公开(公告)号：US06631280B1

公开(公告)日：2003-10-07

申请号：US09380272

申请日：1999-08-27

申请人： Soji Otabe ,  Teruo Matsushita ,  Jun Fujikami ,  Kazuya Ohmatsu

发明人： Soji Otabe ,  Teruo Matsushita ,  Jun Fujikami ,  Kazuya Ohmatsu

IPC分类号： H01B1200

CPC分类号： H01L39/143

摘要： A low-loss oxide superconducting wire using a reversible phenomenon is disclosed. The oxide superconducting wire is formed with a metal-coated multi-filamentary superconductor having a plurality of superconducting filaments in a matrix, in which d≦2 &mgr;m  (1), and d/(2&lgr;0′)≦1  (2), where d represents the size of the superconducting filament, and &lgr;0′ represents penetration depth of Campbell's a.c. magnetic field.

摘要翻译： 公开了一种使用可逆现象的低损耗氧化物超导线。 氧化物超导线由在基体中具有多根超导细丝的金属涂覆的多丝超导体形成，其中d表示超导细丝的尺寸，并且lambd0'表示坎贝尔的a.c.的穿透深度。 磁场。

公开(公告)号：US06305069B1

公开(公告)日：2001-10-23

申请号：US08627281

申请日：1996-04-04

申请人： Jun Fujikami ,  Nobuhiro Saga ,  Kazuya Ohmatsu ,  Kenichi Sato

发明人： Jun Fujikami ,  Nobuhiro Saga ,  Kazuya Ohmatsu ,  Kenichi Sato

IPC分类号： H01L3924

CPC分类号： H01F6/06 ,  C23C26/00 ,  C23C30/00 ,  H01L39/143 ,  H01L39/248 ,  Y10S505/701 ,  Y10S505/702 ,  Y10S505/703 ,  Y10S505/704 ,  Y10T29/49014

摘要： Provided are an oxide superconducting wire which maintains a high critical current density and has a small current drift with small ac loss when the same carries an alternating current and a method of preparing the same, and a cable conductor which is formed by assembling such oxide superconducting wires. The oxide superconducting wire is a flat-molded stranded wire which is formed by twisting a plurality of metal-coated strands consisting of an oxide superconductor, and is characterized in that the flat-molded stranded wire has a rectangular sectional shape, and a section of each strand forming the flat-molded stranded wire has an aspect ratio (W1/T1) of at least 2. The method of preparing this oxide superconducting wire comprises the steps of preparing a stranded wire by twisting a plurality of strands, each of which is formed by metal-coating an oxide superconductor or raw material powder therefor, flat-molding the prepared stranded wire, and repeating rolling and a heat treatment of at least 800° C. on the flat molded stranded wire a plurality of times.

摘要翻译： 提供一种氧化物超导线材，其保持高的临界电流密度，并且当相同的交流电流具有小的交流损耗时具有小的电流漂移及其制备方法，以及通过组装这种氧化物超导体形成的电缆导体 电线 氧化物超导线是通过扭转由氧化物超导体组成的多个金属涂敷线形成的扁平成形绞合线，其特征在于，所述扁平成形绞线具有矩形截面形状，并且部分 形成平线状绞合线的每条线的纵横比（W1 / T1）至少为2.制造该氧化物超导线的方法包括以下步骤：通过扭绞多条绞线来制备绞线， 通过金属涂覆氧化物超导体或其原料粉末形成，对制备的绞线进行平直成型，并且在扁平成型绞合线上多次重复进行至少800℃的滚压和热处理。

公开(公告)号：US06271474B1

公开(公告)日：2001-08-07

申请号：US09188242

申请日：1998-11-09

申请人： Jun Fujikami ,  Nobuhiro Saga ,  Shuji Hahakura ,  Kazuya Ohmatsu ,  Hideo Ishii ,  Shoichi Honjo ,  Yoshihiro Iwata

发明人： Jun Fujikami ,  Nobuhiro Saga ,  Shuji Hahakura ,  Kazuya Ohmatsu ,  Hideo Ishii ,  Shoichi Honjo ,  Yoshihiro Iwata

IPC分类号： H01B1208

CPC分类号： H01L39/248 ,  Y10S505/887

摘要： An oxide superconducting stranded wire having inter-strand insulation and high critical current is provided. A wire including an oxide superconducting material and a matrix covering the material and consisting essentially of silver or a silver alloy is coated with a paint containing, as a main component, an organometallic polymer such as a silicone polymer or aluminum primary phosphorus in a paint reservoir, and the paint is baked in a baking furnace via a drying furnace. A plurality of such wires with the baked paint are twined into a stranded wire, which is then heated up to a temperature necessary for sintering the oxide superconducting material. The stranded wire thus obtained through the step of sintering may have high critical current. A heat-resisting insulating coating layer may be formed by baking the paint.

摘要翻译： 提供具有线间绝缘和高临界电流的氧化物超导绞线。 包含氧化物超导材料的线材和覆盖材料并基本上由银或银合金组成的基体涂覆有在油漆储存器中包含作为主要成分的有机金属聚合物如有机硅聚合物或铝一次磷的涂料 ，并通过干燥炉在烤炉中烘烤。 将多个具有烘烤漆的这种线材缠绕成绞线，然后将其加热至烧结氧化物超导材料所需的温度。 由此获得的通过烧结步骤的绞合线可能具有高临界电流。 可以通过烘烤涂料来形成耐热绝缘涂层。

公开(公告)号：US06566609B2

公开(公告)日：2003-05-20

申请号：US09954577

申请日：2001-09-18

申请人： Jun Fujikami ,  Nobuhiro Saga ,  Kazuya Ohmatsu ,  Kenichi Sato

发明人： Jun Fujikami ,  Nobuhiro Saga ,  Kazuya Ohmatsu ,  Kenichi Sato

IPC分类号： H01B1200

CPC分类号： H01F6/06 ,  C23C26/00 ,  C23C30/00 ,  H01L39/143 ,  H01L39/248 ,  Y10S505/701 ,  Y10S505/702 ,  Y10S505/703 ,  Y10S505/704 ,  Y10T29/49014

摘要： Provided are an oxide superconducting wire which maintains a high critical current density and has a small current drift with small ac loss when the same carries an alternating current and a method of preparing the same, and a cable conductor which is formed by assembling such oxide superconducting wires. The oxide superconducting wire is a flat-molded stranded wire which is formed by twisting a plurality of metal-coated strands consisting of an oxide superconductor, and is characterized in that the flat-molded stranded wire has a rectangular sectional shape, and a section of each strand forming the flat-molded stranded wire has an aspect ratio (W1/T1) of at least 2. The method of preparing this oxide superconducting wire comprises the steps of preparing a stranded wire by twisting a plurality of strands, each of which is formed by metal-coating an oxide superconductor or raw material powder therefor, flat-molding the prepared stranded wire, and repeating rolling and a heat treatment of at least 800° C. on the flat molded stranded wire a plurality of times.

公开(公告)号：US06546614B2

公开(公告)日：2003-04-15

申请号：US09920947

申请日：2001-08-03

申请人： Tetsuyuki Kaneko ,  Naoki Ayai ,  Jun Fujikami ,  Shinichi Kobayashi

发明人： Tetsuyuki Kaneko ,  Naoki Ayai ,  Jun Fujikami ,  Shinichi Kobayashi

IPC分类号： H01L3924

CPC分类号： H01L39/248 ,  Y10T29/49014

摘要： The diameter of a first metal tube charged with raw material powder is reduced for obtaining an elementary wire. A plurality of such elementary wires are charged into a second metal tube, which in turn is reduced in diameter for obtaining a round first wire having a plurality of first filaments. The first wire is uniaxially compressed thereby obtaining a tape-like second wire having a plurality of second filaments. The second wire is heat treated thereby obtaining an oxide superconducting wire including a plurality of superconductor filaments. The maximum grain size of the raw material powder is smaller than the minor diameter of the first or second filaments.

公开(公告)号：US5932523A

公开(公告)日：1999-08-03

申请号：US326298

申请日：1994-10-19

申请人： Jun Fujikami ,  Nobuhiro Shibuta ,  Kenichi Sato ,  Tsukushi Hara ,  Hideo Ishii

发明人： Jun Fujikami ,  Nobuhiro Shibuta ,  Kenichi Sato ,  Tsukushi Hara ,  Hideo Ishii

IPC分类号： H01B12/12 ,  C04B35/00 ,  H01B12/02 ,  H01B12/06 ,  H01L39/14 ,  H01L39/24

CPC分类号： H01L39/143 ,  H01L39/248

摘要： In order to provide a flexible oxide superconducting cable conductor which is reduced in ac loss, tape-shaped multifilamentary superconducting wires covered with a stabilizing metal are spirally wound on a flexible former. Each of the multifilamentary superconducting wires has a plurality of filaments. The filament contains an oxide superconductor. The superconducting wires are preferably wound on the former at a bending strain of not more than 0.3 %. In winding on the former, a prescribed number of tape-shaped multifilamentary superconducting wires are wound on a core member in a side-by-side manner, to form a first layer. Then, an insulating layer is provided on the first layer. This insulating layer can be formed by an insulating tape. A prescribed number of tape-shaped superconducting multifilamentary wires are wound on the insulating layer in a side-by-side manner, to form a second layer. The insulating layer is adapted to reduce ac loss of the conductors. When the former is made of a metal, it is more preferable to provide an insulating layer between the former and the multifilamentary superconducting wires.

摘要翻译： 为了提供减少交流损耗的柔性氧化物超导电缆导体，用稳定金属覆盖的带状多丝超导线被螺旋缠绕在柔性成形器上。 每根多丝超导线具有多根长丝。 灯丝包含氧化物超导体。 超导线优选以不大于0.3％的弯曲应变缠绕在前者上。 在卷绕在前者上时，规定数量的带状复丝超导线以并列方式卷绕在芯部件上，形成第一层。 然后，在第一层上设置绝缘层。 该绝缘层可以由绝缘带形成。 规定数量的带状超导复丝线并排缠绕在绝缘层上，形成第二层。 绝缘层适于减少导体的交流损耗。 当前者由金属制成时，更优选在前者和多丝超导线之间设置绝缘层。

公开(公告)号：US20060264331A1

公开(公告)日：2006-11-23

申请号：US10553171

申请日：2004-10-27

申请人： Munetsugu Ueyama ,  Jun Fujikami

发明人： Munetsugu Ueyama ,  Jun Fujikami

IPC分类号： H01L39/24

CPC分类号： H01L39/143 ,  H01L39/248 ,  H01L2924/0002 ,  H01L2924/00

摘要： There is provided a superconducting wire that has a high critical current density and is less likely to suffer longitudinal cracking and breakage during the steps of manufacturing the same. The superconducting wire according to the present invention is an oxide superconducting wire including an oxide superconductor and a cladding metal for cladding the oxide superconductor, and is characterized in that a material of the cladding metal has a breaking strain of at least 30% in a stress-strain test.

摘要翻译： 提供了具有高临界电流密度的超导线，并且在其制造步骤期间不太可能遭受纵向破裂和断裂。 根据本发明的超导线是包括氧化物超导体和包覆氧化物超导体的包层金属的氧化物超导线，其特征在于，包层金属的材料在应力下具有至少30％的断裂应变 - 应试

公开(公告)号：US5358929A

公开(公告)日：1994-10-25

申请号：US19976

申请日：1993-02-19

申请人： Jun Fujikami ,  Kenichi Sato ,  Nobuhiro Shibuta ,  Hidehito Mukai ,  Takeshi Kato

发明人： Jun Fujikami ,  Kenichi Sato ,  Nobuhiro Shibuta ,  Hidehito Mukai ,  Takeshi Kato

IPC分类号： H01F6/06 ,  H01L39/02 ,  H01R4/68 ,  H01R43/00

CPC分类号： H01F6/065 ,  H01L39/02 ,  H01R4/68 ,  Y10S505/925

摘要： Disclosed herein is a method which enables permanent current junction of a tape-type oxide superconducting wire and suppresses reduction of its critical current. An end portion of a tape-type wire (10) to be joined is removed to expose oxide superconductor filaments. Another tape-type wire (10') to be joined with the wire (10) is processed in a similar manner. The tape-type wires (10, 10') are so superposed that the surfaces exposing the filaments face with each other, and the superposed portions are pressed in a direction perpendicular to principal surfaces of the tapes and heat treated at a temperature of 800.degree. to 900.degree. C., to be completely joined with each other.

摘要翻译： 这里公开了一种能够实现带状氧化物超导线的永久电流接合并且抑制其临界电流的降低的方法。 去除要连接的带状导线（10）的端部以暴露氧化物超导体细丝。 与线（10）接合的另一条带状线（10'）以类似的方式被处理。 带状电线（10,10'）重叠，使得暴露于灯丝的表面彼此面对，并且叠置部分沿垂直于带的主表面的方向被按压并在800℃的温度下进行热处理 至900℃，彼此完全接合。

公开(公告)号：US20100227765A1

公开(公告)日：2010-09-09

申请号：US11990147

申请日：2006-09-22

申请人： Eisaku Ueno ,  Takeshi Kato ,  Jun Fujikami

发明人： Eisaku Ueno ,  Takeshi Kato ,  Jun Fujikami

IPC分类号： G01N27/00 ,  G01R19/00

CPC分类号： G01R33/1246 ,  G01R33/072

摘要： A method of measuring the critical current value of a superconducting wire comprises the step of measuring first to mth (m denotes an integer of at least 2) current values (I1, I2, . . . , Im) and first to mth voltage values (V1, V2, . . . , Vm) corresponding to the respective ones of the first to mth current values. The first current value I1 and the first voltage value V1 are measured by retaining the current fed from a constant current source to the superconducting wire in a state set to a first set value I1a for a constant time and thereafter measuring the current flowing through the superconducting wire and a voltage generated in the superconducting wire. The kth (k denotes an integer satisfying 2≦k≦m) current value Ik and the kth voltage value Vk are measured by retaining the current fed from the constant current source to the superconducting wire in a state set to a kth set value Ika higher than a (k−1)th set value for the constant time and thereafter measuring the current flowing through the superconducting wire and the voltage generated in the superconducting wire. Thus, a correct critical current value can be measured.

摘要翻译： 测量超导线的临界电流值的方法包括以下步骤：首先测量（m表示至少为2的整数）电流值（I1，I2，...，Im）和第一至第m电压值 V1，V2，...，Vm）对应于第一至第m电流值中的相应值。 第一电流值I1和第一电压值V1通过将从恒定电流源馈送的电流保持在设定为第一设定值I1a的状态达到恒定时间，然后测量流过超导的电流来测量超导线 电线和在超导线中产生的电压。 第k个（k表示满足2＆nlE; k＆nlE; m）的整数，电流值Ik和第k个电压值Vk是通过将恒定电流源馈送到超导线的电流保持在设定为第k个设定值Ika的状态下来测量的 比第（k-1）个恒定时间的设定值，然后测量流过超导线的电流和在超导线中产生的电压。 因此，可以测量正确的临界电流值。

公开(公告)号：US07743485B1

公开(公告)日：2010-06-29

申请号：US11525262

申请日：2006-09-22

申请人： Jun Fujikami

发明人： Jun Fujikami

IPC分类号： H01B12/02 ,  H01B13/00 ,  H02H7/26

CPC分类号： H01B12/02 ,  H01R4/68 ,  H02G15/34 ,  Y02E40/641 ,  Y02E40/648 ,  Y10T29/49014

摘要： Provided is a superconducting cable having a structure such that cable cores, each having a superconducting layer, are housed in a thermal insulation pipe and the superconducting layer of each cable core has portions having different critical current values. When an excessive current flows in the superconducting layer in case of a short-circuit failure, the current exceeds the critical current value of the portion having a smaller critical current value first, which results in damage to the portion, suppressing the occurrence of damage to the other normal portion. A superconducting cable line using this superconducting cable and a splitter for accommodating the cable cores therein is also provided.

摘要翻译： 提供了一种超导电缆，其结构使得每个具有超导层的电缆芯被容纳在绝热管中，并且每个电缆芯的超导层具有不同临界电流值的部分。 当在短路故障的情况下在超导层中流过大电流时，电流首先超过临界电流值较小的部分的临界电流值，导致部分损坏，抑制损坏的发生 另一个正常部分。 还提供了使用这种超导电缆的超导电缆线和用于在其中容纳电缆芯的分配器。