JP4864785B2 - High-temperature superconducting wire, high-temperature superconducting coil and manufacturing method thereof - Google Patents

High-temperature superconducting wire, high-temperature superconducting coil and manufacturing method thereof Download PDF

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JP4864785B2
JP4864785B2 JP2007082426A JP2007082426A JP4864785B2 JP 4864785 B2 JP4864785 B2 JP 4864785B2 JP 2007082426 A JP2007082426 A JP 2007082426A JP 2007082426 A JP2007082426 A JP 2007082426A JP 4864785 B2 JP4864785 B2 JP 4864785B2
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賢司 田崎
泰造 戸坂
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Toshiba Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、極低温に冷却される超電導機器に用いられる高温超電導線材、高温超電導コイルおよびその製造方法に関する。   The present invention relates to a high-temperature superconducting wire, a high-temperature superconducting coil, and a method for manufacturing the same used for a superconducting device cooled to a very low temperature.

Ｙ（イットリウム）系に代表されるＲＥ１２３系薄膜超電導線材は、臨界電流密度が極めて高く、かつ将来的には生産コストが従来のＢｉ系超電導線材と比較すると、数分の１に低減できる試算がなされており、次世代の高温超電導線材として期待されている。なお、ＲＥは、Ｌａ、Ｎｄ、Ｓｍ、Ｅｕ、Ｇｄ、Ｄｙ、Ｈｏ、Ｅｒ、Ｔｍ、Ｙｂ、Ｌｕ及びＹから選択される１種又は２種以上の元素である。こうした薄膜超電導線材は、従来の超電導線材とはその構造が大きく異なっており、Ｎｉ、Ｎｉ合金、ハステロイなどの金属基板上に、中間層と呼ばれるＹＳＺ（イットリウム安定化ジルコニア）やＣｅＯ２に代表される酸化物層、ＲＥ１２３系の超電導層が順次層状に積層されて構成されるものが知られている（特許文献１参照）。 RE123-based thin film superconducting wire represented by Y (yttrium) has an extremely high critical current density, and in the future, production cost can be reduced to a fraction of that of conventional Bi-based superconducting wire. It is expected to be the next generation high temperature superconducting wire. Note that RE is one or more elements selected from La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, and Y. Such a thin film superconducting wire is greatly different in structure from conventional superconducting wires, and is represented by YSZ (yttrium stabilized zirconia) or CeO 2 called an intermediate layer on a metal substrate such as Ni, Ni alloy, and Hastelloy. It is known that an oxide layer and a RE123-based superconducting layer are sequentially laminated in layers (see Patent Document 1).

さらに、基板の上に超電導体片を形成してなるテープ線材２つを超電導体片同士が対向するように合わせて電気的に接続し、両超電導体片を空間上で互いに所定角度で交差し擬似的な撚りを形成してなる超電導テープ線材の構成も知られている（特許文献２参照）。
特開２００３−３２３８２２号公報 特開２００５−８５６１２号公報 Further, two tape wires formed by forming superconductor pieces on the substrate are electrically connected so that the superconductor pieces face each other, and the two superconductor pieces cross each other at a predetermined angle in the space. A configuration of a superconducting tape wire formed by forming a pseudo twist is also known (see Patent Document 2).
JP 2003-323822 A JP-A-2005-85612

上述した薄膜超電導線材における中間層や高温超電導層は１μｍ程度あるいはそれ以下の厚みしか有していない。そのため、線材の厚さ方向に力が加わると、薄い中間層や高温超電導層は剥離してしまうことがあり、信頼性の高い超電導コイルを製作するにあたっての課題となりうることが、近時発明者によって観測された。すなわち、この薄膜超電導線材を巻線して高温超電導コイルを作成する際に、金属基板と高温超電導層とを引き剥がす方向に力が加わるため、超電導特性が劣化することがわかってきた。   The intermediate layer and the high-temperature superconducting layer in the thin film superconducting wire described above have a thickness of about 1 μm or less. Therefore, when a force is applied in the thickness direction of the wire, the thin intermediate layer and the high-temperature superconducting layer may be peeled off, which can be a problem in producing a highly reliable superconducting coil. Observed by. That is, it has been found that when a thin film superconducting wire is wound to produce a high-temperature superconducting coil, a force is applied in the direction of peeling the metal substrate and the high-temperature superconducting layer, so that the superconducting characteristics deteriorate.

本発明はこうした新規に知見した課題を解決するためになされたものであり、超電導特性の劣化の原因となる高温超電導層の引き剥がし力の発生の可能性を従来よりさらに低減することが可能な高温超電導線材、高温超電導コイルとその製造方法を提供することを目的とする。   The present invention has been made to solve these newly discovered problems, and it is possible to further reduce the possibility of generation of the peeling force of the high-temperature superconducting layer that causes deterioration of the superconducting characteristics. An object of the present invention is to provide a high-temperature superconducting wire, a high-temperature superconducting coil, and a manufacturing method thereof.

上記目的を達成するため、本発明は、金属基板上に高温超電導材料からなる高温超電導層を含む複数の層を積層してなる高温超電導線材部品を複数有する高温超電導線材であって、複数の高温超電導線材部品は並列に離間して設けられ、この複数の高温超電導部品の上下にそれぞれ配置される安定化金属層と、この２つの安定化金属層の間を前記複数の高温超電導線材部品の離間領域を含めて電気的に接合する接合部材と、を有することを特徴とする高温超電導線材を提供する。 In order to achieve the above object, the present invention provides a high-temperature superconducting wire having a plurality of high-temperature superconducting wire parts formed by laminating a plurality of layers including a high-temperature superconducting layer made of a high-temperature superconducting material on a metal substrate. The superconducting wire parts are spaced apart from each other in parallel. The stabilizing metal layers respectively disposed above and below the plurality of high temperature superconducting parts, and the spacing between the two stabilizing metal layers between the plurality of high temperature superconducting wire parts. There is provided a high-temperature superconducting wire characterized by having a joining member that is electrically joined including a region.

また、本発明は、金属基板上に高温超電導材料からなる高温超電導層を含む複数の層を積層してなる高温超電導線材であって、前記金属基板上の領域の一部であって前記高温超電導層が形成されないスリット領域と、前記高温超電導層および前記スリット領域の上方に設けられる安定化金属層と、この安定化金属層と前記高温超電導層の間を前記スリット領域を含めて電気的に接合する接合部材と、を有することを特徴とする高温超電導部材を提供する。 The present invention is also a high-temperature superconducting wire obtained by laminating a plurality of layers including a high-temperature superconducting layer made of a high-temperature superconducting material on a metal substrate, wherein the high-temperature superconducting wire is a part of the region on the metal substrate. A slit region in which no layer is formed, the high-temperature superconducting layer and a stabilizing metal layer provided above the slit region, and an electrical connection between the stabilizing metal layer and the high-temperature superconducting layer including the slit region. A high-temperature superconducting member characterized by comprising:

また、本発明は、金属基板上に高温超電導材料からなる高温超電導層を含む複数の層を積層してなる高温超電導線材であって、前記金属基板上の領域の一部であって前記高温超電導層が形成されないスリット領域と、前記高温超電導層および前記スリット領域の上方と、前記金属基板の下方にそれぞれ設けられる２つの安定化金属層と、これら２つの安定化金属層と前記金属基板の間を前記スリット領域を含めて電気的に接合する接合部材と、を有することを特徴とする高温超電導部材を提供する。 The present invention is also a high-temperature superconducting wire obtained by laminating a plurality of layers including a high-temperature superconducting layer made of a high-temperature superconducting material on a metal substrate, wherein the high-temperature superconducting wire is a part of the region on the metal substrate. A slit region where no layer is formed, two stabilizing metal layers provided above the high-temperature superconducting layer and the slit region, and below the metal substrate, and between the two stabilizing metal layers and the metal substrate. A high-temperature superconducting member, comprising: a joining member that electrically joins including the slit region.

さらに、本発明は、金属基板上に高温超電導材料からなる高温超電導層を含む複数の層を積層することで複数の高温超電導線材部品を製作する工程と、この複数の高温超電導線材部品を離間して並列に配置する工程と、この複数の高温超電導部品の上下に安定化金属層を配置する工程と、この２つの安定化金属層の間を前記複数の高温超電導線材部品の離間領域を含めて接合部材により電気的に接合する工程と、を有することを特徴とする高温超電導線材の製造方法を提供する。 Further, the present invention provides a process of manufacturing a plurality of high temperature superconducting wire parts by laminating a plurality of layers including a high temperature superconducting layer made of a high temperature superconducting material on a metal substrate, and separating the plurality of high temperature superconducting wire parts. placing in parallel Te, placing a stabilizing metal layer above and below the plurality of high-temperature superconducting component, between the two stabilizing metal layer including a separation region of said plurality of high-temperature superconducting wire components There is provided a method for producing a high-temperature superconducting wire characterized by comprising a step of electrically joining with a joining member .

また、本発明は、金属基板上に高温超電導材料からなる高温超電導層を含む複数の層を積層するとともに金属基板上の一部の領域を前記高温超電導層が存在しないスリット領域として形成する工程と、前記高温超電導層および前記スリット領域の少なくとも上方に安定化金属層を配置する工程と、この安定化金属層と前記高温超電導層の間を前記スリット領域を含めて接合部材により電気的に接合する工程と、を有することを特徴とする高温超電導部材の製造方法を提供する。 The present invention also includes a step of laminating a plurality of layers including a high-temperature superconducting layer made of a high-temperature superconducting material on a metal substrate and forming a part of the region on the metal substrate as a slit region where the high-temperature superconducting layer is not present. A step of disposing a stabilizing metal layer at least above the high temperature superconducting layer and the slit region, and electrically connecting the stabilizing metal layer and the high temperature superconducting layer including the slit region by a joining member. And a process for producing a high-temperature superconducting member.

本発明によれば、高温超電導層が引き剥がされる可能性を従来よりさらに低減することで、この引き剥がしに起因する超電導特性の劣化の可能性をさらに低減し本来の特性を維持できるように構成された高温超電導線材、高温超電導コイルを実現することができる。   According to the present invention, the possibility that the high-temperature superconducting layer is peeled off is further reduced as compared with the prior art, so that the possibility of deterioration of the superconducting characteristics due to the peeling is further reduced and the original characteristics can be maintained. The high-temperature superconducting wire and the high-temperature superconducting coil thus obtained can be realized.

以下、本発明に係る高温超電導線材および高温超電導コイルの実施例について、図面を参照して説明する。   Embodiments of the high-temperature superconducting wire and the high-temperature superconducting coil according to the present invention will be described below with reference to the drawings.

本発明の実施例１について、図１を参照して説明する。図１（ａ）は、本実施例の高温超電導線材の断面図であり、（ｂ）は（ａ）の一部を抜き出して示した断面図である。   A first embodiment of the present invention will be described with reference to FIG. FIG. 1A is a cross-sectional view of the high-temperature superconducting wire of this example, and FIG. 1B is a cross-sectional view showing a part of (a).

本実施例において高温超電導線材１０を構成するにあたり、まず複数の高温超電導線材部品１Ａ，１Ｂを、一般的にCoated Conductorと呼ばれる線材構造にて複数の層からなる材料として構成する。すなわち、高温超電導線材部品１Ａ，１Ｂは、金属基板４の上に中間層５を介して、Ｒｅ１２３系等の高温超電導材料を含む高温超電導層６が形成される。   In constructing the high-temperature superconducting wire 10 in this embodiment, first, a plurality of high-temperature superconducting wire parts 1A and 1B are constructed as a material composed of a plurality of layers in a wire material structure generally called a Coated Conductor. That is, in the high-temperature superconducting wire parts 1A and 1B, the high-temperature superconducting layer 6 including a high-temperature superconducting material such as Re123 is formed on the metal substrate 4 via the intermediate layer 5.

金属基板４は、例えばハステロイ（登録商標）等のニッケル合金あるいはステンレスで構成され、その上に形成される中間層５の材料としては、例えば、酸化セリウム、酸化マグネシウム、酸化イットリウムなどがあり、結晶成長を促進させる機能を有する。さらにその上に形成される高温超電導層６は、Ｒｅ１２３系等の高温超電導材料からなるあるいはこれを主成分とするものである。   The metal substrate 4 is made of, for example, nickel alloy such as Hastelloy (registered trademark) or stainless steel, and examples of the material of the intermediate layer 5 formed thereon include cerium oxide, magnesium oxide, yttrium oxide, and the like. Has the function of promoting growth. Furthermore, the high-temperature superconducting layer 6 formed thereon is made of a high-temperature superconducting material such as Re123 or the main component thereof.

さらに、この金属基板４、中間層５、高温超電導層６からなる材料の上下に、それぞれ、例えば銀もしくは金あるいはその合金からなる保護金属層７Ａ，７Ｂが形成される。高温超電導材料は一般に他の金属と反応しやすい活性な材料であり、金、銀以外の材料と直接的に接触させると反応して性能低下を引き起こすことがあるため、本実施例のように高温超電導層６の上に保護金属層７Ａを形成してこうした性能低下を防止する。また、保護金属層７Ａは、高温超電導層６に電流が流れているときに常電導転移した場合のバイパス回路としても機能する。 Further, protective metal layers 7A and 7B made of, for example, silver, gold, or an alloy thereof are formed on and under the material made of the metal substrate 4, the intermediate layer 5, and the high-temperature superconducting layer 6, respectively. High-temperature superconducting materials are generally active materials that easily react with other metals, and may react when directly in contact with materials other than gold and silver, resulting in performance degradation. A protective metal layer 7A is formed on the superconducting layer 6 to prevent such performance degradation. The protective metal layer 7 </ b> A also functions as a bypass circuit when a normal conduction transition occurs when a current flows through the high-temperature superconducting layer 6.

本実施例における高温超電導線材１０は、上述した高温超電導線材部品１Ａ，１Ｂを２本並列に配置して上下を２枚の安定化金属層３Ａ，３Ｂで挟み込んだ構造となっている。またこの挟み込み構造ははんだ付けにより実現し、高温超電導線材部品１Ａ，１Ｂと安定化金属層３Ａ，３Ｂとの間ははんだ２により満たされている。かかる構成によって、高温超電導線材部品１Ａ，１Ｂの各層のうち２枚の安定化金属層３Ａ，３Ｂとはんだ２を介して直接接している部分は、保護金属層７Ａおよび７Ｂである。   The high-temperature superconducting wire 10 in this embodiment has a structure in which two high-temperature superconducting wire parts 1A and 1B described above are arranged in parallel and sandwiched between two stabilizing metal layers 3A and 3B at the top and bottom. The sandwiching structure is realized by soldering, and the space between the high-temperature superconducting wire parts 1A and 1B and the stabilizing metal layers 3A and 3B is filled with the solder 2. With this configuration, the portions of the high-temperature superconducting wire parts 1A and 1B that are in direct contact with the two stabilizing metal layers 3A and 3B via the solder 2 are the protective metal layers 7A and 7B.

本実施例において、高温超電導線材１０の厚さ方向すなわち積層方向に引っ張り方向の力が加わると、高温超電導層６を基板から引き剥がそうとする力が加わることになるが、本実施例に示すように、高温超電導層６を一体的に線材に含ませるのではなく高温超電導線材部品として２分してこの高温超電導線材部品１Ａ，１Ｂの中央部にはんだ部位２を設けることにより、高温超電導線材の中央部に支柱を設けたものと同様の作用を実現でき、以って高温超電導層６に加わる引き剥がし力を大幅に緩和することができる。   In this embodiment, when a force in the pulling direction is applied in the thickness direction of the high-temperature superconducting wire 10, that is, the lamination direction, a force is applied to peel off the high-temperature superconducting layer 6 from the substrate. As described above, the high temperature superconducting layer 6 is not integrally included in the wire, but is divided into two as a high temperature superconducting wire part and a solder portion 2 is provided at the center of the high temperature superconducting wire part 1A, 1B. It is possible to achieve the same effect as that provided with a support column at the center of the layer, and thus the peeling force applied to the high-temperature superconducting layer 6 can be greatly relieved.

本発明の実施例２について、図２を参照して説明する。図２は、本実施例に係る高温超電導線材の断面図である。なお、以後の説明においては、上述した実施例と同様の構成については同一符号を付し、重複する説明を省略する。   A second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view of the high temperature superconducting wire according to the present embodiment. In the following description, the same reference numerals are given to the same components as those in the above-described embodiment, and the overlapping description is omitted.

本実施例の高温超電導線材１１は、金属基板４の上に順次中間層５、高温超電導層６、保護金属層７を積層しているが、１本の高温超電導線材の中央部付近の中間層５、高温超電導層６、保護金属層７にスリットＳを入れ、各層をそれぞれスリットＳの左右で分離して中間層５Ａ，５Ｂ、高温超電導層６Ａ，６Ｂ、保護金属層７Ａ，７Ｂとすることにより構成されるものである。またこのスリットＳでは、各層５Ａ，５Ｂ，６Ａ，６Ｂ，７Ａ，７Ｂを形成した段階では金属基板４が剥き出しの状態となっている。この構成は、例えばまず金属基板４上でスリットＳの部分をマスキングして各層を形成し、その後このマスキング部分を取り除くことで実現される。   In the high-temperature superconducting wire 11 of this embodiment, an intermediate layer 5, a high-temperature superconducting layer 6, and a protective metal layer 7 are sequentially laminated on a metal substrate 4, but an intermediate layer near the center of one high-temperature superconducting wire. 5, slits S are formed in the high-temperature superconducting layer 6 and the protective metal layer 7, and the respective layers are separated on the left and right sides of the slit S to form intermediate layers 5A and 5B, high-temperature superconducting layers 6A and 6B, and protective metal layers 7A and 7B. It is comprised by. In the slit S, the metal substrate 4 is exposed at the stage where the layers 5A, 5B, 6A, 6B, 7A, and 7B are formed. This configuration is realized, for example, by first masking the portion of the slit S on the metal substrate 4 to form each layer and then removing the masking portion.

こうしてスリットＳ部分で金属基板４が剥き出しになった状態で、安定化金属層３をはんだ付けにより形成する。すなわち、はんだ２は安定化金属層３と保護金属層７Ａ，７Ｂとを接続しているが、スリットＳにおいては安定化金属層３と金属基板４とがはんだ接合され、この接合面に中間層５Ａ，５Ｂ、高温超電導層６Ａ，６ＢのスリットＳで分岐された部分もはんだ２の接合部分に接している。   With the metal substrate 4 thus exposed at the slit S portion, the stabilizing metal layer 3 is formed by soldering. That is, the solder 2 connects the stabilizing metal layer 3 and the protective metal layers 7A and 7B, but in the slit S, the stabilizing metal layer 3 and the metal substrate 4 are soldered, and an intermediate layer is formed on the joint surface. The portions branched by the slits S of 5A and 5B and the high-temperature superconducting layers 6A and 6B are also in contact with the joint portion of the solder 2.

このように、高温超電導線材１１の中央部において安定化金属層３と金属基板４とをはんだ付けすることにより、上述した実施例１と同様に、高温超電導線材１１の厚さ方向に引っ張り力が加わったときに、高温超電導層６Ａ，６Ｂに加わる力を緩和することができる。   Thus, by soldering the stabilizing metal layer 3 and the metal substrate 4 at the center of the high-temperature superconducting wire 11, a tensile force is applied in the thickness direction of the high-temperature superconducting wire 11 as in the first embodiment. When applied, the force applied to the high temperature superconducting layers 6A and 6B can be relaxed.

なお、金属基板４とはんだ２との間のはんだぬれ性（接続性）が悪い場合は、金属基板４の上に銀などの金属を蒸着するなどにより中間金属層（図示せず）を別途設置し、この中間金属層と安定化金属層３とをはんだ接続することが有効である。   If the solder wettability (connectivity) between the metal substrate 4 and the solder 2 is poor, an intermediate metal layer (not shown) is separately installed on the metal substrate 4 by evaporating metal such as silver. It is effective to solder the intermediate metal layer and the stabilizing metal layer 3 together.

本発明の実施例３について、図３を参照して説明する。図３は、本実施例に係る高温超電導線材の断面図である。なお、以後の説明においては、上述した実施例と同様の構成については同一符号を付し、重複する説明を省略する。   A third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view of the high temperature superconducting wire according to the present embodiment. In the following description, the same reference numerals are given to the same components as those in the above-described embodiment, and the overlapping description is omitted.

本実施例では、まず、金属基板４の上に順次中間層５Ａ，５Ｂ、高温超電導層６Ａ，６Ｂ、保護金属層７Ａ，７Ｂを、それぞれ金属基板４の中央部付近に設けられるスリットＳ’を介して左右分離して積層し、高温超電導線材部品８を構成する。この段階では、高温超電導線材部品８のスリットＳ’では金属基板４が剥き出しの状態となっている。上述の実施例２と同様にスリットＳ’は例えばマスキングにより形成される。   In this embodiment, first, the intermediate layers 5A and 5B, the high-temperature superconducting layers 6A and 6B, and the protective metal layers 7A and 7B are sequentially formed on the metal substrate 4 and the slits S ′ provided near the center of the metal substrate 4 are formed. The high-temperature superconducting wire material component 8 is configured by separating the left and right layers. At this stage, the metal substrate 4 is exposed in the slit S ′ of the high temperature superconducting wire component 8. As in the second embodiment, the slit S ′ is formed by masking, for example.

次に、この高温超電導線材部品８の上下で安定化金属層３Ａ，３Ｂを挟みこんで、安定化金属層３Ａ，３Ｂ間で高温超電導線材部品８との間をはんだ２で接合することによって、高温超電導線材１２を構成するものである。   Next, by sandwiching the stabilizing metal layers 3A and 3B above and below the high-temperature superconducting wire component 8 and joining the high-temperature superconducting wire component 8 with the solder 2 between the stabilizing metal layers 3A and 3B, The high temperature superconducting wire 12 is constituted.

本実施例は、図２に示した実施例２とは、安定化金属層３Ｂが金属基板４の下側に設けられている点で相違するが、基本的構成は実施例２と同様であり、その作用効果も以下の点を除いてほぼ同等である。すなわち、本実施例では、高温超電導線材としての電流密度は第２の実施例に比べてやや低下するものの、高温超電導線材１２の両端においても安定化金属層３Ａおよび３Ｂがはんだ接続されているため、実施例２の場合に比べて高温超電導層６Ａ，６Ｂに加わる力をより緩和することができる。   This embodiment is different from the second embodiment shown in FIG. 2 in that the stabilizing metal layer 3B is provided on the lower side of the metal substrate 4, but the basic configuration is the same as the second embodiment. The effects are almost the same except for the following points. That is, in this embodiment, although the current density as the high-temperature superconducting wire is slightly lower than that in the second embodiment, the stabilizing metal layers 3A and 3B are also solder-connected at both ends of the high-temperature superconducting wire 12. Compared to the case of Example 2, the force applied to the high-temperature superconducting layers 6A and 6B can be more relaxed.

本発明の実施例４について、図４を参照して説明する。図４（ａ）は、本実施例に係る高温超電導コイルの斜視図、図４（ｂ）は（ａ）の矢印ＶＢ方向から見た高温超電導コイル１ターンの断面図である。 For Example 4 of the present invention will be described with reference to FIG. 4 (a) is a perspective view of a high temperature superconducting coil according to the present embodiment, FIG. 4 (b) is a sectional view of a high-temperature superconducting coil 1 turns as viewed from an arrow VB direction (a).

上述の実施例１ないし実施例３において説明した高温超電導線材を巻線して高温超電導コイルを形成することで、上述したように線材そのものが高温超電導性能の劣化を抑止した構造となっていることから、超電導コイルとしても十分な劣化抑止性能を有したものになる。一方、ここでは、高温超電導層の引き剥がし力の発生の可能性をさらに低減しもって高温超電導性能の劣化を抑止するという、上述の各実施例により得られる高温超電導線材を巻線して形成される超電導コイルと同一の課題を解決する超電導コイルの具体的構成として、本実施例における高温超電導コイルの構成について以下説明する。   The high-temperature superconducting wire described in the first to third embodiments is wound to form a high-temperature superconducting coil, so that the wire itself has a structure that suppresses deterioration of the high-temperature superconducting performance as described above. Therefore, the superconducting coil has sufficient deterioration inhibiting performance. On the other hand, here, the high temperature superconducting wire is obtained by winding the high temperature superconducting wire obtained by each of the above embodiments, which further reduces the possibility of generation of the peeling force of the high temperature superconducting layer and suppresses the deterioration of the high temperature superconducting performance. As a specific configuration of the superconducting coil that solves the same problem as the superconducting coil, the configuration of the high-temperature superconducting coil in the present embodiment will be described below.

本実施例における高温超電導コイル２０は、高温超電導線材１３と離形材テープ１４とを共巻きしてなる巻線をエポキシ樹脂１５Ａ，１５Ｂで含浸されて構成されるものである。   The high-temperature superconducting coil 20 in this embodiment is configured by impregnating a winding formed by co-winding the high-temperature superconducting wire 13 and the release material tape 14 with epoxy resins 15A and 15B.

ここでの高温超電導線材１３は、少なくとも、高温超電導材料からなる高温超電導層と、金属基板とを有する線材であればよく、例えば上述した実施例１ないし実施例３における高温超電導層６（６Ａ，６Ｂ）と金属基板４を複数の介在層を介して積層し形成される高温超電導線材１０，１１，１２を用いることが好適であるが、かならずしもこれらには限定されない。   The high-temperature superconducting wire 13 here may be a wire having at least a high-temperature superconducting layer made of a high-temperature superconducting material and a metal substrate. For example, the high-temperature superconducting layer 6 (6A, 6A, Although it is preferable to use the high-temperature superconducting wires 10, 11, and 12 formed by laminating 6B) and the metal substrate 4 via a plurality of intervening layers, it is not necessarily limited thereto.

また、ここで用いられる離形材テープ１４の材質としては、特に、テフロン（登録商標）系あるいはポリイミドアミド系の樹脂が好適である。エポキシ樹脂１５Ａ，１５Ｂの接着力が相対的に弱い材料という意味で、離形材テープ１４とその左右に位置するエポキシ樹脂１５，１６層の界面で力が加わると、両者は容易に剥離する。   Moreover, as a material of the release material tape 14 used here, a Teflon (registered trademark) or polyimide amide resin is particularly suitable. In the sense that the adhesive strength of the epoxy resins 15A and 15B is relatively weak, when a force is applied at the interface between the release material tape 14 and the epoxy resin 15 and 16 layers positioned on the left and right sides thereof, they are easily separated.

このような構成によれば、高温超電導コイル２０において高温超電導線材１３の厚さ方向に引っ張り力が印加される際には、高温超電導線材１３と離形材テープ１４との間に剥離が生じ、両者の間に空間ができる。このように高温超電導線材１３の引っ張り力に対して弱い部分を敢えて設けることにより、引っ張り力が加わったときに、高温超電導線材１３の高温超電導層６と金属基板４との間ではなくそれ以外の部分で剥離が生じることから、高温超電導層６が剥離することを防ぐことができ、以って超電導特性劣化の可能性を低減させることができる。   According to such a configuration, when a tensile force is applied in the thickness direction of the high-temperature superconducting wire 13 in the high-temperature superconducting coil 20, peeling occurs between the high-temperature superconducting wire 13 and the release material tape 14, There is a space between them. In this way, by providing a portion weak to the tensile force of the high-temperature superconducting wire 13, when a tensile force is applied, not between the high-temperature superconducting layer 6 of the high-temperature superconducting wire 13 and the metal substrate 4 but other than that. Since peeling occurs at the portion, it is possible to prevent the high temperature superconducting layer 6 from peeling off, and thus the possibility of deterioration of superconducting characteristics can be reduced.

ここで、特に高温超電導線材１３として実施例１ないし実施例３における高温超電導線材１０，１１，１２のいずれかを用いた場合には、本実施例にて述べた効果とともに上述の実施例１ないし実施例３での効果を得ることにより、高温超電導層６の引き剥がし力の発生可能性をより低減することができる。   Here, in particular, when any of the high-temperature superconducting wires 10, 11, and 12 in Examples 1 to 3 is used as the high-temperature superconducting wire 13, the above-described Examples 1 to 3 together with the effects described in this example are used. By obtaining the effect of the third embodiment, the possibility of generation of the peeling force of the high temperature superconducting layer 6 can be further reduced.

なお、本実施例においては、離形材テープ２１の表面にグリース（図示せず）を塗布することにより、離形の効果をさらに増大させ、超電導特性劣化の可能性をさらに低減させることができる。   In this embodiment, by applying grease (not shown) to the surface of the release material tape 21, the effect of release can be further increased, and the possibility of deterioration of superconducting characteristics can be further reduced. .

以上、本発明の好適な実施の形態として複数の実施例を説明してきたが、本発明は上述の各実施例の具体的構成に限定されるものではなく、発明の主旨を逸脱しない範囲で種々の変形を採ることができる。また、複数の実施例における技術的特徴を任意に組み合わせて高温超電導線材、高温超電導コイルを構成することも考えられる。   As described above, a plurality of examples have been described as preferred embodiments of the present invention. However, the present invention is not limited to the specific configurations of the above-described examples, and various modifications can be made without departing from the spirit of the invention. Can be adopted. It is also conceivable to construct a high-temperature superconducting wire and a high-temperature superconducting coil by arbitrarily combining technical features in a plurality of embodiments.

また、例えば、各実施例においてははんだ２による各層の接合を説明したが、これは接合の例示でありはんだ以外のものであってもよい。また、実施例２，３におけるスリットＳ，Ｓ’の形成は、マスキング以外の方法によって実現してもよい。   Further, for example, in each embodiment, the joining of each layer by the solder 2 has been described. However, this is an example of joining and may be other than solder. Further, the formation of the slits S and S ′ in the second and third embodiments may be realized by a method other than masking.

また、実施例１における２本の高温超電導線材部品の並列配置により構成した場合の部品分割数を３本、４本、…とすることや、実施例２，３における中間層、高温超電導層、保護金属層を左右に分割するスリットの数を２つ、３つ、…とすることで、各実施例における部品または層の分割数を増すことも考えられる。このように分割数を増加させれば、それだけ製作上の工程は増大するものの、高温超電導層６に加わる引き剥がし力を緩和するという効果もまた大きくなる。   Further, the number of component divisions when the two high-temperature superconducting wire parts in Example 1 are arranged in parallel is set to 3, 4,..., The intermediate layer in Examples 2 and 3, the high-temperature superconducting layer, It is also conceivable to increase the number of parts or layers in each embodiment by setting the number of slits that divide the protective metal layer to the left and right as two, three,. If the number of divisions is increased in this way, the manufacturing process increases accordingly, but the effect of relaxing the peeling force applied to the high temperature superconducting layer 6 is also increased.

（ａ）は本発明の実施例１にかかる高温超電導線材の断面図であり、（ｂ）は（ａ）の一部を抜き出して示した断面図である。(A) is sectional drawing of the high-temperature superconducting wire concerning Example 1 of this invention, (b) is sectional drawing which extracted and showed a part of (a). 本発明の実施例２にかかる高温超電導線材の断面図である。It is sectional drawing of the high-temperature superconducting wire concerning Example 2 of this invention. 本発明の実施例３にかかる高温超電導線材の断面図である。It is sectional drawing of the high temperature superconducting wire concerning Example 3 of this invention. （ａ）は本発明の実施例４にかかる高温超電導電流コイルの斜視図であり、（ｂ）は（ａ）の矢印ＶＢ方向から見た高温超電導コイル１ターンの断面図である。(A) is a perspective view of the high-temperature superconducting current coil according to Example 4 of the present invention, and (b) is a cross-sectional view of one turn of the high-temperature superconducting coil as viewed from the arrow VB direction of (a).

符号の説明Explanation of symbols

１Ａ，１Ｂ，８…高温超電導線材部品、２…はんだ、３，３Ａ，３Ｂ…安定化金属層、４…金属基板、５，５Ａ，５Ｂ…中間層、６，６Ａ，６Ｂ…高温超電導層、７Ａ，７Ｂ…保護金属層、１０，１１，１２，１３…高温超電導線材、１４…離形材テープ、１５Ａ，１５Ｂ…エポキシ樹脂、２０…高温超電導コイル。   1A, 1B, 8 ... high temperature superconducting wire parts, 2 ... solder, 3, 3A, 3B ... stabilizing metal layer, 4 ... metal substrate, 5, 5A, 5B ... intermediate layer, 6, 6A, 6B ... high temperature superconducting layer, 7A, 7B ... protective metal layer, 10, 11, 12, 13 ... high temperature superconducting wire, 14 ... release material tape, 15A, 15B ... epoxy resin, 20 ... high temperature superconducting coil.

Claims (8)

金属基板上に高温超電導材料からなる高温超電導層を含む複数の層を積層してなる高温超電導線材部品を複数有する高温超電導線材であって、
複数の高温超電導線材部品は並列に離間して設けられ、
この複数の高温超電導部品の上下にそれぞれ配置される安定化金属層と、
この２つの安定化金属層の間を前記複数の高温超電導線材部品の離間領域を含めて電気的に接合する接合部材と、
を有することを特徴とする高温超電導線材。 A high-temperature superconducting wire having a plurality of high-temperature superconducting wire parts formed by laminating a plurality of layers including a high-temperature superconducting layer made of a high-temperature superconducting material on a metal substrate,
A plurality of high-temperature superconducting wire parts are provided separately in parallel ,
Stabilizing metal layers respectively disposed above and below the plurality of high-temperature superconducting components;
A joining member that electrically joins between the two stabilizing metal layers including a separation region of the plurality of high-temperature superconducting wire parts;
A high-temperature superconducting wire characterized by comprising: 金属基板上に高温超電導材料からなる高温超電導層を含む複数の層を積層してなる高温超電導線材であって、
前記金属基板上の領域の一部であって前記高温超電導層が形成されないスリット領域と、
前記高温超電導層および前記スリット領域の上方に設けられる安定化金属層と、
この安定化金属層と前記高温超電導層の間を前記スリット領域を含めて電気的に接合する接合部材と、
を有することを特徴とする高温超電導部材。 A high-temperature superconducting wire comprising a plurality of layers including a high-temperature superconducting layer made of a high-temperature superconducting material on a metal substrate,
A slit region that is a part of the region on the metal substrate and on which the high-temperature superconducting layer is not formed
A stabilizing metal layer provided above the high temperature superconducting layer and the slit region;
A joining member that electrically joins between the stabilized metal layer and the high-temperature superconducting layer including the slit region;
A high-temperature superconducting member characterized by comprising: 金属基板上に高温超電導材料からなる高温超電導層を含む複数の層を積層してなる高温超電導線材であって、
前記金属基板上の領域の一部であって前記高温超電導層が形成されないスリット領域と、
前記高温超電導層および前記スリット領域の上方と、前記金属基板の下方にそれぞれ設けられる２つの安定化金属層と、
これら２つの安定化金属層と前記金属基板の間を前記スリット領域を含めて電気的に接合する接合部材と、
を有することを特徴とする高温超電導部材。 A high-temperature superconducting wire formed by laminating a plurality of layers including a high-temperature superconducting layer made of a high-temperature superconducting material on a metal substrate,
A slit region that is a part of the region on the metal substrate and on which the high-temperature superconducting layer is not formed,
Two stabilizing metal layers respectively provided above the high-temperature superconducting layer and the slit region and below the metal substrate;
A joining member that electrically joins between the two stabilizing metal layers and the metal substrate including the slit region;
A high-temperature superconducting member characterized by comprising: 前記高温超電導層と前記安定化金属層との間に前記高温超電導層に積層して形成され、銀または金を含む保護金属層を有することを特徴とする請求項１ないし請求項３のいずれか記載の高温超電導線材。   4. The protective metal layer according to claim 1, further comprising a protective metal layer formed by laminating the high temperature superconducting layer between the high temperature superconducting layer and the stabilizing metal layer and containing silver or gold. The high-temperature superconducting wire described. 請求項１ないし請求項４のいずれか記載の高温超電導線材を巻線して形成されることを特徴とする高温超電導コイル。   5. A high temperature superconducting coil formed by winding the high temperature superconducting wire according to any one of claims 1 to 4. 前記高温超電導線材と共巻きされる離形材テープと、
このテープと前記高温超電導線材との間に含浸により形成される樹脂層と、
を有し、前記離形材テープは前記樹脂層との接着力が相対的に弱い材料であることを特徴とする請求項５記載の高温超電導コイル。 A release material tape co-wound with the high temperature superconducting wire,
A resin layer formed by impregnation between the tape and the high-temperature superconducting wire;
Have a, the releasing material tape high-temperature superconducting coil according to claim 5, wherein the adhesion strength between the resin layer is a relatively weak material. 金属基板上に高温超電導材料からなる高温超電導層を含む複数の層を積層することで複数の高温超電導線材部品を製作する工程と、  Manufacturing a plurality of high-temperature superconducting wire parts by laminating a plurality of layers including a high-temperature superconducting layer made of a high-temperature superconducting material on a metal substrate;
この複数の高温超電導線材部品を離間して並列に配置する工程と、A step of separating and arranging the plurality of high-temperature superconducting wire parts in parallel;
この複数の高温超電導部品の上下に安定化金属層を配置する工程と、Arranging a stabilizing metal layer above and below the plurality of high-temperature superconducting components;
この２つの安定化金属層を前記複数の高温超電導線材部品の離間領域を含めて接合部材により電気的に接合する工程とElectrically joining the two stabilizing metal layers with a joining member including the spaced regions of the plurality of high-temperature superconducting wire components;
を有することを特徴とする高温超電導線材の製造方法。A method for producing a high-temperature superconducting wire characterized by comprising: 金属基板上に高温超電導材料からなる高温超電導層を含む複数の層を積層するとともに金属基板上の一部の領域を前記高温超電導層が存在しないスリット領域として形成する工程と、 Laminating a plurality of layers including a high-temperature superconducting layer made of a high-temperature superconducting material on a metal substrate and forming a part of the region on the metal substrate as a slit region where the high-temperature superconducting layer does not exist;
前記高温超電導層および前記スリット領域の少なくとも上方に安定化金属層を配置する工程と、Disposing a stabilizing metal layer at least above the high temperature superconducting layer and the slit region;
この安定化金属層と前記高温超電導層の間を前記スリット領域を含めて接合部材により電気的に接合する工程とElectrically bonding the stabilizing metal layer and the high-temperature superconducting layer by a bonding member including the slit region;
を有することを特徴とする高温超電導部材の製造方法。The manufacturing method of the high-temperature superconducting member characterized by having.
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