JPH04292808A - Multicore superconductive wire - Google Patents
Multicore superconductive wireInfo
- Publication number
- JPH04292808A JPH04292808A JP3056693A JP5669391A JPH04292808A JP H04292808 A JPH04292808 A JP H04292808A JP 3056693 A JP3056693 A JP 3056693A JP 5669391 A JP5669391 A JP 5669391A JP H04292808 A JPH04292808 A JP H04292808A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- superconducting
- multicore
- metal
- coated
- 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
- 239000000463 material Substances 0.000 claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000002887 superconductor Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000005452 bending Methods 0.000 abstract description 11
- 239000000843 powder Substances 0.000 abstract description 9
- 239000011230 binding agent Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000000919 ceramic Substances 0.000 abstract description 3
- 239000000314 lubricant Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 abstract 1
- 239000001993 wax Substances 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910001316 Ag alloy Inorganic materials 0.000 description 3
- 229910052797 bismuth Inorganic materials 0.000 description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910052716 thallium Inorganic materials 0.000 description 2
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000005491 wire drawing 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
【０００１】0001
【産業上の利用分野】この発明は、酸化物高温超電導材
料を用いた多芯超電導線に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a multicore superconducting wire using an oxide high-temperature superconducting material.
【０００２】0002
【従来の技術】近年、より高い臨界温度を示す超電導材
料として、セラミックス系、すなわち酸化物系の超電導
体が注目されている。中でも、イットリウム系が９０Ｋ
、ビスマス系が１１０Ｋ、タリウム系が１２０Ｋ程度の
高い臨界温度を有し、実用化が期待されている。これら
の高温超電導材料は、ケーブル、ブスバー、パワーリー
ドおよびコイルなどに応用することが考えられている。2. Description of the Related Art In recent years, ceramic-based, ie, oxide-based superconductors have attracted attention as superconducting materials exhibiting higher critical temperatures. Among them, yttrium is 90K.
, the bismuth type has a high critical temperature of about 110K, and the thallium type has a high critical temperature of about 120K, and their practical use is expected. These high-temperature superconducting materials are considered to be applied to cables, busbars, power leads, coils, etc.
【０００３】0003
【発明が解決しようとする課題】しかしながら、これら
の酸化物高温超電導材料を、ケーブル、およびコイルな
どに応用しようとする場合、曲げた状態での超電導特性
が優れていることが必要となる。[Problems to be Solved by the Invention] However, when these oxide high temperature superconducting materials are to be applied to cables, coils, etc., it is necessary that they have excellent superconducting properties in a bent state.
【０００４】この発明の目的は、このような曲げた状態
における超電導特性に優れた多芯超電導線を提供するこ
とにある。An object of the present invention is to provide a multicore superconducting wire that has excellent superconducting properties in such a bent state.
【０００５】[0005]
【課題を解決するための手段】この発明の多芯超電導線
は、金属被覆した酸化物超電導体を複数束ねて形成され
る多芯超電導線であり、金属被覆の表面に固着防止材が
塗布されていることを特徴としている。[Means for Solving the Problems] The multicore superconducting wire of the present invention is a multicore superconducting wire formed by bundling a plurality of metal-coated oxide superconductors, and an anti-sticking material is applied to the surface of the metal coating. It is characterized by
【０００６】この発明に用いられる固着防止材としては
、複数束ねられる金属被覆同志で、互いに固着しないよ
う防止することのできる材料であれば特に限定されるも
のではないが、たとえば、油、潤滑材、ワックス、蝋、
セラミックス粉末、有機バインダ、無機バインダおよび
これらの混合物などを用いることができる。[0006] The anti-sticking material used in the present invention is not particularly limited as long as it is a material that can prevent a plurality of bundled metal coatings from sticking to each other, but examples include oil and lubricants. , wax,
Ceramic powder, organic binders, inorganic binders, mixtures thereof, and the like can be used.
【０００７】超電導ケーブルやコイル、特に超電導ケー
ブルでは、焼結させて超電導特性を有した超電導線を撚
り合わせて導体としているが、これらの導体は種々の工
程および敷設の際に曲げの応力を受ける。したがって、
このような曲げに対して性能の劣化のない超電導線が要
求される。この発明では、このような曲げに対して性能
劣化をしないような超電導線とするため、金属被覆の表
面に固着防止材を塗布している。[0007] Superconducting cables and coils, especially superconducting cables, are made by twisting sintered superconducting wires that have superconducting properties to form a conductor, but these conductors are subject to bending stress during various processes and during installation. . therefore,
A superconducting wire that does not deteriorate in performance under such bending is required. In the present invention, an anti-sticking material is applied to the surface of the metal coating in order to create a superconducting wire that does not deteriorate in performance due to such bending.
【０００８】この発明の多芯超電導線は、たとえば、銀
パイプに超電導材料あるいは目的とする超電導材料とな
る粉末を充填し、所望の線径にまで伸線した後、その表
面に固着防止材を塗布し、これらを複数本束ねて再度銀
パイプに挿入し、伸線加工または圧延加工により、丸線
またはテープ状の線材に加工することによって得ること
ができる。必要によって加工の中間段階または最終段階
で、焼結・熱処理を施すこともできる。The multicore superconducting wire of the present invention can be obtained by, for example, filling a silver pipe with a superconducting material or a powder serving as the desired superconducting material, drawing the wire to a desired wire diameter, and then applying an anti-sticking material to the surface of the wire. It can be obtained by coating a plurality of wires, bundling them together, reinserting them into a silver pipe, and processing them into a round wire or tape-shaped wire rod by wire drawing or rolling. If necessary, sintering and heat treatment can be performed during the intermediate or final stage of processing.
【０００９】この発明において金属被覆の表面に塗布さ
れた固着防止材は、最終的に除去することができる。金
属表面への固着防止材の塗布により、微細な酸化物超電
導体のフィラメントにすることができ、曲げ状態におけ
る超電導特性に優れた超電導線とすることができる。[0009] In the present invention, the anti-sticking material applied to the surface of the metal coating can be finally removed. By applying an anti-adhesion material to the metal surface, fine filaments of oxide superconductor can be formed, and a superconducting wire with excellent superconducting properties in a bent state can be obtained.
【００１０】また、この発明において、固着防止材は除
去せずに最終的に残しておいてもよい。このような場合
、固着防止材は曲げの緩衝材の役割を果たし、曲げ状態
における超電導特性に優れた超電導線とすることもでき
る。Furthermore, in the present invention, the anti-sticking material may be left in place without being removed. In such a case, the anti-sticking material serves as a bending buffer, and the superconducting wire can have excellent superconducting properties in a bent state.
【００１１】また、この発明の多芯超電導線は、種々の
工程において歪みを制御して用いられることが好ましく
、０．３％以下の歪み（歪み＝線の厚み／曲げの直径）
を与える状態で、巻取りおよび繰出しなどの工程がなさ
れることが好ましい。[0011] Furthermore, the multicore superconducting wire of the present invention is preferably used in various processes with strain controlled, and the strain is 0.3% or less (strain = wire thickness/bending diameter).
It is preferable that steps such as winding and unwinding are performed in a state where the following conditions are provided.
【００１２】また、この発明において、固着防止材を除
去せずに使用する場合には、超電導体の厚みが全体の厚
みの５％以下に分割されていることが好ましい。このよ
うな分割により、繰返し歪みを、０．３％以下の値に制
御すれば、より超電導特性の劣化を防止することができ
好ましい。Further, in the present invention, when the superconductor is used without removing the anti-sticking material, it is preferable that the thickness of the superconductor is divided into 5% or less of the total thickness. It is preferable to control the cyclic strain to a value of 0.3% or less by such division, since deterioration of the superconducting properties can be further prevented.
【００１３】このような超電導線は、たとえばテープ状
の線材の形をしており、熱処理後、繰り出され、リール
やドラムなどに巻取り、ケーブルやコイルに用いられる
。この巻取りなどにおいても、歪みが０．３％以下であ
ることが好ましい。[0013] Such a superconducting wire is, for example, in the form of a tape-like wire, and after heat treatment, it is unwound, wound onto a reel or drum, and used for cables or coils. Also in this winding process, it is preferable that the distortion is 0.3% or less.
【００１４】この発明においては、金属被覆された酸化
物超電導体を用いており、金属被覆は安定性の点で好ま
しい。金属の種類としては、酸化物超電導体と反応せず
、加工性が良好で安定化材として機能するような比抵抗
の小さなものがよく、たとえば銀および銀合金が用いら
れる。[0014] In the present invention, a metal-coated oxide superconductor is used, and metal coating is preferable in terms of stability. As for the type of metal, it is preferable to use a metal that does not react with the oxide superconductor, has good workability, and has a low specific resistance so that it functions as a stabilizing material, such as silver and silver alloys.
【００１５】銀および銀合金は、酸化物超電導体を被覆
するのに用いることができるが、中間層として用いるこ
ともできる。中間層として用いられる場合には、その上
に別の金属、たとえば銅やアルミニウムまたはそれらの
合金がさらに被覆される。Silver and silver alloys can be used to coat oxide superconductors, but can also be used as interlayers. When used as an intermediate layer, another metal such as copper, aluminum or an alloy thereof is further coated thereon.
【００１６】酸化物超電導体としては、たとえば、イッ
トリウム系、ビスマス系、およびタリウム系のものが用
いられる。臨界温度、臨界電流密度および毒性の少ない
こと、ならびに希土類元素を必要としない点でビスマス
系が好ましい。As the oxide superconductor, for example, yttrium-based, bismuth-based, and thallium-based ones are used. Bismuth-based materials are preferred because of their low critical temperature, critical current density and toxicity, and because they do not require rare earth elements.
【００１７】[0017]
【発明の作用効果】この発明の多芯超電導線は、金属被
覆の表面に固着防止材が塗布されている。このため、１
０から数μｍ以下の微細な酸化物超電導体のフィラメン
トにすることができ、曲げ状態における超電導特性に優
れた超電導線とすることができる。Effects of the Invention In the multicore superconducting wire of the present invention, an anti-adhesion material is coated on the surface of the metal coating. For this reason, 1
It can be made into fine oxide superconductor filaments of 0 to several micrometers or less, and can be made into a superconducting wire with excellent superconducting properties in a bent state.
【００１８】固着防止材は除去してもよいし除去せずと
もよい。固着防止材を除去しない場合は、上記の微細な
フィラメントによる効果に加えて、さらに固着防止材が
曲げ応力を受けたときに、固着防止材が曲げの緩衝材の
役割を果たし、さらに曲げ状態における超電導特性に優
れた超電導線とすることができる。The anti-sticking material may or may not be removed. If the anti-sticking material is not removed, in addition to the effect of the fine filaments mentioned above, when the anti-sticking material is subjected to bending stress, the anti-sticking material acts as a buffer for bending, and furthermore, when the anti-sticking material is subjected to bending stress, A superconducting wire with excellent superconducting properties can be obtained.
【００１９】[0019]
【実施例】実施例１
Ｂｉ：Ｐｂ：Ｓｒ：Ｃａ：Ｃｕ＝１．８５：０．３５：
１．９９：２．２０：３．０１の組成を持つように、酸
化物または炭酸塩を混合し、熱処理により、２２１２相
が８７％、２２２３相が１３％、（Ｃａ，Ｓｒ）２ Ｐ
ｂＯ４ およびＣａ２ ＣｕＯ３ を主成分とする非超
電導相を含む粉末を準備した。この粉末を、１０ｔｏｒ
ｒの減圧雰囲気で７００℃１２時間の脱ガス処理を施し
た。[Example] Example 1 Bi:Pb:Sr:Ca:Cu=1.85:0.35:
Oxides or carbonates are mixed to have a composition of 1.99:2.20:3.01, and heat treatment results in 87% 2212 phase, 13% 2223 phase, (Ca,Sr)2P
A powder containing a non-superconducting phase mainly composed of bO4 and Ca2CuO3 was prepared. This powder was heated to 10 torr.
Degassing treatment was performed at 700° C. for 12 hours in a reduced pressure atmosphere of r.
【００２０】この粉末を、外径１２ｍｍ、内径８ｍｍの
銀で被覆し、直径１．８ｍｍまで伸線加工した。加工後
の線材の表面に、アルミナ粒子を含んだセルロース系の
バインダを固着防止材として塗布した。塗布した線材を
３６本束ね、さらに外径１６．５ｍｍ内径１３．５ｍｍ
の銀パイプに入れて、直径１．０ｍｍまで伸線加工した
。さらに、その後０．１７ｍｍの厚みまで圧延加工した
。This powder was coated with silver having an outer diameter of 12 mm and an inner diameter of 8 mm, and was wire-drawn to a diameter of 1.8 mm. A cellulose-based binder containing alumina particles was applied to the surface of the processed wire as an anti-sticking material. 36 coated wire rods are bundled, and the outer diameter is 16.5 mm and the inner diameter is 13.5 mm.
It was placed in a silver pipe and wire-drawn to a diameter of 1.0 mm. Furthermore, it was then rolled to a thickness of 0.17 mm.
【００２１】この線材を、８４５℃、５５時間熱処理し
、その後１２％の加工度で圧延した。得られた線材を外
径５０ｍｍの円筒に巻きつけ、８４０℃、５０時間熱処
理した。[0021] This wire rod was heat treated at 845°C for 55 hours and then rolled at a workability of 12%. The obtained wire rod was wound around a cylinder having an outer diameter of 50 mm, and heat treated at 840° C. for 50 hours.
【００２２】この円筒から処理後の線材を繰出し、直径
５０ｍｍのテフロンパイプにピッチ８０ｍｍで巻きつけ
た。この状態および半径１００ｍｍで曲げを２０回繰返
した後、液体窒素温度での臨界電流密度を測定した。The treated wire rod was fed out from this cylinder and wound around a Teflon pipe having a diameter of 50 mm at a pitch of 80 mm. After repeating the bending in this state and with a radius of 100 mm 20 times, the critical current density at liquid nitrogen temperature was measured.
【００２３】液体窒素温度での臨界電流密度は、いずれ
も安定しており、１５，２００〜１６，８００Ａ／ｃｍ
２ を示した。また、このときの歪み量としては、０．
３％から３％の範囲内であり、曲げに対し良好な特性を
示した。The critical current density at liquid nitrogen temperature is stable, ranging from 15,200 to 16,800 A/cm.
2 was shown. Also, the amount of distortion at this time is 0.
It was within the range of 3% to 3%, and showed good properties against bending.
【００２４】実施例２
Ｂｉ：Ｐｂ：Ｓｒ：Ｃａ：Ｃｕ＝１．８２：０．３７：
２．０２：１．９８：３．０１の組成を持つように、酸
化物または炭酸塩を混合し、熱処理により、２２１２相
が８９％、２２２３相が１１％であり、残りが（Ｃａ，
Ｓｒ）２ ＰｂＯ４ およびＣａ２ ＣｕＯ３ を主と
する非超電導相からなる粉末を準備した。この粉末を、
９ｔｏｒｒの減圧雰囲気で７２０℃、１８時間の脱ガス
処理を施した。Example 2 Bi:Pb:Sr:Ca:Cu=1.82:0.37:
Oxides or carbonates are mixed to have a composition of 2.02:1.98:3.01, and by heat treatment, the 2212 phase accounts for 89%, the 2223 phase accounts for 11%, and the remainder is (Ca,
A powder consisting of a non-superconducting phase mainly consisting of Sr)2PbO4 and Ca2CuO3 was prepared. This powder,
Degassing treatment was performed at 720° C. for 18 hours in a reduced pressure atmosphere of 9 torr.
【００２５】この粉末を、実施例１と同様の工程で加工
し、固着防止材として、マグネシアを含んだセルロース
を用い、これを金属被覆の表面に塗布し、この線材を９
０本束ねて実施例１と同様にして多芯線を作製した。This powder was processed in the same process as in Example 1, cellulose containing magnesia was used as an anti-adhesion material, and this was applied to the surface of the metal coating, and the wire rod was
A multifilamentary wire was produced in the same manner as in Example 1 by bundling 0 wires.
【００２６】この多芯線を２ｍｍまで伸線し、０．３８
ｍｍの厚みまで圧延加工した。この線材を８４５℃、６
０時間熱処理し、その後２０％の加工度で圧延した。[0026] This multifilamentary wire was drawn to a thickness of 0.38 mm.
It was rolled to a thickness of mm. This wire was heated to 845℃, 6
It was heat treated for 0 hours and then rolled at a workability of 20%.
【００２７】このテープ状の線材の最外層の銀の長手方
向の両端を切り落とし、１本１本の線材を取出し、８４
０℃、５５時間熱処理した。Cut off both ends of the outermost layer of silver in the longitudinal direction of this tape-shaped wire rod, take out each wire rod, and
Heat treatment was performed at 0°C for 55 hours.
【００２８】この線材を、半径５０ｍｍの曲率で曲げ、
液体窒素温度での臨界電流密度を測定した。熱処理後お
よび曲げ状態での液体窒素温度での臨界電流密度は、い
ずれも、１３，０００〜１５，５００Ａ／ｃｍ２ の臨
界電流密度であった。[0028] This wire is bent with a curvature of 50 mm radius,
The critical current density at liquid nitrogen temperature was measured. The critical current density at liquid nitrogen temperature after heat treatment and in the bent state was 13,000 to 15,500 A/cm2.
Claims (1)
ねて形成される多芯超電導線であって、前記金属被覆の
表面に固着防止材が塗布されていることを特徴とする、
多芯超電導線。1. A multicore superconducting wire formed by bundling a plurality of metal-coated oxide superconductors, characterized in that the surface of the metal coating is coated with an anti-adhesion material,
Multicore superconducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3056693A JP2861444B2 (en) | 1991-03-20 | 1991-03-20 | Multi-core superconducting wire and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3056693A JP2861444B2 (en) | 1991-03-20 | 1991-03-20 | Multi-core superconducting wire and its processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04292808A true JPH04292808A (en) | 1992-10-16 |
| JP2861444B2 JP2861444B2 (en) | 1999-02-24 |
Family
ID=13034534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3056693A Expired - Lifetime JP2861444B2 (en) | 1991-03-20 | 1991-03-20 | Multi-core superconducting wire and its processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2861444B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002015629A (en) * | 2000-06-30 | 2002-01-18 | Fujikura Ltd | Superconductive cable |
| JP2008181794A (en) * | 2007-01-25 | 2008-08-07 | Sumitomo Electric Ind Ltd | Manufacturing method of oxide superconducting wire material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63225412A (en) * | 1986-12-15 | 1988-09-20 | 住友電気工業株式会社 | Heat processing of multi-core superconductor |
-
1991
- 1991-03-20 JP JP3056693A patent/JP2861444B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63225412A (en) * | 1986-12-15 | 1988-09-20 | 住友電気工業株式会社 | Heat processing of multi-core superconductor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002015629A (en) * | 2000-06-30 | 2002-01-18 | Fujikura Ltd | Superconductive cable |
| JP4722258B2 (en) * | 2000-06-30 | 2011-07-13 | 株式会社フジクラ | Superconducting cable |
| JP2008181794A (en) * | 2007-01-25 | 2008-08-07 | Sumitomo Electric Ind Ltd | Manufacturing method of oxide superconducting wire material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2861444B2 (en) | 1999-02-24 |
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