JPH04115423A - Superconductive strand - Google Patents
Superconductive strandInfo
- Publication number
- JPH04115423A JPH04115423A JP2235377A JP23537790A JPH04115423A JP H04115423 A JPH04115423 A JP H04115423A JP 2235377 A JP2235377 A JP 2235377A JP 23537790 A JP23537790 A JP 23537790A JP H04115423 A JPH04115423 A JP H04115423A
- Authority
- JP
- Japan
- Prior art keywords
- plating layer
- strand
- wire
- coupling loss
- predetermined
- 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.)
- Pending
Links
- 238000007747 plating Methods 0.000 claims abstract description 29
- 229910018487 Ni—Cr Inorganic materials 0.000 claims abstract description 15
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 13
- 239000000956 alloy Substances 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 abstract description 15
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 abstract description 12
- 230000008878 coupling Effects 0.000 abstract description 9
- 238000010168 coupling process Methods 0.000 abstract description 9
- 238000005859 coupling reaction Methods 0.000 abstract description 9
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000009713 electroplating Methods 0.000 abstract description 5
- 229910001128 Sn alloy Inorganic materials 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 13
- 238000000576 coating method Methods 0.000 description 6
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 6
- 239000002887 superconductor Substances 0.000 description 6
- -1 chromium hydride Chemical compound 0.000 description 5
- 229910001320 chromium hydride Inorganic materials 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 4
- 239000005751 Copper oxide Substances 0.000 description 4
- 229910000431 copper oxide Inorganic materials 0.000 description 4
- 229910052718 tin Inorganic materials 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 3
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000011651 chromium Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 101100025832 Danio rerio nbas gene Proteins 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000010406 interfacial reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229910000657 niobium-tin Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000011800 void material Substances 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
- Wire Processing (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は超電導ストランドに関し、更に詳しくは、例え
ばその複数本をコンジット管に挿入してケーブル・イン
・コンジット導体を製造したとき、各超電導ストランド
間の接触抵抗が高く、その結果、超電導ストランド間の
結合損失の低減を可能にする超電導ストランドに関する
。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to superconducting strands, and more particularly, when a cable-in-conduit conductor is manufactured by inserting a plurality of strands into a conduit pipe, each superconducting strand The present invention relates to superconducting strands that have a high contact resistance between the superconducting strands, thereby making it possible to reduce coupling loss between the superconducting strands.
（従来の技術）
核融合炉用の大電流超電導導体の１つにケーブル・イン
・コンジット導体がある。この導体は、直径が約１−程
度の超電導ストランド（素線）を数百本束ねて撚線後コ
ンジット管の中に挿入し、管内に冷媒を導入した内部冷
却型の導体である。(Prior Art) A cable-in-conduit conductor is one of the high-current superconducting conductors for fusion reactors. This conductor is an internally cooled conductor in which several hundred superconducting strands (wires) with a diameter of about 1-100 mm are bundled together, twisted, inserted into a conduit pipe, and a refrigerant introduced into the pipe.
二の導体は、冷却周囲長が非常に長く、高い安定性が得
られるとともに、各超電導ストランドの表面に絶縁被覆
を施すことにより、互いの交流損失（結合損失）を非常
に小さくすることができるという利点を備えている。The second conductor has a very long cooling perimeter, providing high stability, and by applying an insulating coating to the surface of each superconducting strand, mutual AC loss (coupling loss) can be extremely reduced. It has the advantage of
ところで、上記したケーブル・イン・コンジット導体に
組込む超電導ストランドは概ね次のようにして製造され
る。例えば、Ｎｂ５Ｓｎ超電導体のストランドの場合、
まず、直径が５〜１０μｍ程度の複数本のＮｂ細線が所
定量のＳｎを含宵するＣｕ合金のマトリックス中に埋込
まれた複合体素線を製造し、この複合体素線の表面に絶
縁被膜を形成したのち６００〜７００℃程度の温度に加
熱して、Ｎｂ細線とマトリックスとの界面でＮｂとＳｎ
の界面反応を起させることにより、超電導性のＮｔ）ｓ
ＳｎをＮｂ細線の表面に生成させるのである。By the way, the superconducting strand to be incorporated into the cable-in-conduit conductor described above is generally manufactured as follows. For example, for a strand of Nb5Sn superconductor,
First, a composite wire in which multiple Nb thin wires with a diameter of about 5 to 10 μm are embedded in a Cu alloy matrix containing a predetermined amount of Sn is manufactured, and an insulating layer is placed on the surface of the composite wire. After forming the film, it is heated to a temperature of about 600 to 700°C, and Nb and Sn are separated at the interface between the Nb thin wire and the matrix.
By causing an interfacial reaction of superconducting Nt)s
Sn is generated on the surface of the Nb thin wire.
この場合、複合体素線の表面を被覆する絶縁被膜の材料
としては、Ｎ ｂ ｘ Ｓ ｎの生成に要する６００〜
７００℃程度の温度に耐え得る材料であることと、同時
に、ストランドの安定化材であるＣｕまたはＣｕ合金を
汚染しない材料であることが必要とされる。In this case, the material for the insulating film that covers the surface of the composite wire should be the 600~
The material is required to be able to withstand temperatures of about 700° C., and at the same time, it must be a material that does not contaminate the Cu or Cu alloy that is the stabilizing material for the strands.
従来、このような絶縁被膜としては、硫化銅の膜や酸化
銅の膜か一般に採用されている。これは、硫化銅や酸化
銅は摩擦係数が小さいので、ストランド間の滑りがよく
なり、ケーブル・イン・コンジット導体を曲げたときの
歪みを小さくすることができるからである。Conventionally, as such an insulating film, a film of copper sulfide or a film of copper oxide has generally been adopted. This is because copper sulfide and copper oxide have a small coefficient of friction, which improves the sliding between the strands and reduces distortion when the cable-in-conduit conductor is bent.
これら絶縁被膜のうち、例えば、硫化銅の絶縁被膜の場
合は、前記した複合体素線の表面に気相還元法を適用し
て表面部分を硫化銅にすることによって形成され、また
酸化銅の絶縁被膜の場合は複合体素線の表面に陽極酸化
法を適用することによって形成されている。Among these insulating coatings, for example, the insulating coating of copper sulfide is formed by applying a vapor phase reduction method to the surface of the composite wire described above to convert the surface portion into copper sulfide. In the case of an insulating coating, it is formed by applying an anodic oxidation method to the surface of the composite wire.
（発明が解決しようとする課題）
しかしながら、硫化銅や酸化銅の絶縁被膜で表面が被覆
されている上記複合体素線に対し、上記温度の熱処理を
施してＮｂａＳｎ超電導体を生成させた場合、素線表面
を被覆している硫化銅や酸化銅か昇華してしまうことが
ある。その結果、得られた超電導ストランドはその表面
絶縁が一部破壊され、大きな交流損失を引き起すことが
ある。(Problem to be Solved by the Invention) However, when the above composite wire whose surface is coated with an insulating film of copper sulfide or copper oxide is subjected to heat treatment at the above temperature to generate an NbaSn superconductor, Copper sulfide or copper oxide coating the wire surface may sublimate. As a result, the surface insulation of the obtained superconducting strands may be partially destroyed, causing large AC losses.
本発明は、このような問題を解決し、上記したＮｂａＳ
ｎの生成を目的とする熱処理によっても絶縁特性を失う
ことがなく、しかも安定化材であるＣｕやＣｕ合金を汚
染することのない絶縁被膜で被覆されていて、大電流超
電導導体に組込んだとき、ストランド間の結合損失を低
減することができる超電導ストランドの提供を目的とす
る。The present invention solves these problems, and the above-mentioned NbaS
It does not lose its insulating properties even when subjected to heat treatment for the purpose of generating n, and is coated with an insulating film that does not contaminate the stabilizing material Cu or Cu alloy. The present invention aims to provide a superconducting strand that can reduce coupling loss between the strands.
（課題を解決するための手段・作用）
上記した目的を達成するために、本発明においては、表
面がＮｉ−Ｃｒ合金めっき層で被覆されていることを特
徴とする超電導ストランドが提供される。(Means and effects for solving the problems) In order to achieve the above-described object, the present invention provides a superconducting strand whose surface is coated with a Ni-Cr alloy plating layer.
本発明の超電導ストランドは、表面を被覆している絶縁
被膜が電気めっき法を適用して形成されたＮｉ −Ｃｒ
合金めっき層であることを除いては、従来の超電導スト
ランドと変ることはない。The superconducting strand of the present invention has a Ni-Cr insulating film covering the surface formed by electroplating.
There is no difference from conventional superconducting strands except for the alloy plating layer.
このＮ１−（：「合金めっき層の厚みは１〜２゜μｍ程
度であることが好ましい。その理由は、厚みが１μｍよ
り薄い場合は、そのめっき層が有効な接触抵抗値を示さ
ずストランド間の結合損失の低減効果は小さくなり、ま
た厚みが２０μｍより厚くなると、効果が飽和して不経
済になるばかりではなく、超電導ストランドの冷却効果
が悪くなって超電導特性に影響を与えるような問題が生
ずるからである。より好ましい厚みは５〜１０μｍであ
る。It is preferable that the thickness of this N1-(: "alloy plating layer is about 1 to 2 μm. The reason is that if the thickness is thinner than 1 μm, the plating layer will not show an effective contact resistance value and will cause damage between the strands. The coupling loss reduction effect of the superconducting strand becomes small, and when the thickness becomes thicker than 20 μm, the effect not only becomes saturated and becomes uneconomical, but also the cooling effect of the superconducting strand deteriorates, causing problems such as affecting the superconducting properties. The more preferable thickness is 5 to 10 μm.
このＮｉ−Ｃｒ合金めっき層は、前記した複合体素線に
電気めっき法を適用して形成される。This Ni-Cr alloy plating layer is formed by applying an electroplating method to the above-described composite wire.
このときの対象となる複合体素線としては、熱処理によ
って、Ｎｂ５Ｓｎ超電導体を生成する素線やＶａＧａ超
電導体を生成する素線をあげることができる。Examples of the composite wire to be used in this case include a wire that produces a Nb5Sn superconductor and a wire that produces a VaGa superconductor by heat treatment.
電気めっきに用いるめっき浴としては、クエン酸を含む
ものが好ましく、具体的には、無水クロム酸８〜１５０
ｇ＃！、 クエン酸２５０〜３００ｇ／ｌ、硫酸ニッ
ケル７０〜１３０ｇ／ｌ、 クエン酸ソーダ５０〜９０
ｇ／１２の組成を有するめっき浴が好適である。As a plating bath used for electroplating, one containing citric acid is preferable, and specifically, chromic anhydride 8-150
g#! , citric acid 250-300g/l, nickel sulfate 70-130g/l, sodium citrate 50-90g/l
A plating bath with a composition of g/12 is preferred.
電気めっきの過程では、まず無水クロム酸の電気分解に
よって複合体素線の表面に水素化クロムが析出する。こ
の水素化クロムは不安定であるため、析出後に金属クロ
ムと水素に分解して、その過程で析出した被膜の収縮が
起り、その結果、Ｃｒめっき面にクラックが発現する。In the electroplating process, chromium hydride is first deposited on the surface of the composite wire by electrolysis of chromic anhydride. Since this chromium hydride is unstable, it decomposes into metallic chromium and hydrogen after precipitation, and during this process, the deposited film shrinks, resulting in cracks appearing on the Cr-plated surface.
そして、この水素化クロムの上記分解は、浴温が高けれ
ば高いほど迅速に進行する。The decomposition of chromium hydride proceeds more quickly as the bath temperature is higher.
このようなりラックが発生している複合体素線に、後述
する熱処理を施してＮｂ３Ｓｎ超電体を生成させようと
した場合には、このクラックの部分から素線の酸化が進
行して絶縁被膜の素線との密着性が低下するという不都
合を招く。When attempting to generate a Nb3Sn superconductor by subjecting a composite wire with such cracks to the heat treatment described below, the oxidation of the wire progresses from the cracked portion and the insulation coating is removed. This results in the inconvenience that the adhesion with the strands decreases.
したがって、このクラックの発生を防止するために、水
素化クロムが素線の表面に析出すると同時にこれを分解
し、そのときに発生するクラックの部分にただちにＮｉ
−Ｃｒを埋め込むという対応をとることが好ましくなる
。Therefore, in order to prevent the occurrence of cracks, chromium hydride is decomposed at the same time as it precipitates on the surface of the wire, and Ni is immediately applied to the cracks that occur at that time.
It is preferable to embed -Cr.
そのため、本発明においては、めっき浴の浴温を５５〜
６５℃と高く設定して、析出した水素化クロムの分解を
迅速に行なわせる処置を講じ、このときに発生したクラ
ックにＮｉ−Ｃｒを沈着させ、前記クラックにアンカー
効果を発揮させる。Therefore, in the present invention, the bath temperature of the plating bath is set at 55 to
The temperature is set as high as 65° C. to rapidly decompose the precipitated chromium hydride, and Ni-Cr is deposited on the cracks generated at this time to exert an anchoring effect on the cracks.
その結果、素線の表面との密着度が高いＮｉ−Ｃｒ合金
めっき層が形成される。As a result, a Ni-Cr alloy plating layer with high adhesion to the surface of the wire is formed.
なお、めっき時の電流密度は２０〜５０Ａ／ｄｍ２めっ
き時間は、複合めっき層の厚みにもよるか、３〜６分程
度であればよい。The current density during plating is 20 to 50 A/dm2. The plating time may be about 3 to 6 minutes depending on the thickness of the composite plating layer.
上記したＮｉ −Ｃｒ合金めっき層で被覆されている複
合体素線に、所定の温度で熱処理を施して、Ｎｂ、Ｓｎ
を生成せしめることにより、本発明の超電導ストランド
が得られる。The composite wire coated with the Ni-Cr alloy plating layer described above is heat-treated at a predetermined temperature to produce Nb, Sn,
The superconducting strand of the present invention can be obtained by producing the superconducting strand of the present invention.
その超電導ストランドは、Ｎｉ−Ｃｒ合金めっき層には
クラック等が発生していないので素線内部の酸化は発生
することなく、Ｎｂ、Ｓｎ超電導体が生成しており、か
つその表面がＮｉ−Ｃｒ合金から成る絶縁被膜で被覆さ
れている。In the superconducting strand, there are no cracks or the like in the Ni-Cr alloy plating layer, so oxidation does not occur inside the wire, and Nb and Sn superconductors are formed, and the surface is made of Ni-Cr. Covered with an insulating film made of an alloy.
（発明の実施例）
まず、無水クロム酸１００ｇ／ ｌ 、 クエン酸３
００ｇ／ｌ、硫酸ニッケル１００ｇ／ ｌ 、 クエ
ン酸ソーダ７０ｇ／ｌから成るめっき浴を建浴した。(Example of the invention) First, chromic anhydride 100g/l, citric acid 3
A plating bath was prepared containing 00 g/l of nickel sulfate, 100 g/l of nickel sulfate, and 70 g/l of sodium citrate.
直径３．４μｍのＮｂ線８０００本と、Ｃｕ −１４，
３％Ｓｎから成る複合体素線を用意し、これを、上記め
っき浴に浸漬して、６０±５℃の温度下において、電流
密度４０Ａ／ｄｍ２ （電圧３．８Ｖ、総電流２Ａ）で
電気めっきを行なった。めっき時間を変えて、素線表面
を２．５μｍ（３分の場合）、５μｍ（６分の場合）の
Ｎｉ−Ｃｒ合金めっき層で被覆した。8000 Nb wires with a diameter of 3.4 μm, Cu-14,
A composite wire consisting of 3% Sn was prepared, immersed in the above plating bath, and electrically applied at a current density of 40 A/dm2 (voltage 3.8 V, total current 2 A) at a temperature of 60 ± 5°C. Plating was performed. The surface of the wire was coated with a Ni-Cr alloy plating layer of 2.5 μm (in the case of 3 minutes) and 5 μm (in the case of 6 minutes) by changing the plating time.
ついで、これらの被覆線材を７００℃で８日間加熱して
、本発明の超電導ストランドを製造した。These coated wires were then heated at 700° C. for 8 days to produce superconducting strands of the present invention.
これらストランドの接触抵抗値はいずれも５０μΩ／
ｍｍ ’と非常に高い値を示した。The contact resistance value of these strands is 50μΩ/
It showed a very high value of mm'.
また、これらストランドの残留抵抗比（室温における抵
抗値／４．２Ｋにおける抵抗値）は１５０〜２００の間
にあり、このときの比抵抗値（ρ）ハ１．４〜１．７Ｘ
１０−’Ω−口であった。このことから、Ｎｉ−Ｃｒ合
金めっき層は安定化Ｃｕを汚染していないことが判明し
た。In addition, the residual resistance ratio (resistance value at room temperature/resistance value at 4.2K) of these strands is between 150 and 200, and the specific resistance value (ρ) at this time is 1.4 to 1.7X.
It was 10-'Ω-mouth. This revealed that the Ni-Cr alloy plating layer did not contaminate the stabilized Cu.
つぎに、めっき層の厚みがちがうこれらのストランドを
３５％、２０％のボイド率（冷媒流通部分の割合）でそ
れぞれコンジット管に挿入して４種類のケーブル・イン
・コンジット導体を製造し、これら導体の結合損失時定
数を測定した。その結果、いずれの導体の場合も、時定
数は１０〜２０ｍ５の範囲にあり、良好な結果を示した
。Next, four types of cable-in-conduit conductors were manufactured by inserting these strands with different plating layer thicknesses into conduit pipes with void ratios of 35% and 20% (ratio of refrigerant flow area), respectively. The coupling loss time constant of the conductor was measured. As a result, the time constant was in the range of 10 to 20 m5 for all conductors, showing good results.
（発明の効果）
以上の説明で明らかなように、本発明の超電導ストラン
ドは、その表面を被覆するＮｉ−Ｃｒ合金めっき層の接
触抵抗値が高く絶縁特性に優れており、したがって、こ
のストランドを用いたケーブル・イン・コンジット導体
のような大電流超電導導体においては、そのストランド
間の結合損失を低減することが可能になる。(Effects of the Invention) As is clear from the above explanation, the superconducting strand of the present invention has a high contact resistance value of the Ni-Cr alloy plating layer covering its surface and excellent insulation properties. In the high current superconducting conductor such as the cable-in-conduit conductor used, it becomes possible to reduce the coupling loss between the strands.
Claims (1)
特徴とする超電導ストランド。A superconducting strand characterized in that its surface is coated with a Ni-Cr alloy plating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2235377A JPH04115423A (en) | 1990-09-05 | 1990-09-05 | Superconductive strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2235377A JPH04115423A (en) | 1990-09-05 | 1990-09-05 | Superconductive strand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04115423A true JPH04115423A (en) | 1992-04-16 |
Family
ID=16985182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2235377A Pending JPH04115423A (en) | 1990-09-05 | 1990-09-05 | Superconductive strand |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04115423A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0755562A1 (en) * | 1994-04-11 | 1997-01-29 | New England Electric Wire Corporation | Superconductor cable and method of making |
| CN113445088A (en) * | 2021-06-28 | 2021-09-28 | 沈伟 | Vapor chamber with high heat absorption and preparation method thereof |
-
1990
- 1990-09-05 JP JP2235377A patent/JPH04115423A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0755562A1 (en) * | 1994-04-11 | 1997-01-29 | New England Electric Wire Corporation | Superconductor cable and method of making |
| EP0755562A4 (en) * | 1994-04-11 | 1998-05-06 | New England Electric Wire | Superconductor cable and method of making |
| CN113445088A (en) * | 2021-06-28 | 2021-09-28 | 沈伟 | Vapor chamber with high heat absorption and preparation method thereof |
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