JPH01194213A - Manufacture of complex oxide superconductive multi-core wire material - Google Patents
Manufacture of complex oxide superconductive multi-core wire materialInfo
- Publication number
- JPH01194213A JPH01194213A JP63016651A JP1665188A JPH01194213A JP H01194213 A JPH01194213 A JP H01194213A JP 63016651 A JP63016651 A JP 63016651A JP 1665188 A JP1665188 A JP 1665188A JP H01194213 A JPH01194213 A JP H01194213A
- Authority
- JP
- Japan
- Prior art keywords
- complex
- composite
- metal
- billet
- wire material
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 title abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000002775 capsule Substances 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 10
- 239000002887 superconductor Substances 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims description 52
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 3
- 229910052691 Erbium Inorganic materials 0.000 abstract description 2
- 229910052689 Holmium Inorganic materials 0.000 abstract description 2
- 229910052765 Lutetium Inorganic materials 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 229910052727 yttrium Inorganic materials 0.000 abstract description 2
- 229910052692 Dysprosium Inorganic materials 0.000 abstract 1
- 229910052775 Thulium Inorganic materials 0.000 abstract 1
- 229910052769 Ytterbium Inorganic materials 0.000 abstract 1
- 229910052711 selenium Inorganic materials 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000010949 copper Substances 0.000 description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 12
- 229910052802 copper Inorganic materials 0.000 description 12
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 6
- 239000004332 silver Substances 0.000 description 6
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 235000011293 Brassica napus Nutrition 0.000 description 1
- 240000008100 Brassica rapa Species 0.000 description 1
- 235000000540 Brassica rapa subsp rapa Nutrition 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000886 hydrostatic extrusion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000003466 welding 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、複合酸化物系超電導多芯線材の製造方法に関
し、特に長尺で巻線等に加工しやすい多芯線材を得るの
に有用である。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a composite oxide superconducting multicore wire, and is particularly useful for obtaining a long multicore wire that is easy to process into winding wires, etc. It is.
従来、合金系超電導線材が知られているが、近年、より
優れた超電導特性をもつ複合酸化物による超電導線材が
開発されている。Conventionally, alloy-based superconducting wires have been known, but in recent years, superconducting wires made of composite oxides with even better superconducting properties have been developed.
複合酸化物による超電導線材の製造方法としては、例え
ば複合酸化物粉末をバインダーに混ぜてダイスを通して
押出して糸状に成形し、焼結する技術が知られている。As a method for manufacturing a superconducting wire using a composite oxide, a technique is known in which, for example, composite oxide powder is mixed with a binder, extruded through a die, formed into a thread, and sintered.
また、複合酸化物粉末を金属管中に詰め込み、これをス
ウェージ、線引き。Additionally, composite oxide powder is packed into a metal tube, which is then swaged and drawn.
圧延などによって線状に加工し、熱処理する技術が知ら
れている。A technique is known in which the material is processed into a linear shape by rolling or the like and then heat treated.
上記の複合酸化物系超電導線材は、いわば単芯線材であ
り、多芯線材ではない、しかし、線材を例えば巻線に加
工する場合に断線等を生じないためには、単芯の線材よ
りも多芯の線材とするのが好ましい。The above-mentioned composite oxide superconducting wire is a single-core wire and not a multi-core wire.However, in order to avoid breakage when processing the wire into a winding wire, it is necessary to It is preferable to use a multicore wire.
しかるに、複合酸化物粉末を用いた多芯線材の製造方法
は従来知られていない。However, a method for producing a multifilamentary wire using composite oxide powder has not been known so far.
したがって、本発明の目的とするところは、複合酸化物
粉末を用いて多芯の超電導線材を製造する方法を提供す
ることにある。Therefore, an object of the present invention is to provide a method for manufacturing a multicore superconducting wire using composite oxide powder.
本発明の複合酸化物系超電導多芯線材の製造方法は、複
合酸化物系超電導体の粉末をバインダーに混ぜて棒状に
押出し、焼結し、焼結棒を得る工程、上記焼結棒を金属
管内に挿入し、複合棒を得る工程、複数の上記複合棒を
金属カプセル内に収容し、複合ビレットを得る工程、お
よび、上記複合ビレットを８００℃以上９５０℃以下の
温度で熱間静水圧押出しし、多芯線材を得る工程を具備
することを構成上の特徴とするものである。The method for producing a composite oxide superconducting multicore wire of the present invention includes a step of mixing composite oxide superconductor powder with a binder, extruding it into a rod shape, and sintering it to obtain a sintered rod. A step of inserting the composite rod into a pipe to obtain a composite rod, a step of accommodating a plurality of the composite rods in a metal capsule to obtain a composite billet, and hot isostatic extrusion of the composite billet at a temperature of 800° C. or higher and 950° C. or lower. The structure is characterized in that it includes a step of obtaining a multifilamentary wire.
上記構成において、複合酸化物系超電導体としては、Ｌ
ｎ Ｂｉ ２ Ｃｕ ３０ｘ （ＬｎはＹ、Ｌｕ。In the above configuration, the composite oxide superconductor is L
n Bi 2 Cu 30x (Ln is Y, Lu.
Ｙｂ 、Ｔｅａ ＋ Ｅｒ 、Ｈｏ ＋ Ｄｙ 、Ｓ
ｅを表す、Ｘは製造条件で決まる酸化数を表す、）を具
体例として挙げられる。Yb, Tea + Er, Ho + Dy, S
(X represents the oxidation number determined by the manufacturing conditions) is given as a specific example.
バインダーとしては、熱可塑性樹脂と揮発性溶媒の混合
材（例えばエポキシ系樹脂とアルコールの混合液）を具
体例として挙げられる。A specific example of the binder is a mixture of a thermoplastic resin and a volatile solvent (for example, a mixture of an epoxy resin and alcohol).
金属管としては、鋼管、 ！ｆｉｌ系合金管（例えば銅
二・７ケル管やｌｉＩ銀クラッド管）、銀管を用いるこ
とが出来る。Steel pipes are the metal pipes! A fil-based alloy tube (for example, a copper 2.7 Kel tube or a LiI silver clad tube) or a silver tube can be used.
金属カプセルとしては、銅カプセル、銅系合金カプセル
、銀カプセルを用いることが出来る。As the metal capsule, a copper capsule, a copper-based alloy capsule, or a silver capsule can be used.
（作用〕
本発明の製造方法では、複合酸化物系超電導体の粉末を
焼結棒にして金属管内に挿入し、複合棒を得ている。こ
こで、焼結棒は固体であるから、長尺に形成しても容易
に管内に挿入することが出来る。したがって、長尺の複
合棒を容易に得ることが出来る。なお、粉体のままでは
長尺の管に充填するのが困難であり、長尺の複合棒を得
にくい。(Function) In the manufacturing method of the present invention, a composite oxide superconductor powder is made into a sintered rod and inserted into a metal tube to obtain a composite rod. Even if it is formed into a long shape, it can be easily inserted into a pipe. Therefore, a long composite rod can be easily obtained. However, it is difficult to fill a long pipe as it is in powder form. , it is difficult to obtain long composite rods.
次に、多数の複合棒を金属カプセル内に収容して複合ビ
レットを得、その複合ビレットを８００℃〜９５０℃の
温度で熱間静水圧押出しするが、高温であり且つ金属被
覆しているから、高減面率の押出しが可能であり、所望
の線径の線材をワンパスで得ることが出来るようになる
。Next, a large number of composite rods are housed in a metal capsule to obtain a composite billet, and the composite billet is hot isostatically extruded at a temperature of 800°C to 950°C. , it is possible to extrude with a high area reduction rate, and a wire rod with a desired wire diameter can be obtained in one pass.
そして、静水圧押出しであるために、材料の流れが均一
となり、均一な変形となる。この結果、複合酸化物と金
属の複合比を一様に出来るので、線材としての品質を高
めることが出来る。Since it is hydrostatic extrusion, the flow of the material is uniform, resulting in uniform deformation. As a result, the composite ratio of the composite oxide and metal can be made uniform, so that the quality of the wire can be improved.
言うまでもなく、多芯線材であるから、加工性が向上す
る。Needless to say, since it is a multi-filamentary wire, workability is improved.
以下、図面を参照し、本発明の実施例について説明する
。ここに第１図は複合酸化物系超電導体の粉末とバイン
ダーとを混合した状態を示す断面図、第２図は棒状に押
出しする状態を示す断面図、第３図は焼結棒と金属管の
斜視図、第４図は複合棒の斜視図、第５図は複合ビレッ
トの断面図、第６図は複合ビレットを熱間静水圧押出し
する状態の断面図である。なお、この実施例により本発
明が限定されるものではない。Embodiments of the present invention will be described below with reference to the drawings. Here, Fig. 1 is a cross-sectional view showing a state in which composite oxide superconductor powder and a binder are mixed, Fig. 2 is a cross-sectional view showing a state in which it is extruded into a rod shape, and Fig. 3 is a sintered rod and a metal tube. 4 is a perspective view of a composite rod, FIG. 5 is a cross-sectional view of a composite billet, and FIG. 6 is a cross-sectional view of the composite billet in a state of hot isostatic extrusion. Note that the present invention is not limited to this example.
Ｙ２０３ ＋ Ｂｌ ＣＯ３，ＣｕＯ粉末（−３５０ｍ
ｅｓｈ）をＹ：Ｂ、：Ｃｕ原子比が１：２：３となるよ
うに配合し、９００℃Ｘ１２Ｍ熱処理（０２雰囲気）を
行い、仮焼体を得た。この仮焼体がＹＢａ ２ Ｃｕ
ｚ Ｏｘ ＩＩＩ化物であることをＸ線回折により確認
した。Y203 + Bl CO3, CuO powder (-350m
esh) were blended so that the Y:B, :Cu atomic ratio was 1:2:3, and heat treatment was performed at 900°C for 12M (02 atmosphere) to obtain a calcined body. This calcined body is YBa 2 Cu
It was confirmed by X-ray diffraction that it was a z Ox III compound.
この仮焼体をボールミルによって５ｈｒ粉砕し、粉末を
得た。This calcined body was ground for 5 hours using a ball mill to obtain a powder.
コ（７） Ｙ Ｂ ＠ ２ Ｃｕ ３０ ｘ粉末を、エ
ポキシ系樹脂とアルコールを混合した混合液に混ぜ合わ
せ、第１図に示す如き可塑物１とした。The (7) Y B @ 2 Cu 30 x powder was mixed with a liquid mixture of an epoxy resin and alcohol to form a plastic material 1 as shown in FIG.
この可塑物１を、第２図に示すようにダイス２を通して
押出しし、直径４ｍ−１長さ２０ＣＩｍの棒材３を得た
。この棒材３を９５０’ＣＸ１ｈｒの加熱により脱バイ
ンダー処理し、第３図に示す如き焼結棒４を得た。This plastic material 1 was extruded through a die 2 as shown in FIG. 2 to obtain a bar 3 having a diameter of 4 m and a length of 20 CI m. This bar 3 was subjected to a binder removal treatment by heating at 950'CX 1 hr to obtain a sintered bar 4 as shown in FIG.
他方、外径６７龍、内径２５鰭の銅円筒の内面に、外Ｐ
１２４．９ ＋ｎ、内径２０．０ ｍの銀円筒を挿入し
、両者を両端で真空中にて溶接し、次に、７５０℃で熱
間静水圧押出しし、外径ｌ０ｍ５．内径７龍の銅／銀複
合管を得た。さらに、冷間引き抜きを繰り返し、第３図
に示す如き六角形管５とした。On the other hand, on the inner surface of a copper cylinder with an outer diameter of 67 fins and an inner diameter of 25 fins, an outer P
124.9 +n, a silver cylinder with an inner diameter of 20.0 m was inserted, and both ends were welded in a vacuum, and then hot isostatic extrusion was performed at 750°C, and an outer diameter of 10 m5. A copper/silver composite tube with an inner diameter of 7 mm was obtained. Furthermore, cold drawing was repeated to form a hexagonal tube 5 as shown in FIG.
この六角形管５の対辺寸法は４．７ ｍであり、内径は
４．２酊である。内面には銀がクラッドされている。The hexagonal tube 5 has an opposite side dimension of 4.7 m and an inner diameter of 4.2 m. The inside is clad with silver.
次に、焼結棒４を六角形管５内に挿入し、第４図に示す
如き複合棒６を得た。Ｉｔさは２０ａ１に揃えた。Next, the sintered rod 4 was inserted into the hexagonal tube 5 to obtain a composite rod 6 as shown in FIG. The size was set to 20a1.
次に、第５図に示すように、外径６７龍、内径６０ｍの
銅カプセル７中に、多数の複合棒６．６、・・・を収容
し、銅プラグ８を取り付は真空中で熔接し、密封し、複
合ビレット９を得た。Next, as shown in Fig. 5, a large number of composite rods 6, 6, ... are housed in a copper capsule 7 with an outer diameter of 67 mm and an inner diameter of 60 m, and the copper plugs 8 are attached in a vacuum. The composite billet 9 was obtained by welding and sealing.
なお、銅カブセルフの内部空洞を六角穴にしておけば、
六角形管６を稠密に挿入することが出来るが、円形穴と
し、′空隙に銅細線を詰めてもよい。In addition, if the internal cavity of the copper turnip is made into a hexagonal hole,
Although the hexagonal tubes 6 can be inserted densely, it is also possible to make the holes circular and fill the gaps with thin copper wires.
上記複合ビレット９を、６００，７００，８００．９０
０，９５０．１０００℃の各温度で、第６図に示すよう
に、ダイス角２α＝６０°、押出し速度５ｍ／ｓｅｃ
（ステム速度）で熱間静水圧押出しし、外径ＩＱｍｓ
の多芯線材１０を得た。600,700,800.90 of the above composite billet 9
At each temperature of 0,950.1000°C, as shown in Fig. 6, the die angle 2α = 60° and the extrusion speed 5 m/sec.
Hot isostatic extrusion at (stem speed), outer diameter IQms
A multifilamentary wire 10 was obtained.
その結果、６００℃と７００℃の温度のものでは外径が
不揃いで、Ｖ Ｂ、 ２ Ｃｕ ３０ｘと銅の複合比も
所望どうりではなかった。また、１０００℃の温度のも
のはくびれが発生していた。一方、８００℃、９００℃
、９５０℃の温度のものは、外径が一定であり、ＹＢａ
２Ｃｕ ３０ｘと銅の複合比も所定の値であり、良好
な多芯線材であった。As a result, the outer diameters of those heated to 600° C. and 700° C. were uneven, and the composite ratio of V B, 2 Cu 30x and copper was not as desired. In addition, constriction occurred in the case of the sample at a temperature of 1000°C. On the other hand, 800℃, 900℃
, the one with a temperature of 950°C has a constant outer diameter, and the YBa
The composite ratio of 2Cu 30x and copper was also at a predetermined value, and the wire was a good multicore wire.
なお、超電導特性は、何れの場合にも認められた。Note that superconducting properties were observed in all cases.
本発明によれば、複合酸化物系超電導体の粉末をバイン
ダーに混ぜて棒状に押出し、焼結し、焼結棒を得る工程
、上記焼結棒を金属管内に挿入し、複合棒を得る工程、
複数の上記複合棒を金属カプセル内に収容し、複合ビレ
ットを得る工程、および、上記複合とレフトを８００℃
以上９５０℃以下の温度で熱間静水圧押出しし、多芯線
材を得る工程を具備することを特徴とする複合酸化物系
超電導多芯線材の製造方法が提供され、これにより複合
酸化物系超電導体の粉末を用いた多芯線材を好適に得る
ことが出来る。特に長尺の多芯線材を得るのに有用であ
り、従来の鋼管に粉末を先議する方法では長さ３閣〜５
請が限界であるのに対し、長さ３（１＋〜５０−の長尺
の多芯線材を容易に得られるようになる。According to the present invention, a step of mixing composite oxide superconductor powder with a binder, extruding it into a rod shape, and sintering it to obtain a sintered rod; and a step of inserting the sintered rod into a metal tube to obtain a composite rod. ,
A step of accommodating a plurality of the above composite rods in a metal capsule to obtain a composite billet, and heating the above composite and left at 800°C.
There is provided a method for producing a composite oxide superconducting multicore wire, which comprises a step of hot isostatic extrusion at a temperature of 950° C. or lower to obtain a multicore wire; It is possible to suitably obtain a multi-filamentary wire using the powder. It is particularly useful for obtaining long multicore wire rods, and the conventional method of applying powder to steel pipes has a length of 3 to 5 mm.
However, it becomes possible to easily obtain a long multifilamentary wire with a length of 3 (1+ to 50-).
第１図は複合酸化物系超電導体の粉末とバインダーとを
混合した状態を示す断面図、第２図は棒状に押出しする
状態を示す断面図、第３図は焼結棒と金属管の斜視図、
第４図は複合棒の斜視図、第５図は複合ビレットの断面
図、第６図は複合ビレットを熱間静水圧押出しする状態
の断面図である。
〔符号の説明〕
ｌ・・・可塑物 ２・・・ダイス３・・・棒材
４・・・焼結棒５・・・六角形管
６・・・複合棒７・・・銅カプセル ８・・・プラ
グ９・・・複合ビレット
１０・・・多芯線材。Figure 1 is a cross-sectional view showing the mixed oxide superconductor powder and binder, Figure 2 is a cross-sectional view showing how it is extruded into a rod, and Figure 3 is a perspective view of the sintered rod and metal tube. figure,
FIG. 4 is a perspective view of the composite rod, FIG. 5 is a cross-sectional view of the composite billet, and FIG. 6 is a cross-sectional view of the composite billet in a state of hot isostatic extrusion. [Explanation of symbols] l...Plastic material 2...Dice 3...Bar material 4...Sintered rod 5...Hexagonal tube
6... Composite rod 7... Copper capsule 8... Plug 9... Composite billet 10... Multicore wire.
Claims (1)
混ぜて棒状に押出し、焼結し、焼結棒を得る工程、 （ｂ）上記焼結棒を金属管内に挿入し、複合棒を得る工
程、 （ｃ）複数の上記複合棒を金属カプセル内に収容し、複
合ビレットを得る工程、 および、 （ｄ）上記複合ビレットを８００℃以上９５０℃以下の
温度で熱間静水圧押出しし、多芯線材を得る工程 を具備することを特徴とする複合酸化物系超電導多芯線
材の製造方法。[Claims] 1. (a) A step of mixing composite oxide superconductor powder with a binder, extruding it into a rod shape, and sintering it to obtain a sintered rod; (b) Inserting the sintered rod into a metal tube. (c) accommodating the plurality of composite rods in a metal capsule to obtain a composite billet, and (d) heating the composite billet at a temperature of 800°C or higher and 950°C or lower. 1. A method for producing a composite oxide superconducting multifilamentary wire, comprising the step of isostatic extrusion to obtain a multifilamentary wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63016651A JPH01194213A (en) | 1988-01-27 | 1988-01-27 | Manufacture of complex oxide superconductive multi-core wire material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63016651A JPH01194213A (en) | 1988-01-27 | 1988-01-27 | Manufacture of complex oxide superconductive multi-core wire material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01194213A true JPH01194213A (en) | 1989-08-04 |
Family
ID=11922247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63016651A Pending JPH01194213A (en) | 1988-01-27 | 1988-01-27 | Manufacture of complex oxide superconductive multi-core wire material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01194213A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03149712A (en) * | 1989-11-02 | 1991-06-26 | Hitachi Cable Ltd | Manufacture of oxide superconductive wire material |
| WO1999028978A1 (en) * | 1997-11-26 | 1999-06-10 | Siemens Aktiengesellschaft | Method for producing an elongated supraconductor |
| JP2003086031A (en) * | 2001-09-07 | 2003-03-20 | Tokuriki Honten Co Ltd | Sheath material for superconductive material, manufacturing method therefor and superconductive wire material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS647417A (en) * | 1987-06-30 | 1989-01-11 | Nippon Steel Corp | Manufacture of superconductive wire |
-
1988
- 1988-01-27 JP JP63016651A patent/JPH01194213A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS647417A (en) * | 1987-06-30 | 1989-01-11 | Nippon Steel Corp | Manufacture of superconductive wire |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03149712A (en) * | 1989-11-02 | 1991-06-26 | Hitachi Cable Ltd | Manufacture of oxide superconductive wire material |
| WO1999028978A1 (en) * | 1997-11-26 | 1999-06-10 | Siemens Aktiengesellschaft | Method for producing an elongated supraconductor |
| JP2003086031A (en) * | 2001-09-07 | 2003-03-20 | Tokuriki Honten Co Ltd | Sheath material for superconductive material, manufacturing method therefor and superconductive wire material |
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