JP2003281950A - Oxide superconductor current lead - Google Patents
Oxide superconductor current leadInfo
- Publication number
- JP2003281950A JP2003281950A JP2002080208A JP2002080208A JP2003281950A JP 2003281950 A JP2003281950 A JP 2003281950A JP 2002080208 A JP2002080208 A JP 2002080208A JP 2002080208 A JP2002080208 A JP 2002080208A JP 2003281950 A JP2003281950 A JP 2003281950A
- Authority
- JP
- Japan
- Prior art keywords
- oxide superconductor
- current lead
- superconductor
- metal
- electrode terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Containers, Films, And Cooling For Superconductive Devices (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、超電導マグネット
等の極低温機器に電流を供給するための電流リードに関
する。TECHNICAL FIELD The present invention relates to a current lead for supplying a current to a cryogenic device such as a superconducting magnet.
【０００２】[0002]
【従来の技術】電流リードとは、室温の電流供給源から
極低温の超電導マグネットに電流を供給する導体のこと
である。従来はＣｕ製の電流リードが一般的であった
が、熱侵入量をさらに低減するために酸化物超電導体を
利用した電流リードが開発されてきている。2. Description of the Related Art A current lead is a conductor that supplies a current from a room temperature current supply source to a cryogenic superconducting magnet. Conventionally, a Cu current lead has been generally used, but a current lead using an oxide superconductor has been developed in order to further reduce the amount of heat penetration.
【０００３】酸化物超電導体を利用した電流リードを外
部電源に接続するためには、特許２８３０５１０号公報
に、「この電流リードを外部電源と接続するには、酸化
物超電導体リードに接続端子として導電性金属を取付け
なければならず、その様な導電性金属としてＡｇあるい
はＡｇを主体とする合金が最も有効であるとされてい
る」と記載されているように、酸化物超電導体に外部と
接続するための電極端子を接続する必要があり、そのよ
うな電極端子としてはＡｇあるいはＡｇ合金が有効であ
ることが知られている。また、木村らの論文（低温工学
30巻、12号（1995年）577頁−582頁）に示されているよ
うに、酸化物超電導体電流リードの電極端子としてＣｕ
製の例もある。To connect a current lead using an oxide superconductor to an external power source, Japanese Patent No. 2830510 discloses, "To connect this current lead to an external power source, the oxide superconductor lead is used as a connection terminal. A conductive metal must be attached. As such a conductive metal, Ag or an alloy mainly composed of Ag is said to be most effective. " It is necessary to connect an electrode terminal for connection, and it is known that Ag or Ag alloy is effective as such an electrode terminal. Also, Kimura et al.
As shown in Vol. 30, No. 12 (1995), 577-582), Cu is used as an electrode terminal of an oxide superconductor current lead.
There is also an example of manufacturing.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、Ａｇや
Ｃｕは電気の良導体といえども、大電流を流すとジュー
ル発熱が発生し、超電導マグネットを冷却している高価
な液体ヘリウムの消費量が大きくなってしまうという問
題がある。AgやCu製の電極端子でジュール発熱を低減す
るには、電極端子の断面積を大きくしなければならない
が、電極端子の大断面積化と共に電極端子の質量は大き
くなるので、酸化物超電導体への機械的負担が大きくな
る。酸化物超電導体電流リードでは、酸化物超電導体の
機械的強度が低いため補強支持体で機械的強度を補強す
ることが行われているが、電極端子部分の質量が大きく
なると、補強支持体の断面積も大きくしなければならな
くなり、補強支持体を伝わって外部から侵入する熱量が
増大してしまう。さらに、電極端子の質量が大きくなる
と、素子としての質量バランスが悪くなるので、取り扱
い時に割れやすくなることや使用寿命が短くなることな
どの問題が発生する可能性が考えられる。本発明は、上
記の問題を解決し、軽量でジュール発熱の小さい酸化物
超電導体電流リードを提供することである。However, even though Ag and Cu are good conductors of electricity, Joule heat is generated when a large current is applied, and the amount of expensive liquid helium that cools the superconducting magnet increases. There is a problem that it will end up. In order to reduce Joule heat generation with Ag or Cu electrode terminals, it is necessary to increase the cross-sectional area of the electrode terminals, but the mass of the electrode terminals increases with the increase of the cross-sectional area of the electrode terminals. The mechanical load on the In the oxide superconductor current lead, the mechanical strength of the oxide superconductor is low, so the mechanical strength is reinforced by the reinforcing support, but when the mass of the electrode terminal part becomes large, The cross-sectional area also has to be increased, and the amount of heat that penetrates from the outside through the reinforcing support increases. Further, when the mass of the electrode terminal becomes large, the mass balance of the element is deteriorated, so that there is a possibility that problems such as breakage during handling and shortened service life may occur. The present invention solves the above problems and provides an oxide superconductor current lead which is lightweight and has a small Joule heat generation.
【０００５】[0005]
【課題を解決するための手段】本発明による酸化物超電
導体電流リードは、酸化物超電導体と、該酸化物超電導
体の両端に接続した電極端子からなる電流リードにおい
て、電極端子の少なくとも１つを金属超電導体と安定化
材とからなる複合金属超電導体としたことを特徴とする
酸化物超電導体電流リードである。また、このような酸
化物超電導体電流リードであって、金属超電導体が、Nb
−Ti系材料、Nb−Sn系材料、Nb−Al系材料、 Mg−B系材
料のいずれかであることを特徴とする。また、このよう
な酸化物超電導体電流リードであって、複合金属超電導
体が、NbTi／Nb／Cuの超電導体多層板であることを特徴
とする。また、酸化物超電導体と、該酸化物超電導体の
両端に接続した電極端子からなる酸化物超電導体電流リ
ードにおいて、電極端子の少なくとも１つを酸化物超電
導体と安定化材とからなる複合酸化物超電導体としたこ
とを特徴とする酸化物超電導体電流リードである。The oxide superconductor current lead according to the present invention comprises at least one of the electrode terminals in the current lead comprising the oxide superconductor and the electrode terminals connected to both ends of the oxide superconductor. Is a composite metal superconductor composed of a metal superconductor and a stabilizing material. Moreover, in such an oxide superconductor current lead, the metal superconductor is
It is characterized in that it is any one of -Ti-based material, Nb-Sn-based material, Nb-Al-based material, and Mg-B-based material. Further, in such an oxide superconductor current lead, the composite metal superconductor is a NbTi / Nb / Cu superconductor multilayer plate. Further, in an oxide superconductor current lead comprising an oxide superconductor and electrode terminals connected to both ends of the oxide superconductor, at least one of the electrode terminals is a composite oxide comprising an oxide superconductor and a stabilizer. It is an oxide superconductor current lead characterized by being a superconductor.
【０００６】本発明の酸化物超電導体電流リードによる
と、電極端子が複合金属超電導体や複合酸化物超電導体
であるので、液体Heなどの冷媒中では電気抵抗がゼロと
なり、電極端子自体にはジュール発熱がなく、電極端子
の断面積を小さくできることで軽量化も図ることができ
る。According to the oxide superconductor current lead of the present invention, since the electrode terminal is the composite metal superconductor or the composite oxide superconductor, the electric resistance becomes zero in the refrigerant such as liquid He and the electrode terminal itself Since Joule heat is not generated and the cross-sectional area of the electrode terminal can be reduced, the weight can be reduced.
【０００７】本発明に用いる酸化物超電導体は、酸化物
超電導体であれば Y系、Bi系など特に制限されるもので
はないが、ピンニング力の強い酸化物超電導体の方がよ
り強い漏洩磁場中でも動作可能であるので好ましい。ピ
ンニング力の強い酸化物超電導体の例としては、QMG材
と呼ばれるもので、単結晶状のREBa2Cu3Ox相（REはYま
たは希土類元素およびその組み合わせ）中に RE2BaCuO5
相が微細分散している酸化物超電導体がある。The oxide superconductor used in the present invention is not particularly limited as long as it is an oxide superconductor such as a Y system or a Bi system, but an oxide superconductor having a strong pinning force has a stronger leakage magnetic field. Among them, it is preferable because it can operate. An example of an oxide superconductor having a strong pinning force is what is called a QMG material, and RE 2 BaCuO 5 is contained in a single-crystal REBa 2 Cu 3 O x phase (RE is Y or a rare earth element and a combination thereof).
There are oxide superconductors in which the phases are finely dispersed.
【０００８】また、本発明に用いる複合金属超電導体
は、金属超電導体と安定化材とからなるもので、金属超
電導体としては、NbTi、Nb3Sn、Nb3Al、MgB2などの臨界
電流密度の高いものが好ましく、安定化材としてはCu、
Ag、Alあるいはその合金などの熱伝導率がよいものが好
ましい。複合金属超電導体としては、いわゆる金属超電
導線材があるが、電流リード本体として用いる酸化物超
電導体との接続面積を大きくとるために、丸形状の線材
よりもテープ形状の線材の方が好ましい。さらに接続面
積を大きくとれる複合金属超電導体の形状に関しては板
形状のものの方が好ましく、板形状の複合金属超電導体
としては、金属超電導体としてのNb−Ti系合金層と常電
導金属層が交互に積層した金属超電導多層板が超電導安
定性があって好ましい。The composite metal superconductor used in the present invention is composed of a metal superconductor and a stabilizing material. As the metal superconductor, a critical current such as NbTi, Nb 3 Sn, Nb 3 Al or MgB 2 is used. A high density is preferable, and Cu is used as a stabilizer.
A material having a good thermal conductivity such as Ag, Al or an alloy thereof is preferable. As the composite metal superconductor, there is a so-called metal superconducting wire, but a tape-shaped wire is preferable to a round-shaped wire in order to increase the connection area with the oxide superconductor used as the current lead body. Further, regarding the shape of the composite metal superconductor that can have a large connection area, the plate-shaped composite metal superconductor is preferable, and as the plate-shaped composite metal superconductor, the Nb-Ti alloy layer and the normal-conductivity metal layer as the metal superconductor are alternated. The metal superconducting multi-layer plate laminated on is preferable because it has superconducting stability.
【０００９】また、本発明に用いる複合酸化物超電導体
は、酸化物超電導体と安定化材とからなるもので、酸化
物超電導体としてはBi系、Y系、Tl 系など臨界電流密度
が高いものが好ましく、安定化材としてはCu、Ag、Alあ
るいはその合金などの熱伝導率がよいものが好ましい。
複合酸化物超電導体としては、いわゆる酸化物超電導線
材があるが、電流リード本体として用いる酸化物超電導
体との接続面積を大きくとるために、丸形状の線材より
もテープ形状の線材の方が好ましい。The complex oxide superconductor used in the present invention is composed of an oxide superconductor and a stabilizer, and the oxide superconductor has a high critical current density such as Bi type, Y type and Tl type. As the stabilizer, those having good thermal conductivity such as Cu, Ag, Al or alloys thereof are preferable as the stabilizer.
As a complex oxide superconductor, there is a so-called oxide superconducting wire, but a tape-shaped wire is preferable to a round-shaped wire in order to increase the connection area with the oxide superconductor used as the current lead body. .
【００１０】これらの複合超電導体からなる電極端子
は、少なくとも極低温機器側の端子に用いることが、極
低温機器への外部入熱を抑制できることから好ましい。
もう一方の電極端子は複合超電導体と金属のいずれでも
構わない。なお、金属製の電極端子は、電気的良導体の
観点からＣｕやＡｇ等の材質が好ましい。It is preferable that the electrode terminal made of these composite superconductors is used at least as a terminal on the cryogenic device side because the external heat input to the cryogenic device can be suppressed.
The other electrode terminal may be either a composite superconductor or a metal. The metal electrode terminal is preferably made of a material such as Cu or Ag from the viewpoint of a good electrical conductor.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態を添付
の図面に基づいて詳述する。図１は、本発明に基づいた
酸化物超電導体電流リードの一実施形態を示す構造概略
図および外観側面図である。図１では、酸化物超電導体
１の一端に複合金属超電導体として金属超電導多層板を
用いた電極端子２が接続しており、酸化物超電導体の他
端にはCu製の電極端子３が接続している。この場合、金
属超電導多層板製電極端子２が低温側に、Cu製電極端子
３が高温側になる。金属超電導多層板を酸化物超電導体
電流リードの電極端子に用いることにより、電極端子の
幅や厚さを小さくできる。さらに、電極端子自体にはジ
ュール発熱がないので、電極端子と酸化物超電導体との
接続部分の面積も小さくできる。また、図１では、酸化
物超電導体電流リードの機械的強度を改善するために補
強支持体４を用いている。補強支持体としては、剛性が
あり熱伝導率が比較的小さいものであればよく、例えば
繊維強化プラスチック、ステンレス、チタンおよびチタ
ン合金、銅合金、フィラー配合樹脂、ベークライト等な
どが好ましい。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a structural schematic view and an external side view showing an embodiment of an oxide superconductor current lead according to the present invention. In FIG. 1, an electrode terminal 2 using a metal superconducting multilayer plate as a composite metal superconductor is connected to one end of the oxide superconductor 1, and a Cu electrode terminal 3 is connected to the other end of the oxide superconductor. is doing. In this case, the metal superconducting multilayer plate electrode terminal 2 is on the low temperature side and the Cu electrode terminal 3 is on the high temperature side. By using the metal superconducting multilayer plate as the electrode terminal of the oxide superconductor current lead, the width and thickness of the electrode terminal can be reduced. Further, since the electrode terminal itself does not generate Joule heat, the area of the connecting portion between the electrode terminal and the oxide superconductor can be reduced. Further, in FIG. 1, the reinforcing support 4 is used to improve the mechanical strength of the oxide superconductor current lead. As the reinforcing support, one having rigidity and relatively low thermal conductivity may be used, and for example, fiber reinforced plastic, stainless steel, titanium and titanium alloys, copper alloys, filler-containing resin, bakelite and the like are preferable.
【００１２】本発明による軽量化とジュール発熱低減の
効果を調べるため、1000 A通電の場合について、金属超
電導多層板製電極端子と銅製電極端子とで質量とジュー
ル発熱量を比較した。金属超電導多層板としてはNb−Ti
系合金層と常電導金属層が交互に積層した金属超電多層
板を用い、銅としては無酸素銅を用いた。金属超電導多
層板の場合、液体He中で１Tの磁場強度では臨界電流密
度は2000A/mm2であるが、磁束ジャンプに伴うクエンチ
現象を抑制するため臨界電流密度の１／４の電流密度50
0A/mm2で設計すると、1000 A通電用としては金属超電導
多層板製電極端子の必要断面積は2mm2となる。電極端子
長さ100 mmのものを製作すると、その質量は1.6ｇであ
った。一方、銅端子の場合、前述の木村らの論文 （低
温工学、３０巻、１２号（１９９５年）５７７頁−５８
２頁）に記載されているように、液体He中での定常通電
可能な電流密度は50A/mm2であるので、1000A通電用とし
ては銅製電極端子の必要断面積は20mm2となる。電極端
子長さ100mmのものを製作すると、その質量は18ｇであ
った。従って、質量は1/10以下に軽量化できることが確
認できた。In order to investigate the effects of weight reduction and Joule heat generation according to the present invention, the mass and Joule heat generation amount were compared between the metal superconducting multilayer plate electrode terminal and the copper electrode terminal in the case of 1000 A current application. Nb-Ti as a metal superconducting multilayer plate
A metal superconducting multilayer plate in which a system alloy layer and a normal conducting metal layer were alternately laminated was used, and oxygen-free copper was used as copper. In the case of a metal superconducting multi-layer plate, the critical current density is 2000 A / mm 2 in a magnetic field strength of 1 T in liquid He, but the current density is 1/4 of the critical current density in order to suppress the quench phenomenon accompanying the flux jump.
When designed at 0 A / mm 2 , the required cross-sectional area of the metal superconducting multilayer plate electrode terminal is 2 mm 2 for 1000 A current application. When the electrode terminal having a length of 100 mm was manufactured, the mass was 1.6 g. On the other hand, in the case of copper terminals, the aforementioned paper by Kimura et al. (Cryogenics, Vol. 30, No. 12 (1995) 577-58).
As described in (page 2), since the current density that can be constantly energized in liquid He is 50 A / mm 2 , the required cross-sectional area of the copper electrode terminal is 20 mm 2 for 1000 A energization. When the electrode terminal having a length of 100 mm was manufactured, the mass was 18 g. Therefore, it was confirmed that the weight can be reduced to 1/10 or less.
【００１３】ジュール発熱に関しては、銅製端子の場合
1000A通電時に 0.9Wのジュール発熱が生じたが、金属超
電導多層板製電極端子自体にはジュール発熱がない。
従って、ジュール発熱は大幅に低減することが確認でき
た。さらに、銅端子の場合、断面積を１０倍にすること
によりジュール発熱を１／１０の０.０９Wと小さくでき
るが、質量は１０倍の180gになる。このように、ジュー
ル発熱の許容値を低く設定すればするほど、本発明の軽
量化の効果は顕著になる。Regarding Joule heat generation, in the case of copper terminals
0.9 W of Joule heat was generated when 1000 A was energized, but the Joule heat was not generated in the metal superconducting multilayer plate electrode terminals themselves.
Therefore, it was confirmed that the Joule heat generation was significantly reduced. Furthermore, in the case of a copper terminal, Joule heat generation can be reduced to 0.09 W, which is 1/10, by increasing the cross-sectional area 10 times, but the mass is 10 times 180 g. As described above, the lower the allowable value of Joule heat generation is, the more remarkable the effect of the present invention is in weight reduction.
【００１４】図２は、本発明に基づいた酸化物超電導体
電流リードの別の実施形態を示す構造概略図である。図
２では、酸化物超電導体６の両端に複合金属超電導体と
して金属超電導多層板を用いた電極端子７が接続してお
り、質量も大幅に軽量化できる。この場合、酸化物超電
導体電流リードの高温端側の温度を電極端子に用いた金
属超電導体の臨界温度以下にしなければならない。例え
ば、Nb−Ti系合金層と常電導金属層が交互に積層した金
属超電導多層板の場合には、１０ K以下にする必要があ
る。図２のような酸化物超電導体電流リードは、通常の
液体He（4.2K）から超流動状態の He（2.17K）への電流
リードとして適している。図中８は補強支持体である。FIG. 2 is a structural schematic diagram showing another embodiment of an oxide superconductor current lead according to the present invention. In FIG. 2, electrode terminals 7 using a metal superconducting multilayer plate as a composite metal superconductor are connected to both ends of the oxide superconductor 6, and the mass can be significantly reduced. In this case, the temperature on the high temperature end side of the oxide superconductor current lead must be below the critical temperature of the metal superconductor used for the electrode terminal. For example, in the case of a metal superconducting multilayer plate in which Nb-Ti alloy layers and normal-conducting metal layers are alternately laminated, the temperature needs to be 10 K or less. The oxide superconductor current lead as shown in Fig. 2 is suitable as a current lead from normal liquid He (4.2K) to He (2.17K) in a superfluid state. In the figure, 8 is a reinforcing support.
【００１５】図３と図４は、本発明に基づいた酸化物超
電導体電流リードの別の実施形態を示す構造概略図であ
る。図３では、複合金属超電導体として金属超電導多層
板を用いた電極端子１１の厚さを 0.5ｍｍ以下より薄く
して、電極端子に柔軟性を持たせた例で、他の部分は図
１と同様である。図４では、複合金属超電導体として金
属超電導線材あるいは複合酸化物超電導体として酸化物
超電導線材を用いた電極端子１４とすることによって、
電極端子に柔軟性を持たせた例である。超電導線材を用
いる場合、電流リード本体として用いる酸化物超電導体
１３との接続抵抗を低減するために、超電導線材を電流
リード本体の酸化物超電導体１３に何重にも巻き付け実
質的な接続面積を大きくする必要がある。このように電
極端子に柔軟性を持たせることで、熱収縮による熱応力
を緩和できることや、超電導マグネットへの接続線とし
て利用できるという利点が生じる。図中１５は補強支持
体である。3 and 4 are structural schematic diagrams showing another embodiment of the oxide superconductor current lead according to the present invention. In FIG. 3, the thickness of the electrode terminal 11 using a metal superconducting multilayer plate as a composite metal superconductor is made thinner than 0.5 mm or less to give flexibility to the electrode terminal. It is the same. In FIG. 4, the electrode terminal 14 uses a metal superconducting wire as the composite metal superconductor or an oxide superconducting wire as the composite oxide superconductor.
This is an example in which the electrode terminals have flexibility. When a superconducting wire is used, in order to reduce the connection resistance with the oxide superconductor 13 used as the current lead body, the superconducting wire is wound around the oxide superconductor 13 of the current lead body in multiple layers to form a substantial connection area. Need to be bigger. By providing the electrode terminals with flexibility in this manner, there are advantages that the thermal stress due to thermal contraction can be relaxed and that the electrode terminals can be used as a connecting wire to the superconducting magnet. Reference numeral 15 in the drawing is a reinforcing support.
【００１６】[0016]
【発明の効果】本発明の酸化物超電導体電流リードによ
れば、軽量でジュール発熱の小さい酸化物超電導体電流
リードを提供できるので工業上顕著な効果を奏すること
ができる。According to the oxide superconductor current lead of the present invention, it is possible to provide an oxide superconductor current lead which is light in weight and has a small Joule heat generation, so that it is possible to achieve a remarkable industrial effect.
【図１】本発明の酸化物超電導体電流リードの一実施例
の構造概略図である。FIG. 1 is a structural schematic view of one embodiment of an oxide superconductor current lead of the present invention.
【図２】本発明の酸化物超電導体電流リードの別の実施
例の構造概略図である。FIG. 2 is a structural schematic view of another embodiment of the oxide superconductor current lead of the present invention.
【図３】本発明の酸化物超電導体電流リードの別の実施
例の構造概略図である。FIG. 3 is a structural schematic view of another embodiment of the oxide superconductor current lead of the present invention.
【図４】本発明の酸化物超電導体電流リードの別の実施
例の構造概略図である。FIG. 4 is a structural schematic view of another embodiment of the oxide superconductor current lead of the present invention.
１ 酸化物超電導体
２ 金属超電導多層板製電極端子
３ Cu製電極端子
４ 補強支持体
６ 酸化物超電導体
７ 金属超電導多層板製電極端子
８ 補強支持体
１１ 金属超電導多層板製電極端子
１３ 酸化物超電導体
１４ 金属超電導線材製電極端子または酸化物超電導
線材製電極端子
１５ 補強支持体1 Oxide Superconductor 2 Metal Superconducting Multilayer Plate Electrode Terminal 3 Cu Electrode Terminal 4 Reinforcement Support 6 Oxide Superconductor 7 Metal Superconducting Multilayer Plate Electrode Terminal 8 Reinforcement Support 11 Metal Superconducting Multilayer Plate Electrode Terminal 13 Oxide Superconductor 14 Metal superconducting wire electrode terminal or oxide superconducting wire electrode terminal 15 Reinforcement support
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大塚 広明 千葉県富津市新富20−１ 新日本製鐵株式 会社技術開発本部内 Ｆターム(参考） 4M114 AA02 AA10 AA24 AA25 AA29 CC03 CC05 DB02 5G321 AA11 BA05 CA41 CA46 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroaki Otsuka 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel shares Company Technology Development Division F-term (reference) 4M114 AA02 AA10 AA24 AA25 AA29 CC03 CC05 DB02 5G321 AA11 BA05 CA41 CA46
Claims (4)
両端に接続した電極端子からなる酸化物超電導体電流リ
ードにおいて、電極端子の少なくとも１つを金属超電導
体と安定化材とからなる複合金属超電導体としたことを
特徴とする酸化物超電導体電流リード。1. An oxide superconductor current lead comprising an oxide superconductor and electrode terminals connected to both ends of the oxide superconductor. At least one of the electrode terminals comprises a metal superconductor and a stabilizing material. An oxide superconductor current lead, which is a composite metal superconductor.
−Sn系材料、Nb−Al系材料、 Mg−B系材料のいずれかで
あることを特徴とする請求項１に記載の酸化物超電導体
電流リード。2. The metal superconductor is Nb-Ti based material, Nb
The oxide superconductor current lead according to claim 1, wherein the oxide superconductor current lead is any one of -Sn-based material, Nb-Al-based material, and Mg-B-based material.
の超電導体多層板であることを特徴とする請求項１に記
載の酸化物超電導体電流リード。3. The composite metal superconductor is NbTi / Nb / Cu.
2. The oxide superconductor current lead according to claim 1, wherein the oxide superconductor current lead is a superconductor multilayer plate.
両端に接続した電極端子からなる酸化物超電導体電流リ
ードにおいて、電極端子の少なくとも１つを酸化物超電
導体と安定化材とからなる複合酸化物超電導体としたこ
とを特徴とする酸化物超電導体電流リード。4. An oxide superconductor current lead comprising an oxide superconductor and electrode terminals connected to both ends of the oxide superconductor, wherein at least one of the electrode terminals comprises an oxide superconductor and a stabilizing material. An oxide superconductor current lead, characterized in that it is a composite oxide superconductor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002080208A JP4012422B2 (en) | 2002-03-22 | 2002-03-22 | Oxide superconductor current lead |
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|---|---|
| JP2003281950A true JP2003281950A (en) | 2003-10-03 |
| JP4012422B2 JP4012422B2 (en) | 2007-11-21 |
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ID=29229331
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