendla Hari Babu, Yun-Hua Shi
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Publication number: 20110301039Abstract: Preparation and deposition of supercooled, electron-doped, water-cluster clathrate nanoparticles in confined geometries and on substrates from proprietary nanoemulsions is described. The compositions can yield high-Tc superconductors, e.g., in the vicinity of ?43 deg C., useful for SQUID devices in electronic and magnetic application. In certain embodiments, the water-cluster clathrates are formed in nanoemulsions.Type: ApplicationFiled: December 29, 2009Publication date: December 8, 2011Applicant: HYDROELECTRON VENTURES, INC.Inventors: Keith Johnson, Matthew Price-Gallagher
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Publication number: 20110301038Abstract: A system for cooling superconducting materials used for magnetization of magnets disposed within a cylindrical structure, the system including a first tubing system for allowing a cooling gas to interact with a high-field strength superconducting material to thermosiphon-cool the high-field strength superconducting material, a second tubing system for allowing a cooling gas to interact with a low-field strength superconducting material to thermosiphon-cool the low-field strength superconducting material, and a cooling gas in liquefied form configured to flow through the first tubing system and/or the second tubing system. An outlet of the first tubing system and an outlet of the second tubing system are located at a same location on a surface of the cylindrical structure. A method for cool superconducting materials used for magnetization of magnets disposed within a cylindrical structure is also disclosed.Type: ApplicationFiled: December 23, 2010Publication date: December 8, 2011Inventors: Ernst Wolfgang Stautner, Kiruba Sivasubramaniam Haran, James Rochford
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Publication number: 20110269629Abstract: Partially or fully saturated doped graphene materials are found to be superconducting. The saturation is with hydrogen or halogen. Doping is performed by substitution of carbon atoms or by applying an electric field. Diamond nano-rods are also found to be superconducting. These materials can be used in electronic devices having a gate.Type: ApplicationFiled: February 2, 2011Publication date: November 3, 2011Applicant: ISIS INNOVATION LIMITEDInventors: Feliciano Giustino, Andrea C. Ferrari, Gianluca Savini
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Publication number: 20110223480Abstract: The present invention refers to a nanostructured material comprising nanoparticles bound to its surface. The nanostructured material comprises nanoparticles which are bound to the surface, wherein the nanoparticles have a maximal dimension of about 20 nm. Furthermore, the nanostructured material comprises pores having a maximal dimension of between about 2 nm to about 5 ?m. The nanoparticles bound on the surface of the nanostructured material are noble metal nanoparticles or metal oxide nanoparticles or mixtures thereof. The present invention also refers to a method of their manufacture and the use of these materials as electrode material.Type: ApplicationFiled: September 7, 2009Publication date: September 15, 2011Inventors: Tsyh Ying Grace Wee, Nopphawan Phonthammachai, Madhavi Srinivasan, Subodh Mhaisalkar, Yin Chiang Freddy Boey
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Patent number: 7985713Abstract: A magnesium boride thin film having a B-rich composition represented by the general formula of MgBx (x=1 to 10) and a superconducting transition temperature of 10K or more has superior crystallinity and orientation and is used as a superconducting material. This thin film is formed by maintaining a film forming environment in a high vacuum atmosphere of 4×10?5 Pa or less, and simultaneously depositing Mg and B on a substrate maintained at a temperature of 200° C. or less so as to grow the film at a growth rate of 0.05 nm/sec or less. It is preferable to supply an Mg vapor and a B vapor into the film forming environment at an Mg/B molar ratio of 1/1 to 12/1.Type: GrantFiled: March 22, 2006Date of Patent: July 26, 2011Assignee: Incorporated National University Iwate UniversityInventors: Yoshitomo Harada, Masahito Yoshizawa, Haruyuki Endo
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Publication number: 20110177952Abstract: A method is disclosed for making a template for a superconducting coil on a former (25) from a sheet (23) of flexible biaxially-textured material having at least two joining edges, the surface texture of the sheet being defined by a plurality of grains, and the former having a substantially curved surface. The method comprises the steps of shaping the sheet so that each joining edge lies adjacent to another joining edge on application of the sheet to the former, each joining edge and its adjacent edge being a pair of edges, and so that the sheet is dimensioned to cover a part of the surface of the former and substantially to fit that part of the former; positioning the sheet on the former so that regions of the sheet either side of the pair of edges have substantially aligned grains; and forming a join between the pair of edges, the template thereby having a substantially continuous textured surface across the join.Type: ApplicationFiled: November 23, 2006Publication date: July 21, 2011Applicant: COATED CONDUCTOR CYLINDERS LTDInventor: Eamonn Maher
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Publication number: 20110136670Abstract: Compositions are disclosed of a matrix of a high temperature superconductive oxide such as YBCO, with non-superconductive particles distributed in the matrix. The non-superconductive particles comprise at least one rare earth element (RE) and at least one of tantalum (Ta) and niobium (Nb). Of particular interest are non-superconductive particles of composition RE-Ta3O7 (RTO), where RE is Yb, Er, Gd or Sm, disposed in a YBCO superconductive matrix.Type: ApplicationFiled: August 5, 2009Publication date: June 9, 2011Applicant: CAMBRIDGE ENTERPRISE LIMITEDInventors: Sophie-Ann Harrington, Judith Macmanus-Driscoll
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Publication number: 20110111965Abstract: Provides a new non-oxide system compound material superconductor as an alternative of the perovskite type copper oxides superconductor. Layered compounds which are represented by chemical formula AF(TM)Pn (wherein, A is at least one selected from a group consisting of the second family elements in the long form periodic table, F is a fluorine ion, TM is at least one selected from a group of transition metal elements consisting of Fe, Ru, Os, Ni, Pd, and Pt, and Pn is at least one selected from a group consisting of the fifteenth family elements in the long form periodic table), having a crystal structure of ZrCuSiAs type (space group P4/nmm) and which become superconductors by doping trivalent cations or divalent anions.Type: ApplicationFiled: July 9, 2009Publication date: May 12, 2011Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Hideo Hosono, Hiroshi Yanagi, Toshio Kamiya, Satoru Matsuishi, Sungwng Kim, Seok Gyu Yoon, Hidenori Hiramatsu, Masahiro Hirano, Takatoshi Nomura, Yoichi Kamihara
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Publication number: 20110111962Abstract: Improved magnesium diboride superconducting materials and methods of synthesis are disclosed. Embodiments of the superconducting material comprise at least two starting materials capable of forming MgB2 and at least one dopant compound comprising silicon, carbon, hydrogen and oxygen. The starting materials and the at least one dopant compound are heated and mixed at an atomic level to produce a silicon-doped MgB2 superconducting material. Examples of the dopant compound include silicone oil, Triacetoxy(methyl)silane (2), 1,7-Dichloro-octamethyltetrasiloxane (2) and Tetramethyl orthosilicate (6).Type: ApplicationFiled: July 23, 2007Publication date: May 12, 2011Applicant: University of WollongongInventors: Xiaolin Wang, Shi Xue Dou, Md. Shahriar Al Hossain, Zhenxiang Cheng
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Publication number: 20110108773Abstract: Methods and systems disclosed herein involve conversion of precursors to electronic films with many properties such as conductor, resistor, semiconductor, photovoltaic, insulator and optical conversion films. There are a large number of materials such as transition metal oxides, metals, combination oxides that may be deposited as organic precursors and subsequently processed by radiated energy. In practice of the systems and methods disclosed herein, the films are processed by a “matched” radiation to either intrinsic absorption of the film precursors, or due to an added absorber to the film precursors. Since many of the precursors have been previously described as “Metal-Organic” precursors, the process can be described as “Metal-Organic Deposition by Enhanced Light-Absorption” (MODEL-A).Type: ApplicationFiled: November 8, 2010Publication date: May 12, 2011Applicant: YewSavin, Inc.Inventor: Makarand P. Gore
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Publication number: 20110089780Abstract: A magnetic bearing with high-temperature superconductor elements which has a stator and a rotor, which is held such that it can rotate with respect to the stator and is mounted in an axially and radially self-regulating manner in the stator. A body of a Type-2 superconductor, in particular a high-temperature superconductor, is provided on the rotor. The stator has a coil of a superconducting material.Type: ApplicationFiled: June 10, 2009Publication date: April 21, 2011Applicant: SCHAEFFLER TECHNOLOGIES GMBH & CO. KGInventor: Sergej Schwarz
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Publication number: 20110082041Abstract: In some implementations of the invention, existing high temperature superconducting materials (“HTS materials”) may be modified and/or new HTS materials may be created by enhancing (in the case of existing HTS materials) and/or creating (in the case of new HTS materials) an aperture within the HTS material such that the aperture is maintained at increased temperatures so as not to impede propagation of electrical charge there through. In some implementations of the invention, as long as the propagation of electrical charge through the aperture remains unimpeded, the material should remain in a superconducting state; otherwise, as the propagation of electrical charge through the aperture becomes impeded, the HTS material begins to transition into a non-superconducting state.Type: ApplicationFiled: October 2, 2010Publication date: April 7, 2011Inventor: Douglas J. GILBERT
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Publication number: 20110045984Abstract: A composition of matter including a thin film of a high temperature superconductive oxide having particles randomly dispersed therein, the particles of an yttrium-barium-ruthenium oxide or of an yttrium-barium-niobium oxide is provided.Type: ApplicationFiled: August 5, 2010Publication date: February 24, 2011Inventors: Terry G. Holesinger, David M. Feldmann
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Publication number: 20110034336Abstract: A superconducting article includes a substrate having a biaxially textured surface, and an epitaxial biaxially textured superconducting film supported by the substrate. The epitaxial superconducting film includes particles of Ba2RENbO6 and is characterized by a critical current density higher than 1 MA/cm2 at 77K, self-field. In one embodiment the particles are assembled into columns. The particles and nanocolumns of Ba2RENbO6 defects enhance flux pinning which results in improved critical current densities of the superconducting films. Methods of making superconducting films with Ba2RENbO6 defects are also disclosed.Type: ApplicationFiled: August 4, 2010Publication date: February 10, 2011Inventors: Amit Goyal, Sung-Hun Wee, Eliot Specht, Claudia Cantoni
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Patent number: 7884450Abstract: A process for growth of boron-based nanostructures, such as nanotubes and nanowires, with a controlled diameter and with controlled chemical (such as composition, doping) as well as physical (such as electrical and superconducting) properties is described. The boron nanostructures are grown on a metal-substituted MCM-41 template with pores having a uniform pore diameter of less than approximately 4 nm, and can be doped with a Group Ia or Group IIa electron donor element during or after growth of the nanostructure. Preliminary data based on magnetic susceptibility measurements suggest that Mg-doped boron nanotubes have a superconducting transition temperature on the order of 100 K.Type: GrantFiled: March 27, 2009Date of Patent: February 8, 2011Assignee: Yale UniversityInventors: Lisa Pfefferle, Dragos Ciuparu
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Publication number: 20110021360Abstract: The superconductive nanocomposite is a composition formed by nanoparticles of a high temperature superconductor blended with a polymer matrix containing natural rubber and polyethylene. The high temperature superconductor is preferably a bismuth-based superconductor (BSCCO) having a particle size of about 21 nm, but may be any other high temperature or Type II ceramic, metal oxide superconductor. The superconductor nanoparticles comprise about 15% of the weight of natural rubber in the composition. The polyethylene is preferably low density polyethylene and may comprise between 0% up to about 40% of the weight of natural rubber in the composition. The nanocomposite may be prepared by blending the components and roll milling the rubber.Type: ApplicationFiled: July 22, 2009Publication date: January 27, 2011Inventors: Ahmed Abdullah S. Al-Ghamdi, El-Sayed El-Badaway H. El-Mossalamy, Farid Mahmoud El-Tantawy, Nadia Abdel Aal
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Patent number: 7863221Abstract: For producing the superconducting material MgB2, a shapeable master alloy containing Mg and B, as well as at least one additional constituent, an LiMgB alloy is.1 The process permits the production of shaped elements of MgB2, for example by forging, casting, drawing, etc.Type: GrantFiled: March 4, 2002Date of Patent: January 4, 2011Assignee: Eidenossische Technische Hochschule ZurichInventors: Juan Matias Reinoso, Frank Ottinger, Michael Woerle, Reinhard Nesper
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Patent number: 7838465Abstract: A method of synthesizing a superconducting material, comprising mixing starting materials comprising magnesium, boron, silicon and carbon; heating the mixture of starting materials to a temperature in the range between 650° C. and 2000° C. to produce a material comprising magnesium boride doped with silicon carbide; and cooling the resulting material to a temperature below the critical temperature of the material to render the material capable of superconducting.Type: GrantFiled: September 3, 2009Date of Patent: November 23, 2010Assignee: University of WollongongInventors: Shi Xue Dou, Hau Kun Liu, Alexey Vladimirovich Pan, Sihai Zhou, Mihail Horia Ionescu
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Patent number: 7807608Abstract: Coated conductors have a substrate, a high temperature superconductor layer and at least one or more buffer layers, wherein at least one of the buffer layers is a template for biaxially orienting the high temperature superconductor layer wherein the template is composed of a polycrystalline film consisting of a non-stoichiometric material having the nominal chemical formula A2?xB2+xO7 with B being at least one selected from Zr, Hf, Sn, Pb and Ti; A being at least one selected from La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Y, Tm, Yb and Lu; and x?0; and wherein the substrate is textured.Type: GrantFiled: May 1, 2007Date of Patent: October 5, 2010Assignee: NexansInventors: Andre Wolf, Dirk Isfort, Mark O. Rikel
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Publication number: 20100248967Abstract: The invention herein is directed towards a material exhibiting superconductivity characteristics which includes a laser processed region of a metal oxide crystal. The material has a transition temperature greater than a transition temperature of the metal oxide crystal, preferably greater than 140K. The transition temperature of the material may be considered greater than the transition temperature of the metal oxide crystal if the material has a transition temperature and the metal oxide crystal has no transition temperature. The present invention is also directed to a material which includes a laser processed strontium ruthenate crystal wherein the material has a greater oxygen content than the starting strontium ruthenate crystal. The present invention is also directed towards a method for manufacturing a material exhibiting superconductivity characteristics that includes providing a metal oxide crystal and laser ablating the metal oxide crystal and a material made by this process.Type: ApplicationFiled: September 12, 2006Publication date: September 30, 2010Inventors: Armen Gulian, Kent S. Wood, Deborah Van Vechten, Vahan R. Nikoghosyan
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Patent number: 7772157Abstract: The present invention relates to a superconducting film having a substrate and a superconductor layer formed on the substrate, in which nano grooves are formed parallel to a current flowing direction on a substrate surface on which the superconductor layer is formed and two-dimensional crystal defects are introduced in the superconductor layer on the nano grooves, and a method of manufacturing this superconducting film. A superconducting film of the invention, which is obtained at low cost and has very high Jc, is useful in applications such as cables, magnets, shields, current limiters, microwave devices, and semifinished products of these articles.Type: GrantFiled: August 27, 2004Date of Patent: August 10, 2010Assignees: Japan Science and Technology Agency, Central Research Institute of Electric Power IndustryInventors: Kaname Matsumoto, Masashi Mukaida, Yutaka Yoshida, Ataru Ichinose, Shigeru Horii
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Patent number: 7763343Abstract: A superconductor for mitigating the effects of local current disruptions in a superconducting filament. The superconductor comprises superconducting filaments covered by a medium in electrical communication with the filaments. The covering medium has anisotropic conductivity, the conductivity in a direction substantially aligned with the filaments being selected to stabilize the superconductor near the critical temperature, and the conductivity of the covering in a direction substantially perpendicular to the filaments being selected to permit controlled current sharing between the filaments, especially when a filament is compromised, while simultaneously limiting alternating current (ac) losses. In various embodiments, the covering comprises a wire mesh having longitudinal wires made of a first material having a first conductivity, and transverse wires made of a second material having a second conductivity, different from the first conductivity.Type: GrantFiled: March 31, 2006Date of Patent: July 27, 2010Assignee: American Superconductor CorporationInventor: Cornelis Leo Hans Thieme
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Publication number: 20100144535Abstract: Disclosed are devices comprising multiple nanogaps having a separation of less than about 5 nm. Also disclosed are methods for fabricating these devices.Type: ApplicationFiled: February 13, 2008Publication date: June 10, 2010Applicant: The Trustees of the University of PennsylvaniaInventors: Douglas R. Strachan, Danvers E. Johnston, Beth S. Guiton, Peter K. Davies, Dawn A. Bonnell, Alan T. Johnson, JR.
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Publication number: 20100012349Abstract: An object of the invention is to provide a polycrystalline thin film which includes an intermediate layer that is made thinner while keeping high crystal orientation so as to prevent warpage of a substrate resulting from internal stress of the film. A polycrystalline thin film according to the invention includes an intermediate layer formed by a first layer and a second layer laminated in this order and provided on a metal substrate. The first layer has a rock-salt crystal structure and the second layer has a fluorite crystal structure.Type: ApplicationFiled: September 29, 2009Publication date: January 21, 2010Applicants: Fujikara Ltd., International Superconductivity Technology CenterInventors: Yasuhiro IIJIMA, Satoru Hanyu
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Patent number: 7625843Abstract: There is provided a method of fabricating a precursor solution for a metal organic deposition method using a superconducting oxide as a starting material, wherein the method includes dispersing a superconducting material powder in a TFA acid aqueous solution, heating to dissolve the powder in the TFA solution, increasing a temperature of a hot substrate if the powder is completely dissolved and the solution is clear, continuously heating until the solution is vaporized and is in a viscous jelly state, stopping heating if the solution loses its flowing property completely, cooling the solution, and dissolving the compound in the jelly state, hardened at a room temperature, into an organic solvent to provide a metal organic deposition solution for coating. There is also provided a method of fabricating a thin film-type superconductor using a metal organic deposition method.Type: GrantFiled: January 13, 2006Date of Patent: December 1, 2009Assignee: Korea Institute of Machinery & MaterialsInventors: Gye-Won Hong, Hee-Gyon Lee, Sang-Im Yoo, Jai-Moo Yoo
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Patent number: 7569520Abstract: In a metal sheath MgB2 superconducting wire, it is intended to achieve a wire having increased current density and a long length at the same time, by densitying superconducting core part. The superconducting wire is manufactured by forming diffusion hardened layer on the inner surface of the sheath such that the hardness of the inner surface becomes higher than that of the outer surface, filling MgB2 superconductor, and further if necessary, a critical current density increasing material such as indium, copper, and tin, in a metal sheath, to subject it to wire drawing. For the metal sheath, a material with toughness such as steel is used. Even if the sheath is made to a long wire, it does not break, thereby, enabling to density superconducting core part.Type: GrantFiled: February 3, 2006Date of Patent: August 4, 2009Assignee: Hitachi, Ltd.Inventors: Kazuhide Tanaka, Masaya Takahashi, Michiya Okada, Hiroaki Kumakura, Hitoshi Kitaguchi
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Patent number: 7554029Abstract: The present invention provides a novel complex oxide capable of achieving high performance as a p-type thermoelectric material. The complex oxide comprises a layer-structured oxide represented by the formula BiaPbbM1cCOdM2eOf wherein M1 is one or more elements selected from the group consisting of Na, K, Li, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Pb, Ca, Sr, Ba, Al, Y, and lanthanoids; M2 is one or more elements selected from the group consisting of Ti, V, Cr, Mn, Fe, Ni, Cu, Mo, W, Nb, Ta, and Ag; 1.8?a?2.5; 0?b?0.5; 1.8?c?2.5; 1.6?d?2.5; 0?e?0.5; and 8?f?10; and at least one interlayer component selected from the group consisting of F, Cl, Br, I, HgF2, HgCl2, HgBr2, HgI2, TlF3, TlCl3, TlBr3, TlI3, BiF3, BiCl3, BiBr3, BiI3, PbF2, PbCl2, PbBr2, and PbI2. The interlayer component being present between layers of the layer-structured oxide.Type: GrantFiled: August 18, 2005Date of Patent: June 30, 2009Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Ryoji Funahashi, Emmanuel Guilmeau
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Patent number: 7531892Abstract: A process for growth of boron-based nanostructures, such as nanotubes and nanowires, with a controlled diameter and with controlled chemical (such as composition, doping) as well as physical (such as electrical and superconducting) properties is described. The boron nanostructures are grown on a metal-substituted MCM-41 template with pores having a uniform pore diameter of less than approximately 4 nm, and can be doped with a Group Ia or Group IIa electron donor element during or after growth of the nanostructure. Preliminary data based on magnetic susceptibility measurements suggest that Mg-doped boron nanotubes have a superconducting transition temperature on the order of 100 K.Type: GrantFiled: December 13, 2004Date of Patent: May 12, 2009Assignee: Yale UniversityInventors: Lisa Pfefferle, Dragos Ciuparu
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Publication number: 20090062128Abstract: A magnesium boride thin film having a B-rich composition represented by the general formula of MgBx (x=1 to 10) and a superconducting transition temperature of 10K or more has superior crystallinity and orientation and is used as a superconducting material. This thin film is formed by maintaining a film forming environment in a high vacuum atmosphere of 4×10?5 Pa or less, and simultaneously depositing Mg and B on a substrate maintained at a temperature of 200° C. or less so as to grow the film at a growth rate of 0.05 nm/sec or less. It is preferable to supply an Mg vapor and a B vapor into the film forming environment at an Mg/B molar ratio of 1/1 to 12/1.Type: ApplicationFiled: March 22, 2006Publication date: March 5, 2009Applicant: INCORPORATED NATIONAL UNIVERSITY IWATE UNIVERSITYInventors: Yoshitomo Harada, Masahito Yoshizawa, Haruyuki Endo
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Publication number: 20090033330Abstract: A superconductor exemplarily described herein includes a superconducting material containing magnetic impurities and non-magnetic disorders formed in the superconducting material. The superconductor described herein is suitable for use in magnet applications and power transmission.Type: ApplicationFiled: July 31, 2008Publication date: February 5, 2009Inventor: Yong Jihn Kim
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Publication number: 20080280767Abstract: A method for producing a superconducting wire material having a high resistivity layer outside a superconducting material, which is capable of easily forming a homogeneous high resistivity layer, a superconducting wire material and a superconducting device are provided. A raw material of superconducting wire material is coated with a first silver-containing metal to obtain a silver sheath member. This silver sheath member is coated with a non-silver metal free of silver. At least a part of the first silver-containing metal in the member coated with a non-silver metal and the non-silver metal are intermetallically compounded with each other. This intermetallically compounded metal is oxidized to form a high resistivity layer. The member having a high resistivity layer formed thereon is heat-treated to convert the aforementioned raw material to a superconducting material.Type: ApplicationFiled: March 13, 2006Publication date: November 13, 2008Inventors: Kouhei Yamazaki, Kozo Osamura, Teppei Ogawa
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Patent number: 7445681Abstract: There are provided an intermetallic-compound superconductor that is high in superconducting transition temperature, and an alloy superconductor that is high in superconducting transition temperature and excels in malleability and ductility, as well as a method of making such a superconductor with good reproducibility and at a low cost of manufacture. This entirely new intermetallic compound superconductor is made of magnesium (Mg) and beryllium (Be) and has a chemical composition expressed by formula: Mg1Be2, has a hexagonal AlB2 type crystallographic structure and has a superconducting transition temperature (Tc) of 35 K. An alloy containing this intermetallic compound excels in malleability and ductility and constitutes the alloy superconductor having a superconducting transition temperature (Tc) of 35 K and being low in specific resistance for normal conduction at a temperature ranging from the superconducting transition temperature to a room temperature.Type: GrantFiled: March 8, 2002Date of Patent: November 4, 2008Assignee: Japan Science and Technology AgencyInventors: Jun Akimitsu, Yuji Zenitani, Takahiro Muranaka, Kazunobu Kadomura
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Publication number: 20080139394Abstract: A superconducting magnetic field coil (1; 21; 31; 41; 51; 61) comprising at least one coil section (42; 43) which is wound in layers, is characterized in that, in at least one layer (11, 12, 13, 14, 101, 102, 103, 104) of the coil section (42; 43) N (with N?2), superconducting wire sections (A, B, C, D, E) are wound in parallel, such that the windings of the N wire sections (A, B, C, D, E) are adjacent to each other and the N wire sections (A, B, C, D, E) are connected in series. The inventive magnetic field coil can be produced at highly reduced costs, in particular, when the magnetic field coil has a comparatively large layer length.Type: ApplicationFiled: July 20, 2007Publication date: June 12, 2008Applicant: Bruker BioSpin GmbHInventor: Klaus Schlenga
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Publication number: 20080125323Abstract: The composition of compounds containing a multiplicity of different elements are optimized in general by full or partial substitutions of one or more of the atoms in such compounds so as to effect an Ne/? value which represents a peak or near peak value in ? (the electron-phonon coupling constant) so as to maximize Tc for such compositions of matter.Type: ApplicationFiled: November 27, 2006Publication date: May 29, 2008Inventor: Daniel A. Nepela
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Publication number: 20080085834Abstract: Circuits exhibiting very low electrical resistance or superconductivity are provided as well as a method for transmitting, storing, or otherwise using electric energy more effectively and efficiently for providing powerful electromagnets for motors and generators, for transmitting electric power with few losses, or for making energy-storage devices with a high energy-density.Type: ApplicationFiled: October 10, 2006Publication date: April 10, 2008Inventor: James Scott Hacsi
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Patent number: 7338921Abstract: An electrode is steeped in a solution of Mg and B and a negative voltage is applied to the electrode so as to precipitate superconductive MgB2 on the electrode. Superconductive MgB2 is easily manufactured in various forms and at low costs without any special device.Type: GrantFiled: April 26, 2002Date of Patent: March 4, 2008Assignee: National Institute for Materials ScienceInventors: Hideki Abe, Hideaki Kitazawa, Akiyuki Matsushita
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Patent number: 7335283Abstract: A method and an apparatus which permits making a composite oxide thin film excellent in crystallinity easily and at a low temperature, with the capability of controlling the basic unit cell structure as desired, and without the need for a post annealing, as well as a composite oxide thin film thereby, especially a Cu group high temperature superconducting thin film, are disclosed. A thin Cu group high temperature superconducting film, which is constituted of a charge supply block (1) and a superconducting block (2), is formed on a substrate by alternately sputtering from a sputtering target having a composition of the charge supply block (1) and a sputtering target having a composition of the superconducting block (2) and repeating such an alternate sputtering operation a number of times needed for the film to reach a desired thickness.Type: GrantFiled: August 24, 2001Date of Patent: February 26, 2008Assignees: Japan Science and Technology Corporation, National Institute of Advanced Industrial Science and TechnologyInventors: Yoshiko Ihara, legal representative, Hideyo Ihara, legal representative, Hidetaka Ihara, legal representative, Gen-ei Ihara, legal representative, Chiaki Ihara, legal representative, Sundaresan Athinarayanan, JiaCai Nie, Hideo Ihara
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Publication number: 20080015111Abstract: Disclosed herein is a method of fabricating a high temperature superconducting film in a vacuum chamber through auxiliary cluster beam spraying using an evaporation method, wherein a high temperature superconducting material is deposited on a substrate in a vapor state by evaporating the high temperature superconducting material, and at the same time, a cluster beam material is formed into gas atoms by heating the cluster beam material charged in a housing, and the formed gas atoms pass through a nozzle of an inlet of the housing and then are sprayed and grown on the substrate in the form of the cluster beam, thereby forming pinning centers in the high temperature superconducting film.Type: ApplicationFiled: January 12, 2007Publication date: January 17, 2008Inventors: Sang Soo Oh, Ho Seop Kim, Kyu Jung Song, Do Jun Youm, Sun Mi Lim, Yong Hwan Jung, Sang Moo Lee, Ye Hyun Jung, Jae Eun Yoo
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Publication number: 20080009417Abstract: A processing apparatus for use in a corrosive operating environment at a temperature range of 25-1500° C. is provided. The apparatus has protective coating structure that includes a glassy material. The glassy material includes at least one of yttrium, cerium, or gadolinium; and aluminum and silicon. The coating composition resists etching by a harsh environment.Type: ApplicationFiled: November 17, 2006Publication date: January 10, 2008Applicant: GENERAL ELECTRIC COMPANYInventors: Victor Lienkong Lou, George Theodore Dalakos, Marc Schaepkens
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Patent number: 7307045Abstract: A signal switching device is disclosed that is capable of transmitting signals with less signal loss while securing a good isolation characteristic. The signal switching device includes a first section formed from a superconducting material connected to a first transmission path. The first section has a smaller cross section at the input end than at the output end or, the signal switching device may include a first section formed from a superconducting material connected to a first transmission path in series, and a second section formed from a superconducting material connected to a second transmission path in parallel. The cross section of the second section is smaller than that of the second transmission path. The length of the second transmission path is determined in such a way that an input impedance of the second transmission path is sufficiently large when the second section is in a superconducting state.Type: GrantFiled: November 7, 2003Date of Patent: December 11, 2007Assignee: NTT DoCoMo, Inc.Inventors: Kunihiro Kawai, Daisuke Koizumi, Kei Satoh, Shoichi Narahashi, Tetsuo Hirota
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Publication number: 20070281861Abstract: The present invention provides a superconducting device including a substrate, a first superconducting pattern formed on the substrate, an insulating pattern formed on the first superconducting pattern, and a second superconducting pattern formed at the uppermost level in the multilayered superconducting pattern. A barrier layer of a Josephson junction is formed on the lower side of, or within the second superconducting pattern. The second superconducting pattern constitutes a circuit element on the insulating pattern.Type: ApplicationFiled: May 30, 2007Publication date: December 6, 2007Applicants: FUJITSU LIMITED, INTERNATIONAL SUPERCONDUCTIVITY TECHNOLOGY CENTER, THE JURIDICAL FOUNDATIONInventors: Yoshihiro Ishimaru, Yoshinobu Tarutani, Keiichi Tanabe
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Patent number: 7300909Abstract: A first Josephson junction in a Single Flux Quantum circuit (SFQ circuit) and a second Josephson junction in an interface circuit (latch driver circuit) are formed with junction materials different from each other, and the junction materials are selected so that the hysteresis of the first Josephson junction in a current-voltage characteristic is smaller than the hysteresis of the second Josephson junction in a current-voltage characteristic.Type: GrantFiled: March 26, 2004Date of Patent: November 27, 2007Assignee: Fujitsu LimitedInventors: Tsunehiro Hato, Masahiro Horibe, Keiichi Tanabe