JPH01296510A - Superconducting conductor - Google Patents
Superconducting conductorInfo
- Publication number
- JPH01296510A JPH01296510A JP63126878A JP12687888A JPH01296510A JP H01296510 A JPH01296510 A JP H01296510A JP 63126878 A JP63126878 A JP 63126878A JP 12687888 A JP12687888 A JP 12687888A JP H01296510 A JPH01296510 A JP H01296510A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- pipe
- thin membrane
- thin film
- outstanding
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims abstract description 9
- 239000010409 thin film Substances 0.000 claims description 28
- 239000010408 film Substances 0.000 claims description 8
- 239000010949 copper Substances 0.000 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 abstract 7
- 239000002826 coolant Substances 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は超伝導薄膜を用いた超伝導線に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a superconducting wire using a superconducting thin film.
従来の超伝導線はバルク超伝導材料を用いることを製造
上の出発点としている。例えば、酸化物からなる超伝導
セラミックスを用いる例では、まずプレス成型、焼結な
どを経て得たバルク状の超伝導材料を用意し、これを粉
砕して微粉末とする。The manufacturing starting point for conventional superconducting wires is the use of bulk superconducting materials. For example, in the case of using superconducting ceramics made of oxides, a bulk superconducting material obtained through press molding, sintering, etc. is first prepared, and then pulverized to form a fine powder.
次に、銅などで作成されたパイプを用意し、このパイプ
中に超伝導材料からなる微粉末を入れ、圧延などによっ
て線材化している。Next, a pipe made of copper or the like is prepared, fine powder of a superconducting material is put into the pipe, and it is turned into a wire by rolling or other means.
ここで、いわゆる超伝導材料を用いて超伝導線を実現す
るためには、これを一定温度以下に保たなければならな
い。すなわち、古くから知られるニオブ系のものでは液
体ヘリウム等で冷却することが必要になり、近年の酸化
物超伝導材料などにおいても液体窒素等で冷却すること
が必要になる。Here, in order to realize a superconducting wire using a so-called superconducting material, it must be kept at a certain temperature or lower. That is, niobium-based materials that have been known for a long time require cooling with liquid helium or the like, and recent oxide superconducting materials also require cooling with liquid nitrogen or the like.
そこで、冷却機能を有した超伝導線として、例えば第３
図に示すようなホロウコンダクタ（ｈｏｌ ｌｏｗｃｏ
ｎｄｕｃｔｏｒ ）と呼ばれるものがある。これは、安
定化銅などで作成されたバイブ１中に超伝導材料２がシ
ート状に埋め込まれ、このパイプ１中の空胴３に液体ヘ
リウムなとを流通できるようになっている。Therefore, as a superconducting wire with a cooling function, for example,
A hollow conductor (hol lowco) as shown in the figure
There is something called a conductor. A superconducting material 2 is embedded in a sheet shape in a vibrator 1 made of stabilized copper or the like, and liquid helium or the like can be passed through a cavity 3 in this pipe 1.
しかしながら、第３図のような従来構造の超伝導線で高
い臨界電流密度を実現することは容易ではない。なぜな
ら、近年の高温超伝導材料はその結晶構造のため、電気
的特性のうちの特に臨界電流密度の異方性が極めて大き
く、大電流を流すときにはその配向性が問題となるから
である。従来技術のように、バルク超伝導材料を製造上
の出発点にすると、この超伝導材料の配向性を超伝導線
において一定方向に揃えることはほとんど不可能である
。そこで、薄膜形成技術を用いることで配向性を良好に
し、臨界電流密度を高くすることが着目されているが、
超伝導線に関しては未だ有効な手法は見出されていない
。However, it is not easy to realize a high critical current density with a superconducting wire having a conventional structure as shown in FIG. This is because recent high-temperature superconducting materials have very large anisotropy in their electrical properties, especially in critical current density, due to their crystal structures, and their orientation poses a problem when passing large currents. If a bulk superconducting material is used as the starting point for manufacturing as in the prior art, it is almost impossible to align the orientation of this superconducting material in a fixed direction in a superconducting wire. Therefore, attention is being focused on improving the orientation and increasing the critical current density by using thin film formation technology.
No effective method has yet been found for superconducting wires.
そこで本発明は、上記の薄膜形成技術によれば配向性を
良好にしうろことに着目し、大電流を通じることが可能
な冷却機能を有する超伝導線を提供することを目的とす
る。Therefore, the present invention focuses on the fact that the above-mentioned thin film forming technique can improve the orientation, and aims to provide a superconducting wire having a cooling function that can pass a large current.
本発明の超伝導線は、内部に寒剤を流通させうるように
中空状に熱伝導性の良好な材料によって形成されたパイ
プと、このパイプの外面もしくは内面に形成された超伝
導材料からなる超伝導薄膜とを備えることを特徴とする
。The superconducting wire of the present invention consists of a hollow pipe made of a material with good thermal conductivity so that a cryogen can flow therein, and a superconducting material made of a superconducting material formed on the outside or inside of this pipe. A conductive thin film.
本発明の構成によれば、超伝導を呈する部分は臨界電流
密度の高い超伝導薄膜で形成され、しかもこれはバイブ
中の寒剤によって効果的に冷却されるので、大電流を通
じることが可能になる。また、この超伝導薄膜を保護膜
で被覆すれば、経時的な安定性を高くすることができる
。さらに、パイプを電気的伝導性を有する材料（特に低
抵抗の材料）で形成すれば、超伝導薄膜の超伝導状態が
破れたときにも、このパイプを電流のバイパスとして機
能させることができる。According to the structure of the present invention, the part exhibiting superconductivity is formed of a superconducting thin film with a high critical current density, and since this is effectively cooled by the cryogen in the vibrator, it is possible to conduct a large current. Become. Further, by covering this superconducting thin film with a protective film, stability over time can be increased. Furthermore, if the pipe is made of an electrically conductive material (particularly a low-resistance material), the pipe can function as a current bypass even when the superconducting state of the superconducting thin film is broken.
以下、添付図面の第１図および第２図にもとづいて、本
発明の詳細な説明する。なお、図面の説明において同一
要素には同一符号を付し、重複する説明を省略する。Hereinafter, the present invention will be described in detail based on FIGS. 1 and 2 of the accompanying drawings. In addition, in the description of the drawings, the same elements are given the same reference numerals, and redundant description will be omitted.
第１図は本発明の第１実施例の斜視図である。FIG. 1 is a perspective view of a first embodiment of the invention.
超伝導線１０は安定化銅などからなる円筒状のパイプ１
１を有し、このパイプ１１の外面には各種のコーティン
グ技術により、超伝導薄膜１２が形成されている。ここ
で、超伝導薄膜１２の材料としてはペロブスカイトの変
形層状構造を有するＹ Ｂａ Ｃｕ Ｏのほか、
各種のものを用１ ２ ３７−δ
いることができる。そして、この超伝導薄膜１２はパイ
プ１１の軸方向に臨界電流密度Ｊ が最も高くなるよう
に配向させられている。すなわち、臨界電流密度Ｊ の
大きい結晶方位で優先的に配向させられている。超伝導
薄膜１２の表面には、これを保護するための保護膜１３
がコーティングされている。これは、超伝導薄膜１２が
、Ｌ ｎ ＩＢ ａ ２ Ｃｕ ３０ ｖ−δ（Ｌ ｎ
二ランタニド系元素）の場合は空気中の水分などで
変質しゃすく、また機械的損傷も受けやすいので、これ
らから効果的に保護するためである。したがって、超伝
導薄膜１２に対して安定な性質を有するものであれば、
ガラス、有機材料、貴金属など各種のものを用いること
ができる。The superconducting wire 10 is a cylindrical pipe 1 made of stabilized copper or the like.
1, and a superconducting thin film 12 is formed on the outer surface of the pipe 11 using various coating techniques. Here, as the material of the superconducting thin film 12, in addition to YBaCuO having a perovskite deformed layered structure,
Various types of 1 2 37-δ can be used. This superconducting thin film 12 is oriented in the axial direction of the pipe 11 so that the critical current density J 2 is highest. That is, it is preferentially oriented in a crystal orientation with a large critical current density J. A protective film 13 is provided on the surface of the superconducting thin film 12 to protect it.
is coated. This means that the superconducting thin film 12 is L n IBa 2 Cu 30 v-δ (L n
In the case of dilanthanide elements), they are susceptible to deterioration due to moisture in the air and are also susceptible to mechanical damage, so this is to effectively protect them from these. Therefore, if it has stable properties for the superconducting thin film 12,
Various materials such as glass, organic materials, and precious metals can be used.
次に、上記実施例に係る超伝導線の作用を簡単に説明す
る。Next, the function of the superconducting wire according to the above embodiment will be briefly explained.
超伝導線として使用する際には、パイプ１１の空胴１４
中に矢印Ａの如く寒剤を適宜の手段で流す。この寒剤と
しては、例えば液体窒素を用いることができる。する゛
と、熱伝導性の良好なパイプ１１を介して超伝導薄膜１
２は臨界温度Ｔ 以下に冷却され、超伝導現象を呈する
ことになる。このとき、超伝導薄膜１２は配向性を有し
ているので臨界電流密度Ｊ が大きく、従っぞ大電流を
通すことができる。When used as a superconducting wire, the cavity 14 of the pipe 11
Pour the cryogen inside as shown by arrow A using an appropriate means. As this cryogen, for example, liquid nitrogen can be used. Then, the superconducting thin film 1 is passed through the pipe 11 with good thermal conductivity.
2 is cooled below the critical temperature T and exhibits a superconducting phenomenon. At this time, since the superconducting thin film 12 has orientation, the critical current density J 2 is large, and therefore a large current can be passed through it.
次に、第２図を参照して本発明の第２実施例を説明する
。Next, a second embodiment of the present invention will be described with reference to FIG.
第２図はその斜視図である。この実施例の超伝導線１０
では、パイプ１１は矩形状に形成され、その長辺側の内
面にのみ超伝導薄膜１２が形成され、その上にのみ保護
膜１３がコーティングされている。そして、パイプ１１
の外側は断熱材１５によって囲まれている。FIG. 2 is a perspective view thereof. Superconducting wire 10 of this example
In this case, the pipe 11 is formed into a rectangular shape, and the superconducting thin film 12 is formed only on the inner surface of the long side, and the protective film 13 is coated only on the superconducting thin film 12. And pipe 11
The outside is surrounded by a heat insulating material 15.
この実施例においても、空胴１４中に寒剤を流通させて
使用する。このようにすると、超伝導薄膜１２は保護膜
１３を介して寒剤により冷却されるだけでなく、短辺側
のパイプ１１が寒剤により冷却されることにより、熱伝
導性の良好なパイプ１１を介して超伝導薄膜１２は保護
膜１３の反対側からも冷却される。しかも、熱伝導性の
良好なパイプ１１は断熱材１５に囲まれているので、雰
囲気によりパイプ１１、超伝導薄膜１２の温度か上昇す
ることも少ない。In this embodiment as well, a cryogen is used to flow through the cavity 14. In this way, the superconducting thin film 12 is not only cooled by the cryogen through the protective film 13, but also the pipe 11 on the short side is cooled by the cryogen, so that the superconducting thin film 12 is cooled by the cryogen through the pipe 11 having good thermal conductivity. The superconducting thin film 12 is also cooled from the opposite side of the protective film 13. Moreover, since the pipe 11 having good thermal conductivity is surrounded by the heat insulating material 15, the temperature of the pipe 11 and the superconducting thin film 12 is unlikely to rise due to the atmosphere.
本発明は上記実施例に限定されず、種々の変形が可能で
ある。The present invention is not limited to the above embodiments, and various modifications are possible.
例えば、パイプの断面形状などは実施例のものに限られ
ず、また実施例のような超伝導線を２本以上組み合せて
１本の超伝導線として用いてもよい。For example, the cross-sectional shape of the pipe is not limited to that in the example, and two or more superconducting wires as in the example may be combined to form a single superconducting wire.
以上、詳細に説明した通り本発明によれば、超伝導を呈
する部分は臨界電流密度の高い超伝導薄膜で形成され、
しかもこれはパイプ中の寒剤によって効果的に冷却され
るので、大電流を通じることが可能になる。また、パイ
プを電気的伝導性を有する材料（特に低抵抗の材料）で
形成すれば、超伝導薄膜の超伝導状態が破れたときにも
、このパイプを電流のバイパスとして機能させることが
できるので、線材としての信頼性を高くすることができ
る。更に、超伝導薄膜を保護膜で被覆すれば、超伝導薄
膜を長期にわたって安定に保つことができるので、実用
性、汎用性を著しく高めることが可能になる。As explained in detail above, according to the present invention, the portion exhibiting superconductivity is formed of a superconducting thin film with a high critical current density,
Moreover, it is effectively cooled by the cryogen in the pipe, allowing large currents to pass through it. Additionally, if the pipe is made of an electrically conductive material (particularly a low-resistance material), the pipe can function as a current bypass even when the superconducting state of the superconducting thin film is broken. , reliability as a wire can be increased. Furthermore, if the superconducting thin film is coated with a protective film, the superconducting thin film can be kept stable for a long period of time, making it possible to significantly improve its practicality and versatility.
第１図は、本発明の超伝導線の第１実施例の斜視図、第
２図は、本発明の超伝導線の第２実施例の斜視図、第３
図は、従来の超伝導線の斜視図である。
１０・・・超伝導線、１１・・・パイプ、１２・・・超
伝導薄膜、１３・・・保護膜、１４・・・空胴、１５・
・・断熱材。
特許出願人 浜松ホトニクス株式会社代理人弁理士
長谷用 芳 樹第２実施イ列の超伝導横
第２図
税来の超伝導咬
第３図FIG. 1 is a perspective view of a first embodiment of the superconducting wire of the present invention, FIG. 2 is a perspective view of the second embodiment of the superconducting wire of the present invention, and FIG.
The figure is a perspective view of a conventional superconducting wire. DESCRIPTION OF SYMBOLS 10... Superconducting wire, 11... Pipe, 12... Superconducting thin film, 13... Protective film, 14... Cavity, 15...
・Insulation material. Patent applicant Hamamatsu Photonics Co., Ltd. Representative Patent Attorney
Yoshiki Hase's 2nd implementation row of superconducting horizontal diagram 2 Taxi's superconducting bar diagram 3
Claims (1)
の良好な材料によって形成されたパイプと、このパイプ
の外面もしくは内面に形成された超伝導材料からなる超
伝導薄膜とを備えることを特徴とする超伝導線。 ２、前記超伝導薄膜の表面には保護膜が形成されている
ことを特徴とする請求項１記載の超伝導線。 ３、前記パイプは電気伝導性を有する材料で形成されて
いることを特徴とする請求項１記載の超伝導線。[Claims] 1. A hollow pipe made of a material with good thermal conductivity so that a cryogen can flow therein, and a superconducting material made of a superconducting material formed on the outer or inner surface of this pipe. A superconducting wire comprising a conductive thin film. 2. The superconducting wire according to claim 1, wherein a protective film is formed on the surface of the superconducting thin film. 3. The superconducting wire according to claim 1, wherein the pipe is made of an electrically conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63126878A JPH0654609B2 (en) | 1988-05-24 | 1988-05-24 | Hollow superconducting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63126878A JPH0654609B2 (en) | 1988-05-24 | 1988-05-24 | Hollow superconducting wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01296510A true JPH01296510A (en) | 1989-11-29 |
| JPH0654609B2 JPH0654609B2 (en) | 1994-07-20 |
Family
ID=14946083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63126878A Expired - Fee Related JPH0654609B2 (en) | 1988-05-24 | 1988-05-24 | Hollow superconducting wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0654609B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0227619A (en) * | 1988-07-12 | 1990-01-30 | Internatl Business Mach Corp <Ibm> | Manufacture of composite superconducting copper wire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63276811A (en) * | 1987-05-08 | 1988-11-15 | Hitachi Ltd | Superconductor |
| JPS647415A (en) * | 1987-06-30 | 1989-01-11 | Toshiba Corp | Superconductive wire of oxide type and its manufacture |
| JPH01134811A (en) * | 1987-11-20 | 1989-05-26 | Fujikura Ltd | Extremely low temperature cable |
-
1988
- 1988-05-24 JP JP63126878A patent/JPH0654609B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63276811A (en) * | 1987-05-08 | 1988-11-15 | Hitachi Ltd | Superconductor |
| JPS647415A (en) * | 1987-06-30 | 1989-01-11 | Toshiba Corp | Superconductive wire of oxide type and its manufacture |
| JPH01134811A (en) * | 1987-11-20 | 1989-05-26 | Fujikura Ltd | Extremely low temperature cable |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0227619A (en) * | 1988-07-12 | 1990-01-30 | Internatl Business Mach Corp <Ibm> | Manufacture of composite superconducting copper wire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0654609B2 (en) | 1994-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2015504573A (en) | Superconducting recovery method by joining 2nd generation ReBCO high temperature superconductor using partial fine melt diffusion welding by direct contact of high temperature superconductor layer and annealing with oxygen supply annealing | |
| JPH11144938A (en) | Current lead device and refrigerator-cooled superconducting magnet | |
| JP2002525790A (en) | Protected superconducting component and its manufacturing method | |
| JPH01296510A (en) | Superconducting conductor | |
| JPH03156809A (en) | How to use oxide superconducting conductors | |
| US4234861A (en) | Electrical windings | |
| JPH1186923A (en) | Connection device and superconducting magnet | |
| US5248851A (en) | Pseudo-rod fabricated from discrete planar conductors | |
| JPH0677542A (en) | Superconducting switch | |
| JPH0249367A (en) | Jointed construction of ceramic superconductor and ordinary conductor | |
| JPH0272685A (en) | Method for forming weakly coupled superconductor part | |
| JP2898713B2 (en) | Current lead | |
| JP3363164B2 (en) | Superconducting conductor | |
| JPS63299012A (en) | Superconductive fiber and its manufacture | |
| JP2560088B2 (en) | How to join superconductors | |
| JP2829201B2 (en) | Superconducting element | |
| JPH10247428A (en) | Oxide superconducting wire | |
| JP4092393B2 (en) | High temperature superconducting Josephson junction forming method and high temperature superconducting Josephson device comprising Josephson junction formed thereby | |
| JP2599500B2 (en) | Superconducting element and fabrication method | |
| JPH0817621A (en) | Superconducting current lead | |
| JPS6226889Y2 (en) | ||
| JP2691065B2 (en) | Superconducting element and fabrication method | |
| JPS63234574A (en) | Superconducting element | |
| JPH01296573A (en) | Connecting structure for ceramic superconductor with normal conductor | |
| JPH0888117A (en) | Current lead for refrigerator-cooled superconducting coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |