JPH0817127B2 - Oxide superconducting coil - Google Patents
Oxide superconducting coilInfo
- Publication number
- JPH0817127B2 JPH0817127B2 JP5026713A JP2671393A JPH0817127B2 JP H0817127 B2 JPH0817127 B2 JP H0817127B2 JP 5026713 A JP5026713 A JP 5026713A JP 2671393 A JP2671393 A JP 2671393A JP H0817127 B2 JPH0817127 B2 JP H0817127B2
- Authority
- JP
- Japan
- Prior art keywords
- oxide
- coil
- superconducting
- superconducting coil
- superconductor
- 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.)
- Expired - Fee Related
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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
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- Superconductors And Manufacturing Methods Therefor (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、支持基板上に酸化物系
超電導体層を有する酸化物系超電導コイルに係わり、特
に強磁場を発生させるに好適なヘリコイド面を有する酸
化物系超電導コイルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxide superconducting coil having an oxide superconducting layer on a supporting substrate, and particularly to an oxide having a helicoid surface suitable for generating a strong magnetic field. System superconducting coil.
【０００２】[0002]
【従来の技術】１９８６年、高い臨界温度を持つＬａ−
Ｂａ−Ｃｕ−Ｏペロブスカイト系構造の超電導体（特開
昭６３−２６０８５３号公報）が、さらに翌年Ｙ−Ｂａ
−Ｃｕ−Ｏ系（Ｍ．Ｋ．Ｗｕ，Ｊ．Ｒ．Ａshburn，Ｃ．
Ｊ．Ｔorng，Ｙ．Ｑ．Ｗand and Ｃ．Ｗ．Ｃhu：Ｐhy
s．Ｒev．Ｌett．,５８（１９８７）９０８）の液体窒
素を冷媒とする９０Ｋ級の超電導体が発見された。2. Description of the Related Art La-having a high critical temperature in 1986
A superconductor having a Ba—Cu—O perovskite structure (Japanese Patent Laid-Open No. 63-260853) was further developed in the next year by Y-Ba.
-Cu-O system (M.K.Wu, JR Ashburn, C.I.
J. Torng, Y. Q. Wand and C. W. Chu: Phy
s. Rev. Lett. , 58 (1987) 908) , a 90K-class superconductor using liquid nitrogen as a refrigerant was discovered.
【０００３】さらに臨界温度の高いＢｉ−Ｓｒ−Ｃａ−
Ｃｕ−Ｏ系（Ｔｃ：１１０Ｋ，Ｈ．Ｍaeda，Ｙ．Ｔanak
a，Ｍ．Ｆukutomi and Ｔ．Ａsano：Ｊpn．Ｊ．Ａppl．
Ｐhys．２７（１９８８）Ｌ２０９），Ｔｌ−Ｂａ−Ｃ
ａ−Ｃｕ−Ｏ系（Ｔｃ：１２０Ｋ，Ｚ．Ｚ．Ｓheng and
Ａ．Ｍ．Ｈermann：Ｎature ３２２（１９８８）５
５）が発見され、超電導体の研究成果には目覚ましいも
のがあった。Bi-Sr-Ca- having a higher critical temperature
Cu-O system (Tc: 110K, H. Maeda, Y. Tanak
a, M. Fukutomi and T.F. Asano: Jpn. J. Appl.
Phys. 27 (1988) L209), Tl-Ba-C.
a-Cu-O system (Tc: 120K, ZZ Sheng and
A. M. Hermann: Nature 322 (1988) 5
5) was discovered, and the research results of superconductors were remarkable.
【０００４】こうした新材料の発見とともに、高温超電
導体を超電導コイル等に応用するための線材の開発も進
められた。その中で、これらの高温超電導体を線材に加
工する方法として、単なる線引き或いは押し出し等の加
工方法では高臨界電流密度（Ｊｃ）線材が得られないこ
とが分かってきた。高Ｊｃ線材を実現する方法として、
圧延あるいはプレス等を行うことにより、単尺線で高い
Ｊｃを有する線材が得られることが知られている。Along with the discovery of such new materials, the development of wire rods for applying high-temperature superconductors to superconducting coils and the like was also promoted. Among them, it has been found that a high critical current density (Jc) wire cannot be obtained by a processing method such as simple drawing or extrusion as a method of processing these high-temperature superconductors into a wire. As a method to realize high Jc wire,
It is known that a wire having a high Jc can be obtained with a single-sized wire by rolling or pressing.
【０００５】金属シース線材にこの手法を用いるとシー
ス断面が偏平となるので、ソレノイド状に線材を卷く方
法に対してパンケーキ状に作製する方法が用いられてい
る。また、これらのコイル作製方法以外にヘリコイド面
を有する酸化物系超電導コイル構造なども提案されてい
る。When this method is used for a metal sheath wire rod, the sheath cross section becomes flat. Therefore, a method of making a wire rod in a pancake shape is used instead of a method of winding the wire rod in a solenoid shape. In addition to these coil manufacturing methods, oxide superconducting coil structures having a helicoid surface have also been proposed.
【０００６】[0006]
【発明が解決しようとする課題】上記のヘリコイド面を
有する酸化物系超電導コイルは、ヘリコイド面の面積が
大きいので大電流を流すことができると云う利点があ
る。しかし、その反面コイル内側と外側との間で不均一
な磁場が発生し、強い磁場のかかるコイル内側で超電導
体がクエンチしてしまうために大きな磁場を発生する酸
化物系超電導コイルとして問題があることが分かった。
このようなヘリコイド面を有する酸化物系超電導コイル
の実用化に当っては、該コイル内側と外側の磁場の不均
一性の解決が必要である。The oxide-based superconducting coil having the above-mentioned helicoid surface has an advantage that a large current can flow because the area of the helicoid surface is large. However, on the other hand, a non-uniform magnetic field is generated between the inside and outside of the coil, and the superconductor is quenched inside the coil where a strong magnetic field is applied, so there is a problem as an oxide superconducting coil that generates a large magnetic field. I found out.
In order to put the oxide superconducting coil having such a helicoid surface into practical use, it is necessary to solve the nonuniformity of the magnetic field inside and outside the coil.
【０００７】本発明の目的は、上記に鑑み、特に、臨界
温度が高く磁場中での臨界電流密度の高い超電導体を提
供することにある。In view of the above, an object of the present invention is to provide a superconductor having a high critical temperature and a high critical current density in a magnetic field.
【０００８】[0008]
【課題を解決するための手段】本発明者ら前記課題を解
決するためにいろいろな角度から検討を重ね、本発明に
至った。本発明の要旨は次のとおりである。Means for Solving the Problems The inventors of the present invention have conducted various studies from various angles in order to solve the above problems, and have reached the present invention. The gist of the present invention is as follows.
【０００９】少なくとも表面層が電気絶縁性である支持
基板と、該支持基板上に酸化物系超電導体層が形成され
たヘリコイド面を有するディスク状の超電導コイルであ
って、前記酸化物系超電導体層の厚さがコイルの中央部
から端部に向かって減少するように形成されていること
を特徴とする酸化物系超電導コイル。[0009] and the support substrate surface layer is an electrically insulating the at no small, oxide superconductor layer on the support substrate is formed
A disk-shaped superconducting coil having a helicoid surface , wherein the thickness of the oxide-based superconducting layer is a central part of the coil .
The oxide-based superconducting coil is formed so as to decrease from the end to the end .
【００１０】前記酸化物系超電導体層の厚さがコイルの
中央部から端部に向かって減少するように形成すること
により、その断面を微少な部分に分割したときにその微
少部分の断面積（△Ｓ）と、その臨界電流密度（△Ｊ
c）との積（△Ｊc×△Ｓ）は、超電導体層の微少な部分
の断面内の電流値△Ｉcとなる。従って、電流値Ｉcの断
面内の分布を一定にすることにより発生磁場の均一度を
向上することができる。これにより発生磁場の不均一に
基づくコイルのクエンチを防ぐことができる。 The thickness of the oxide-based superconductor layer is
Form so that it decreases from the center to the edges
When the cross section is divided into minute parts,
The cross-sectional area (ΔS) of a small part and its critical current density (ΔJ
The product of (c) and (ΔJc × ΔS) is the minute part of the superconductor layer.
The current value ΔIc in the cross section becomes. Therefore, disconnection of the current value Ic
The uniformity of the generated magnetic field can be improved by keeping the in-plane distribution constant.
Can be improved. This makes the generated magnetic field non-uniform
Quenching of the based coil can be prevented.
【００１１】図１は本発明の超電導コイルの模式断面図
である。超電導コイルの内側の厚さがコイル外側の厚さ
に比べ厚くなっている。このコイル構造においては、コ
イル内側と外側の磁場の不均一性に基づくコイル内側で
の超電導体のクエンチを防ぐことができ、実用的な高磁
場の発生に極めて優れている。FIG. 1 is a schematic sectional view of a superconducting coil of the present invention. The inner thickness of the superconducting coil is thicker than the outer thickness of the coil. In this coil structure, quenching of the superconductor inside the coil due to inhomogeneity of the magnetic field inside and outside the coil can be prevented, and it is extremely excellent in generating a practical high magnetic field.
【００１２】酸化物系超電導体を支持する基板として
は、銀，金，ニッケル基合金（ハステロイ：米国 Ｈay
nes Ｓtelite Ｃｏ．の商品名）またはセラミックスあ
るいは可撓性のイットリア安定化ジルコニア（ＹＳＺ）
を用いることができる。場合によっては、これらの基板
に超電導体との反応を防ぐため、あるいは基板と酸化物
系超電導体との熱膨張差を緩和するためにバッファ層を
形成することができる。Substrates for supporting oxide-based superconductors include silver, gold and nickel based alloys (Hastelloy: USA Hay
nes Stelite Co. Brand name) or ceramics or flexible yttria-stabilized zirconia (YSZ)
Can be used. In some cases, a buffer layer can be formed on these substrates in order to prevent reaction with the superconductor or to reduce the difference in thermal expansion between the substrate and the oxide-based superconductor.
【００１３】酸化物系超電導体としては、（Ｙ、Ｂａ、
Ｃｕ、Ｏ）、（Ｂｉ、Ｓｒ、Ｃａ、Ｃｕ、Ｏ）、（Ｔ
ｌ、Ｂａ、Ｃａ、Ｃｕ、Ｏ）あるいは（Ｔｌ、Ｐｂ、Ｓ
ｒ、Ｃａ、Ｃｕ）を主な構成元素として、Ｌａ、Ｎｄ等
を含む酸化物系超電導体が用いられる。As the oxide-based superconductor, (Y, Ba,
Cu, O), (Bi, Sr, Ca, Cu, O), (T
l, Ba, Ca, Cu, O) or (Tl, Pb, S
An oxide superconductor containing La, Nd, etc. as a main constituent element is used.
【００１４】前記酸化物系超電導体は、原料組成である
前記各成分が均質に混合されていればその混合方法には
特に制限はなく、例えば、原料物質を直接粉砕，混合す
ることができる。上記の混合粉末は、そのまゝあるいは
ペレット状に成形し、５００℃以上で焼成することによ
って合成できる。その際、より高い超電導特性を得るた
め、原料組成に応じて酸素、空気、アルゴン、窒素等の
雰囲気が選ばれる。The oxide superconductor is not particularly limited in its mixing method as long as each of the components constituting the raw material composition is homogeneously mixed. For example, the raw material can be directly pulverized and mixed. The above-mentioned mixed powder can be synthesized by molding it as it is or in the form of pellets and firing it at 500 ° C. or higher. At that time, in order to obtain higher superconducting properties, an atmosphere of oxygen, air, argon, nitrogen or the like is selected according to the composition of the raw material.
【００１５】また、このような焼成体を再粉砕，再混合
を繰り返すことにより、均質で体積率が高く、超電導特
性の優れた超電導体を得ることができる。なお、このよ
うにして作製された粉末は超電導膜に形成して用いるこ
ともできる。Further, by repeatedly pulverizing and remixing such a fired body, it is possible to obtain a superconductor which is homogeneous, has a high volume ratio, and has excellent superconducting properties. The powder produced in this way can also be used after being formed into a superconducting film.
【００１６】酸化物系超電導体または超電導厚膜は、支
持基板の片面または両面に形成する、あるいはシース内
に含める等の目的に応じて形成することができる。The oxide-based superconductor or the superconducting thick film can be formed on one side or both sides of the supporting substrate, or can be formed depending on the purpose such as inclusion in the sheath.
【００１７】上記支持基板上に形成する方法としては、
原料粉末のスラリーを用いドクターブレードによる塗
布、ディップ塗布、あるいは原料粉末をプラズマ溶射す
る等、公知の厚膜成膜法を用い、支持基板上に厚さ１０
μｍ以上の厚膜を形成してヘリコイド面を有するデイス
ク状単層コイルとする。その際、図２に示すように、単
層コイル３は、そのコイル端部の表面に少なくとも０.
５ｍｍは超電導体層を形成せず、単層コイルの支持基板
２に露出部４を形成する。さらに、厚膜形成法によりコ
イル内側の厚さが外側のそれに比べ厚くなるよう被覆す
る。その際の厚膜形成法は最初に形成した厚膜の形成法
と同じでも異なっていてもよい。As a method for forming on the supporting substrate,
A known thick film forming method such as coating with a doctor blade using a slurry of raw material powder, dip coating, or plasma spraying of the raw material powder is used to form a film having a thickness of 10
A thick film of μm or more is formed to obtain a disk-shaped single layer coil having a helicoid surface. At this time, as shown in FIG. 2, the single-layer coil 3 has at least 0.1 on the surface of the coil end portion.
In the case of 5 mm, the superconductor layer is not formed, and the exposed portion 4 is formed on the supporting substrate 2 of the single layer coil. Further, a thick film forming method is used to cover the coil so that the inner thickness of the coil is thicker than that of the outer side. The thick film forming method at that time may be the same as or different from the method of forming the thick film formed first.
【００１８】強磁場を必要とする超電導コイルは、上記
単層コイル３を複数積層して用いる。その際は、単層コ
イル３の基板表面の露出部４を合わせて積層し、各単層
コイルを接続する。For the superconducting coil which requires a strong magnetic field, a plurality of the single layer coils 3 are laminated and used. In that case, the exposed portions 4 on the substrate surface of the single-layer coils 3 are laminated together and the respective single-layer coils are connected.
【００１９】上記超電導コイルは、高性能な超電導応用
装置およびシステムを実用化することができ、特に、強
磁場を必要とするＭＲＩ、ＮＭＲ等の医療用機器や理化
学用機器に用いることができる。The above-mentioned superconducting coil can be put to practical use as a high-performance superconducting application device and system, and can be used particularly in medical instruments such as MRI and NMR and physicochemical instruments which require a strong magnetic field.
【００２０】[0020]
【作用】本発明のヘリコイド面を有したデイスク状コイ
ルの酸化物系超電導体層の厚さがコイルの中央部から端
部に向かって減少するように形成されているために、磁
場の不均一性によるコイルのクエンチを防ぐことができ
る。[Action] end from the central portion thickness of the oxide superconductor layer of the disk-shaped coil having an f Rikoido surface of the coil of the present invention
Since it is formed so as to decrease toward the portion, quenching of the coil due to inhomogeneity of the magnetic field can be prevented.
【００２１】[0021]
【実施例】本発明を実施例により具体的に説明する。EXAMPLES The present invention will be specifically described with reference to examples.
【００２２】〔実施例１〕酸化物系超電導体原料とし
て、Ｂｉ2Ｏ3，ＳｒＣＯ3，ＣａＣＯ3，ＣｕＯのそれぞ
れのモル比がＢｉ：Ｓｒ：Ｃａ：Ｃｕ＝２.４：２.０：
１.０：２.０になるよう配合し、これをメノウ製乳鉢を
備えたライカイ機により約２０分混合粉砕した。Example 1 As an oxide superconductor raw material, the molar ratio of Bi 2 O 3 , SrCO 3 , CaCO 3 , and CuO was Bi: Sr: Ca: Cu = 2.4: 2.0:
It was blended so as to be 1.0: 2.0, and this was mixed and pulverized for about 20 minutes by a raikai machine equipped with an agate mortar.
【００２３】次に、上記粉末を磁性アルミナルツボにと
り、大気中で８５０℃、２０時間焼成した。ふるいによ
り粒度調整を行い酸化物系超電導体の溶射粉末を得た。Next, the above powder was placed in a magnetic alumina crucible and fired in the atmosphere at 850 ° C. for 20 hours. The particle size was adjusted with a sieve to obtain thermal spray powder of oxide superconductor.
【００２４】内径２０ｍｍ×外径５０ｍｍのヘリコイド
面を有したデイスク型Ａｇ基板の中心より図２に示すよ
うに２ｍｍ幅の切込み部５を径方向に入れ、その切込み
部の両サイド１ｍｍをマスクする。この基板上に前記溶
射粉末を用いて、大気中プラズマ溶射装置で図１で示す
ような断面形状の溶射膜を成膜した。基板の内径側の膜
厚：１５０μｍ、外径側の膜厚：１００μｍとなるよう
基板面に対して傾斜を有する溶射膜を形成した。なお、
溶射条件は、出力：５０ｋＷ、プラズマ電流：８００
Ａ、溶射時間：２００分で、プラズマガスにはＡｒ、２
次ガスにはＨ2を用いた。As shown in FIG. 2, a notch 5 having a width of 2 mm is made in the radial direction from the center of a disk type Ag substrate having a helicoid surface having an inner diameter of 20 mm and an outer diameter of 50 mm, and 1 mm on both sides of the notch is masked. . A thermal spray coating having a cross-sectional shape as shown in FIG. 1 was formed on this substrate by using the above thermal spray powder with an atmospheric plasma spray apparatus. A sprayed film having an inclination with respect to the substrate surface was formed so that the film thickness on the inner diameter side of the substrate was 150 μm and the film thickness on the outer diameter side was 100 μm. In addition,
Thermal spraying conditions are: output: 50 kW, plasma current: 800
A, spraying time: 200 minutes, plasma gas is Ar, 2
H 2 was used as the next gas.
【００２５】以上のようにして作製した１００枚のデイ
スク型単層コイルの前記マスクを剥がし、Ａｇ基板の端
部をＡｇロウで接続した。さらに上記と同様の溶射条件
でコイル内側の接続部には１５０μｍ、外側の接続部に
は１００μｍの溶射膜を形成した。The masks of the 100 disc type single layer coils produced as described above were peeled off, and the ends of the Ag substrates were connected with Ag solder. Further, under the same thermal spraying conditions as above, a sprayed film having a thickness of 150 μm was formed on the connection portion inside the coil and 100 μm on the connection portion outside the coil.
【００２６】以上のようにして作製した積層コイルを部
分溶融処理することによって超電導体とした。なお、部
分溶融処理は、８８５℃まで３時間かけて昇温し、１０
分間保持後、８１５℃まで降温して１０時間保持し、そ
の後３時間かけて室温まで冷却した。The laminated coil produced as described above was partially melted to obtain a superconductor. In the partial melting treatment, the temperature was raised to 885 ° C over 3 hours, and 10
After the temperature was maintained for 1 minute, the temperature was lowered to 815 ° C., the temperature was maintained for 10 hours, and then the temperature was cooled to room temperature over 3 hours.
【００２７】こうして得られたら旋状連続面の面間に外
径５０ｍｍ×内径１０ｍｍのデイスク状の円板の一部
を、径方向切り込みを入れた厚さ０.１ｍｍのアルミナ
シートを絶縁シートとして１枚ずつ挿入してヘリコイド
面の絶縁を図った。When thus obtained, a part of a disk-shaped disc having an outer diameter of 50 mm and an inner diameter of 10 mm was formed between the surfaces of the spiral continuous surface, and a 0.1 mm-thick alumina sheet having radial cuts was used as an insulating sheet. We inserted them one by one to insulate the helicoid surface.
【００２８】さらに、Ａｇ基板上の酸化物系超電導体に
クラックが生じない程度に５００ｇ／ｃｍ2の力を中心
軸方向に加えて圧縮し、この状態を保持したまゝエポキ
シ樹脂を真空含侵して、図３に示すような酸化物系超電
導コイルを製造した。Further, a force of 500 g / cm 2 was applied in the direction of the central axis so that the oxide-based superconductor on the Ag substrate was not cracked and compressed, and the epoxy resin was vacuum impregnated while maintaining this state. Thus, an oxide superconducting coil as shown in FIG. 3 was manufactured.
【００２９】このコイルは、液体窒素の沸点７７Ｋにお
いて、Ｉｃ＝１００Ａが流れ、０.３Ｔの最大磁場が発
生した。In this coil, at the boiling point of liquid nitrogen of 77K, Ic = 100A was flown and a maximum magnetic field of 0.3T was generated.
【００３０】一方、液体ヘリウムの沸点４.２Ｋにおい
ては、Ｉｃ＝８００Ａが流れ、２.０Ｔの最大磁場が発
生した。On the other hand, at the boiling point of liquid helium of 4.2 K, Ic = 800 A flows, and a maximum magnetic field of 2.0 T is generated.
【００３１】〔実施例２〕酸化物系超電導体原料とし
て、Ｙ2Ｏ3，ＢａＯ，ＣｕＯのそれぞれのモル比がＹ：
Ｂａ：Ｃｕ＝１.０：２.０：３.０になるよう配合し、
実施例１と同様にして溶射粉末を得た。Example 2 As an oxide superconductor raw material, the molar ratio of Y 2 O 3 , BaO and CuO was Y:
Blended so that Ba: Cu = 1.0: 2.0: 3.0,
A thermal spray powder was obtained in the same manner as in Example 1.
【００３２】該溶射粉末を用いて、実施例１と同様にデ
イスク型単層コイルを作製し、これを１００枚積層し
た。A disk type single layer coil was prepared in the same manner as in Example 1 using the thermal spraying powder, and 100 of these were laminated.
【００３３】このようにして作製された１００枚のデイ
スク型単層コイル同様に熱処理し、エポキシ樹脂を真空
含侵した酸化物系超電導コイルを製造した。Heat treatment was carried out in the same manner as the 100 disk type single layer coils thus produced to produce an oxide type superconducting coil which was impregnated with epoxy resin under vacuum.
【００３４】このコイルは、７７Ｋにおいて、Ｉｃ＝７
０Ａが流れ、０.１２Ｔの最大磁場が発生した。一方、
４.２Ｋにおいては、Ｉｃ＝６００Ａが流れ、１.０Ｔの
最大磁場が発生した。This coil has Ic = 7 at 77K.
0A flowed and a maximum magnetic field of 0.12T was generated. on the other hand,
At 4.2K, Ic = 600A flows and a maximum magnetic field of 1.0T is generated.
【００３５】〔実施例３〕酸化物系超電導体原料とし
て、ＢａＯ，ＳｒＯ，ＣａＯ，ＣｕＯのそれぞれのモル
比がＢａ：Ｓｒ：Ｃａ：Ｃｕ＝１.６：０.４：２.０：
３.０になるよう配合し、メノウ製乳鉢を備えたライカ
イ機で約２０分混合粉砕した。Example 3 As an oxide superconductor raw material, the molar ratio of BaO, SrO, CaO, CuO was Ba: Sr: Ca: Cu = 1.6: 0.4: 2.0:
The ingredients were blended so as to be 3.0, and mixed and pulverized for about 20 minutes with a raikai machine equipped with an agate mortar.
【００３６】上記粉末を磁性アルミナルツボにとり、大
気中８８０℃、２０時間焼成した。ふるいにより粒度調
整を行い酸化物系超電導体の溶射粉末を得た。The above powder was placed in a magnetic alumina crucible and fired in the air at 880 ° C. for 20 hours. The particle size was adjusted with a sieve to obtain thermal spray powder of oxide superconductor.
【００３７】実施例１と同様に溶射して作製した１００
枚のデイスク型単層コイルを、Ｔｌ雰囲気中８４０℃ま
で３時間で昇温し、２０時間保持した後、３時間で室温
まで冷却した。100 prepared by thermal spraying in the same manner as in Example 1.
The disc type single layer coil was heated to 840 ° C. in a Tl atmosphere for 3 hours, kept for 20 hours, and then cooled to room temperature for 3 hours.
【００３８】こうして得た、ら旋状連続面の面間に実施
例１と同様にしてエポキシ樹脂を真空含侵した酸化物系
超電導コイルを製造した。In the same manner as in Example 1, an oxide superconducting coil obtained by vacuum-impregnating an epoxy resin between the surfaces of the spiral continuous surfaces thus obtained was manufactured.
【００３９】このコイルは７７Ｋにおいて、Ｉｃ＝１０
０Ａが流れ、０.２Ｔの最大磁場が発生した。This coil has Ic = 10 at 77K.
0A flowed and a maximum magnetic field of 0.2T was generated.
【００４０】〔比較例１〕酸化物系超電導体原料とし
て、Ｂｉ2Ｏ3，ＳｒＣＯ3，ＣａＣＯ3，ＣｕＯのそれぞ
れのモル比がＢｉ：Ｓｒ：Ｃａ：Ｃｕ＝２.４：２.０：
１.０：２.０になるよう配合し、これを実施例１と同様
にして溶射粉末を得た。Comparative Example 1 As an oxide-based superconductor raw material, the molar ratio of Bi 2 O 3 , SrCO 3 , CaCO 3 , and CuO was Bi: Sr: Ca: Cu = 2.4: 2.0:
The blending ratio was set to 1.0: 2.0, and this was treated in the same manner as in Example 1 to obtain a sprayed powder.
【００４１】実施例１と同様にして溶射し、酸化物系超
電導体層の厚さが全面均一（膜厚１５０μｍ）な１００
枚のディスク型単層コイルを作製し、これを８８５℃ま
で３時間で昇温し、１０分間保持した後、８１５℃まで
降温して１０時間保持し、その後３時間かけて室温まで
冷却した。Thermal spraying was performed in the same manner as in Example 1 to obtain an oxide-based
100 with uniform thickness of the conductor layer (film thickness 150 μm)
To prepare a disc-type single-layer coil, which was heated for 3 hours to 885 ° C., it was maintained for 10 minutes, and held for 10 hours and cooled to 815 ° C., and cooled to room temperature over 3 hours .
【００４２】こうして得た、ら旋状連続面の面間に実施
例１と同様にしてエポキシ樹脂を真空含侵した酸化物系
超電導コイルを製造した。An oxide superconducting coil obtained by vacuum-impregnating an epoxy resin between the thus obtained spiral continuous surfaces was manufactured in the same manner as in Example 1.
【００４３】このコイルは７７ＫにおけるＩｃ＝３０Ａ
で、最大磁場０.０５Ｔであった。This coil has Ic = 30A at 77K.
The maximum magnetic field was 0.05T.
【００４４】[0044]
【発明の効果】本発明のヘリコイド面を有したデイスク
状コイルの酸化物系超電導体層の厚さがコイルの中央部
から端部に向かって減少するように形成したことによ
り、コイルの磁場の不均一性に基づく超電導特性の低下
を改善することができる。 The thickness of the oxide superconductor layer of the disk-shaped coil having the helicoid surface of the present invention is the central portion of the coil.
Since it is formed so as to decrease from the end portion to the end portion, it is possible to improve the deterioration of the superconducting property due to the non-uniformity of the magnetic field of the coil.
【図１】本発明の酸化物系超電導コイルの模式断面図で
ある。FIG. 1 is a schematic cross-sectional view of an oxide superconducting coil of the present invention.
【図２】本発明の単層の酸化物系超電導コイルの斜視図
である。FIG. 2 is a perspective view of a single-layer oxide superconducting coil of the present invention.
【図３】本発明の積層型酸化物系超電導コイルの斜視図
である。FIG. 3 is a perspective view of a laminated oxide-based superconducting coil of the present invention.
１…酸化物系超電導体、２…支持基板、３…単層コイ
ル、４…露出部、５…切込み部。DESCRIPTION OF SYMBOLS 1 ... Oxide superconductor, 2 ... Support substrate, 3 ... Single layer coil, 4 ... Exposed part, 5 ... Cut part.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加茂 友一 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所 日立研究所内 (56)参考文献 特開 昭63−293801（ＪＰ，Ａ) 特開 昭60−53003（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuichi Kamo 7-1, 1-1 Omika-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi Research Laboratory (56) Reference JP-A-63-293801 (JP, A) ) JP-A-60-53003 (JP, A)
Claims (4)
持基板と、該支持基板上に酸化物系超電導体層が形成さ
れたヘリコイド面を有するディスク状の超電導コイルで
あって、前記酸化物系超電導体層の厚さがコイルの中央
部から端部に向かって減少するように形成されているこ
とを特徴とする酸化物系超電導コイル。1. A supporting substrate surface layer is an electrically insulating the at no small, oxide superconductor layer on the support substrate is of form
A disk-shaped superconducting coil having a curved helicoid surface , wherein the thickness of the oxide-based superconducting layer is the center of the coil .
An oxide-based superconducting coil, characterized in that it is formed so as to decrease from the end to the end .
Ｃｕ、Ｏ），（Ｂｉ、Ｓｒ、Ｃａ、Ｃｕ、Ｏ），（Ｔ
ｌ、Ｂａ、Ｃａ、Ｃｕ、Ｏ）または（Ｔｌ、Ｐｂ、Ｓ
ｒ、Ｃａ、Ｃｕ、Ｏ）を主な構成元素とし、Ｌａまたは
／およびＮｄを含む請求項１に記載の酸化物系超電導コ
イル。 2. The oxide-based superconductor layer comprises (Y, Ba,
Cu, O), (Bi, Sr, Ca, Cu, O), (T
1, Ba, Ca, Cu, O) or (Tl, Pb, S
r, Ca, Cu, O) as main constituent elements, and La or
The oxide-based superconducting co- alloy according to claim 1, which contains / and Nd
Ile.
またはセラミックスあるいは可撓性のイットリア安定化
ジルコニア（ＹＳＺ）から選ばれる請求項１に記載の酸
化物系超電導コイル。 3. The support substrate is silver, gold or nickel based alloy
Or ceramics or flexible yttria stabilization
The acid according to claim 1, which is selected from zirconia (YSZ).
Compound superconducting coil.
る請求項１〜４のいずれかに記載の酸化物系超電導コイ
ル。 4. The superconducting coil is laminated in a plurality of layers.
The oxide-based superconducting carp according to any one of claims 1 to 4.
Le.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5026713A JPH0817127B2 (en) | 1993-02-16 | 1993-02-16 | Oxide superconducting coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5026713A JPH0817127B2 (en) | 1993-02-16 | 1993-02-16 | Oxide superconducting coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06244017A JPH06244017A (en) | 1994-09-02 |
| JPH0817127B2 true JPH0817127B2 (en) | 1996-02-21 |
Family
ID=12201004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5026713A Expired - Fee Related JPH0817127B2 (en) | 1993-02-16 | 1993-02-16 | Oxide superconducting coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0817127B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4634908B2 (en) * | 2005-10-24 | 2011-02-16 | 株式会社東芝 | High temperature superconducting coil |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6053003A (en) * | 1983-09-02 | 1985-03-26 | Toshiba Corp | Superconductive solenoid coil |
| JP2508722B2 (en) * | 1987-05-26 | 1996-06-19 | 日立電線株式会社 | Superconducting coil |
-
1993
- 1993-02-16 JP JP5026713A patent/JPH0817127B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06244017A (en) | 1994-09-02 |
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