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公开(公告)号：JP2010225458A
公开(公告)日：2010-10-07
申请号：JP2009072469
申请日：2009-03-24
Applicant: FURUKAWA ELECTRIC CO LTD , INT SUPERCONDUCTIVITY TECH
Inventor： KASAHARA MASAYASU , NAKASAKI RYUSUKE , MATSUI MASAKAZU , YAMAMOTO KIYOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a thin-film superconducting wire and method of manufacturing the same with improved crystal orientation of an interlayer thin film. SOLUTION: The thin-film superconducting wire is provided with a metal substrate, an interlayer having a plurality of layers of metal oxide films containing at least one kind of element selected from a group consisting of Ce, Zr, Y, Gd, Mg, Sr, and Ti formed on the metal substrate, and a conductive layer having a superconducting film formed on the interlayer, of which, the interlayer is equipped with a first oxide film and a second oxide film formed on the first oxide film, with a lattice constant of the first oxide film after formation of the second oxide film to be larger than that before formation of the same. COPYRIGHT: (C)2011,JPO&INPIT
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公开(公告)号：JP2003121076A
公开(公告)日：2003-04-23
申请号：JP2001314737
申请日：2001-10-12
Applicant: INT SUPERCONDUCTIVITY TECH , SHOWA ELECTRIC WIRE & CABLE CO , ISHIKAWAJIMA HARIMA HEAVY IND
Inventor： HONJO AKISATO , EGAMI MASAHIRO , IZUMI TERUO , SHIOBARA TORU
IPC: C03B23/043 , F27B9/04 , F27B9/30 , F27D7/02
Abstract: PROBLEM TO BE SOLVED: To provide an atmosphere control type heat treating furnace capable of forming a stable atmosphere in the axial direction of a tubular furnace and having a simple structure. SOLUTION: A furnace tube is formed into a double structure, four partitioning plates are provided between an outer tube and an inner tube, and two sets of a gas feed passage and a gas exhaust passage are formed. The gas feed passage is provided with multiple gas outflow holes, while the gas exhaust passage is provided with multiple gas inflow holes. Different gases are fed to the gas feed passage and the gas exhaust passage at different velocities respectively, a pressure difference is formed between the gas outflow hole and the gas inflow hole, and the different gases are uniformly passed perpendicularly to the axial direction of the furnace tube respectively.
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3.发明专利
公开(公告)号：JP2003095650A
公开(公告)日：2003-04-03
申请号：JP2002154900
申请日：2002-05-29
Applicant: INT SUPERCONDUCTIVITY TECH
Inventor： YU CHO , YU HIYO , GO HAJIME , MACHI TAKAHITO , SATSUMOTO ANSHIKI , KOSHIZUKA NAOKI , MURAKAMI MASAHITO
Abstract: PROBLEM TO BE SOLVED: To produce MgB2 -based superconductor which is simple to manufacture and excellent in the mass productivity and showing an excellent superconductivity (a high critical current density and the like), retaining the property of the high critical temperature of MgB2 . SOLUTION: The MgB2 -based superconductor in which Ti and/or Ti compound scatteredly exist in the polycrystalline substance of MgB2 is manufactured by pressure-forming the mixture of Mg, B and Ti as shown in Fig. 1 and then firing the pressure-formed mixture in the atmospheric pressure and the like (preferably at the temperature not less than 600 deg.C). It is preferred to give the composition of MgB2 -based superconductor in the range of 0.7
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公开(公告)号：JP2003086851A
公开(公告)日：2003-03-20
申请号：JP2001275282
申请日：2001-09-11
Applicant: FUJITSU LTD , INT SUPERCONDUCTIVITY TECH
Inventor： NAMIGASHIRA TSUNEHIRO
Abstract: PROBLEM TO BE SOLVED: To enable a low-inductance superconducting junction to operate at a high speed of >=20 [GHz] by reducing the inductance of the junction by adopting an extremely simple means, and to provide a method of manufacturing the junction. SOLUTION: In the lamp-edge type superconducting junction using an oxide superconductor, an upper superconducting electrode 24 is extended along a slope composed of a lower superconducting electrode 22 and an interlayer insulating film 23 and, at the same time, is terminated at an appropriate location between the junction 25 with the lower superconducting electrode 22 and the top of the slope of the insulating film 23.
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公开(公告)号：JP2002359408A
公开(公告)日：2002-12-13
申请号：JP2001163707
申请日：2001-05-31
Applicant: INT SUPERCONDUCTIVITY TECH , RAILWAY TECHNICAL RES INST
Inventor： TOMITA MASARU , MURAKAMI MASAHITO , SAWA KOICHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a mechanical permanent current switch of a relatively low cost which acts quickly and supplies a large capacity of current to a superconducting magnet without losses. SOLUTION: The contact-point material of a mechanical permanent current switch is composed of 'bulk RE-Ba-Ca-O superconductor, provided by a fusion method (RE is a rare earth element)' which is impregnated with resin. The energizing direction may be parallel to an ab-surface for effectiveness by dispersing fillers of small linear expansion factor in the resin, enabling the contact surfaces between contact-point materials to be a polished surface, and allowing a surface vertical to the ab-surface of the contact-point material to be the contact surfaces between the contact-point materials. A pre-processing is conducted in which electrifying is performed by increasing a current value, until at least 'voltage rising phenomenon that follows voltage drop' appears, once the contact surfaces of the contact materials are made to contact each other, for use.
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Patent Agency Ranking
公开(公告)号：JP2002279838A
公开(公告)日：2002-09-27
申请号：JP2001076151
申请日：2001-03-16
Applicant: FURUKAWA ELECTRIC CO LTD , NGK SPARK PLUG CO , CHUBU ELECTRIC POWER , INT SUPERCONDUCTIVITY TECH
Inventor： KIN SHAKUHAN , MAEDA TOSHIHIKO , MATSUMOTO KANAME , YAMAGIWA KATSUYA , SUGA TOSHIHIRO , YAMADA YASUSHI , HIRABAYASHI IZUMI
Abstract: PROBLEM TO BE SOLVED: To provide an oxide superconductor structure in which manufacture of an 123 type superconducting membrane by solution growth method is made possible by forming a seed membrane having excellent crystallization, and its manufacturing method. SOLUTION: The oxide superconducting structure comprises a substrate having a perovskite structure, an oxide layer of crystalline substance made of REGaO3 (RE expresses La, Nd, Pr, Sm, Eu, Gd, Dy, Ho, Er, Yb, or Lu) formed on this substrate, and an oxide superconductor formed on this oxide layer. The crystalline substance oxide layer is obtained by forming an amorphous oxide layer and annealing this at a temperature higher than the forming temperature of the amorphous oxide layer and then, crystallizing it.
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公开(公告)号：JP2002198214A
公开(公告)日：2002-07-12
申请号：JP2000404695
申请日：2000-12-26
Applicant: INT SUPERCONDUCTIVITY TECH , RAILWAY TECHNICAL RES INST
Inventor： NAGASHIMA MASARU , TOMITA MASARU , NEMOTO KAORU , HERAI TOSHIKI , MURAKAMI MASAHITO
Abstract: PROBLEM TO BE SOLVED: To provide a superconducting magnet power lead, which is capable of restraining heat from penetrating into a liquid helium system that contains a superconducting coil and feeding sufficient electric power to the superconducting coil. SOLUTION: A superconducting magnet power lead for feeding a current to 'a superconducting coil cooled down to liquid helium temperature of' via 'a radiation heat shielding unit, cooled down to liquid nitrogen temperature' in a superconducting magnet device is made to have a structure in which at least a part of the power lead located inside the radiation heat shielding unit is partially formed of an oxide high-temperature superconducting bulk body, whose critical temperature is higher than liquid nitrogen temperature. In this case, it is preferable that the bulk body be subjected to vacuum resin impregnating treatment to be improved in mechanical strength. When a braided lead is made to serve at least as a part of the magnet power lead except for the bulk body, stresses caused by the relative displacement of a device member is restrained from having adverse effects on the bulk body, so that the superconducting magnet power lead can be protected against damages.
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公开(公告)号：JP2002150855A
公开(公告)日：2002-05-24
申请号：JP2000348192
申请日：2000-11-15
Applicant: FURUKAWA ELECTRIC CO LTD , INT SUPERCONDUCTIVITY TECH
Inventor： MATSUMOTO KANAME , HIRABAYASHI IZUMI , IKEDA TAKERU
Abstract: PROBLEM TO BE SOLVED: To provide an oxide superconductor wire material having stable and excellent crystalline property at its whole lengthened part, with an oxide superconductor film showing high critical current density, and to provide a manufacturing method of the same. SOLUTION: For the oxide superconductor wire material comprising a polycrystalline metal base (1) having an aggregation structure oriented to 100} direction, oxide buffer layers (2, 3) formed on the polycrystalline metal base (1), and an oxide superconductor layer (4) formed on the oxide buffer layer (2, 3), the oxide buffer layer (2, 3) is composed of the first oxide buffer layer (2) with a surface coarseness of Rmax=0.15 μm or less which is a surface oxide layer of the polycrystalline metal base (1), and the second oxide buffer layer (3) formed on the first oxide buffer layer (2).
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公开(公告)号：JP2001342020A
公开(公告)日：2001-12-11
申请号：JP2000158935
申请日：2000-05-29
Inventor： SAKAI NAOMICHI , MURAKAMI MASAHITO , OGASAWARA KEI , ISHIHARA TAIJI
Abstract: PROBLEM TO BE SOLVED: To provide a method of preparing a rare earth oxide super-conductor having high density and high strength. SOLUTION: This method comprises the steps of preparing a rare earth oxide super-conductor preparatively heat treated under oxygen atmosphere or under vacuum, and melting it to grow. More specifically, this method comprises the steps of mixing the materials containing the constituting elements of the rare earth oxide super-conductor in a prescribed ratio, forming the mixture to obtain a preparative formed body, heat treating the preparative formed body in vacuum or in an atmosphere consisting of oxygen only to obtain a preparative sintered compact, pyrolyzing the preparative sintered compact at a temperature below the foaming threshold value of oxygen, and melting to grow.
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公开(公告)号：JP2001251179A
公开(公告)日：2001-09-14
申请号：JP2000063366
申请日：2000-03-03
Applicant: FUJITSU LTD , INT SUPERCONDUCTIVITY TECH
Inventor： SUZUKI HIDEO , MIYAHARA KAZUNORI , ENOMOTO YOICHI
IPC: H01L39/22 , H03K19/195
Abstract: PROBLEM TO BE SOLVED: To prevent a bias current supplied to a Josephson junction from flowing to a circuit adjacent to the Josephson junction and from interfering. SOLUTION: A single magnetic flux quantum basic logic gate 10 is conencted to a single magnetic flux quantum basic logic gate 11 through a Josephson transfer line 13. In the Josephson transfer line 13, a resistor R1 is connected in series to an inductance L1. The value R of the resistor R1 is decided so that the time constant L/R of the series connection circuit of the superconducting inductance L1 with a value L and the resistor R1 becomes larger than a switching time and it satisfies R
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