JP2638601B2 - Superconducting wire manufacturing method - Google Patents
Superconducting wire manufacturing methodInfo
- Publication number
- JP2638601B2 JP2638601B2 JP62236645A JP23664587A JP2638601B2 JP 2638601 B2 JP2638601 B2 JP 2638601B2 JP 62236645 A JP62236645 A JP 62236645A JP 23664587 A JP23664587 A JP 23664587A JP 2638601 B2 JP2638601 B2 JP 2638601B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- superconducting wire
- wire
- superconductor
- oxide
- 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
Links
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
Description
【発明の詳細な説明】 「産業上の利用分野」 この発明は、核磁気共鳴装置用マグネットや粒子加速
用マグネット等の超電導機器などに用いられる超電導線
の製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a superconducting wire used for a superconducting device such as a magnet for a nuclear magnetic resonance apparatus and a magnet for particle acceleration.
「従来の技術」 近来、常電導状態から超電導状態へ遷移する臨界温度
（Tc）が極めて高い値を示す酸化物系の超電導体が種々
発見されつつある。これらの超電導体は、従来の合金系
あるいは金属間化合物系超電導体に比べて臨界温度が高
く、液体窒素温度以上で超電導性を示すなど実用上極め
て有望な超電導材料とされている。[Background Art] In recent years, various oxide-based superconductors exhibiting an extremely high critical temperature (Tc) at which a transition from a normal conducting state to a superconducting state has been made are being discovered. These superconductors have a higher critical temperature than conventional alloy-based or intermetallic-compound-based superconductors, and are considered to be extremely promising in practical use, such as exhibiting superconductivity at liquid nitrogen temperature or higher.
「発明が解決しようとする問題点」 しかしながら、現在得られているこれらの酸化物系超
電導体は極めて加工性の悪い材料であり、これらに押出
加工や縮径加工を施して長尺の線材を得ようとしても、
断線等のトラブルを生じ易いため、長尺の線材を得るの
が困難であるという問題があった。"Problems to be Solved by the Invention" However, these oxide-based superconductors that are currently obtained are extremely poor in workability, and are extruded or reduced in diameter to produce long wires. Even trying to get
There is a problem that it is difficult to obtain a long wire because troubles such as disconnection are likely to occur.
この発明は上記事情に鑑みてなされたもので、その目
的とするところは、臨界温度の極めて高い酸化物系の超
電導線を長尺かつ連続的に製造し得る方法を提供するこ
とにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method capable of continuously producing a long and continuous oxide-based superconducting wire having an extremely high critical temperature.
「問題点を解決するための手段」 この発明の超電導線の製造方法では、成形ダイの内部
に高張力心線を挿通するとともに、該成形ダイの内部に
酸化物系超電導体粉末を充填し、次いで上記成形ダイ内
の酸化物系超電導体粉末に加熱処理を施して焼結体と
し、その後この焼結体の外周に金属材料を被覆すること
を上記問題点の解決手段とした。"Means for solving the problems" In the method for manufacturing a superconducting wire of the present invention, while inserting a high tension core wire inside the forming die, filling the inside of the forming die with an oxide-based superconductor powder, Then, the oxide superconductor powder in the forming die was subjected to heat treatment to form a sintered body, and thereafter, the outer periphery of the sintered body was coated with a metal material as a means for solving the above problem.
以下、この発明の超電導線の製造方法の一具体例を図
面を利用して説明する。図面は本発明の超電導線の製造
方法に適用される装置の一例を示すものである。まず、
製造方法の具体例の説明に先立ち、図面に示した製造装
置について説明する。Hereinafter, a specific example of the method for manufacturing a superconducting wire according to the present invention will be described with reference to the drawings. The drawings show an example of an apparatus applied to the method for manufacturing a superconducting wire of the present invention. First,
Prior to the description of a specific example of the manufacturing method, the manufacturing apparatus shown in the drawings will be described.
図面に示した製造装置は、高張力心線Ａを図中矢印Ｐ
方向へ走行させながら超電導線Ｂを連続的に製造するも
のであって、図中符号１は粉末供給部である。粉末供給
部１は、本体２と円筒状の供給筒３とからなり、本体２
内に配置されたスクリュー４によって超電導体粉末Ｃを
供給筒３から押し出すように構成されたものである。ま
た、供給筒３の下流側端部は、その内径が開口部へ向か
うにしたがって漸次小さくなるように形成されている。
なお、図中符号５はホッパー、６はスクリュー４を駆動
するためのモータである。The manufacturing apparatus shown in the drawing, the high tension core A is indicated by an arrow P in the drawing.
The superconducting wire B is manufactured continuously while traveling in the direction, and reference numeral 1 in the figure denotes a powder supply unit. The powder supply unit 1 includes a main body 2 and a cylindrical supply cylinder 3.
The superconductor powder C is extruded from the supply cylinder 3 by a screw 4 disposed therein. The downstream end of the supply tube 3 is formed such that its inner diameter gradually decreases as it goes toward the opening.
In the figure, reference numeral 5 denotes a hopper, and 6 denotes a motor for driving the screw 4.
上記供給筒３の先端部には、成形ダイ７が連結されて
いる。成形ダイ７は、セラミックス等からなる円筒状の
もので、その内径は供給筒３の先端部内径と同一に設定
されている。この成形ダイ７の外周側には高周波加熱機
８が配置されている。高周波加熱機８は成形ダイ７の内
部に挿通される高張力心線Ａを電磁誘導加熱し、これに
より周囲の超電導体粉末Ｃに加熱処理を施して焼結体Ｄ
とするものである。A forming die 7 is connected to the tip of the supply tube 3. The forming die 7 is a cylindrical member made of ceramics or the like, and the inner diameter thereof is set to be the same as the inner diameter of the tip portion of the supply tube 3. A high frequency heater 8 is arranged on the outer peripheral side of the forming die 7. The high-frequency heater 8 electromagnetically heats the high-tension core wire A inserted into the inside of the forming die 7, thereby performing heat treatment on the surrounding superconductor powder C to obtain a sintered body D.
It is assumed that.
また、成形ダイ７の下流側には成形機９が配置されて
いる。成形機９はリング状をなすもので、その内周部は
上流側へ向かうにしたがって漸次拡径するテーパ状に形
成されている。この成形機９は、ロール10から供給され
る金属テープ（金属材料）Ｅを内部に挿通させることに
より、金属テープＥの両側どうしが漸次接近するように
これを湾曲させ、両側端部どうしを突き合わせて円筒状
に成形するものである。Further, a molding machine 9 is disposed downstream of the molding die 7. The molding machine 9 has a ring shape, and its inner peripheral portion is formed in a tapered shape whose diameter gradually increases toward the upstream side. The molding machine 9 is configured such that a metal tape (metal material) E supplied from a roll 10 is inserted into the inside, thereby bending the metal tape E so that both sides of the metal tape E gradually approach each other, and abutting both ends. And is formed into a cylindrical shape.
さらに、成形機９の下流側には、溶接機11が配置さ
れ、この溶接機11から下流側へ向かってスエージングダ
イ12、ローラ13が順次配置されている。溶接機11は、成
形機９により円筒状に成形された金属テープＥの突き合
わせ部を接合して筒状体とするものである。また、スエ
ージングダイ12は筒状体を縮径するものであり、ローラ
13は超電導線Ｂを走行させるものである。Further, a welding machine 11 is arranged downstream of the molding machine 9, and a swaging die 12 and a roller 13 are sequentially arranged from the welding machine 11 toward the downstream. The welding machine 11 joins butted portions of the metal tape E formed into a cylindrical shape by the forming machine 9 to form a cylindrical body. The swaging die 12 is for reducing the diameter of the cylindrical body,
Reference numeral 13 denotes a member for running the superconducting wire B.
次に、本発明の超電導線の製造方法の一具体例につい
て説明する。この例では、高張力心線Ａとしてステンレ
ス線を、また金属テープＥとして銅テープを用いる。Next, a specific example of the method for manufacturing a superconducting wire of the present invention will be described. In this example, a stainless wire is used as the high tension core A, and a copper tape is used as the metal tape E.
まず、高張力心線Ａを粉末供給部１の供給筒３の上端
部から挿入して成形ダイ７内に挿通させるとともに、超
電導体粉末Ｃを粉末供給部１に充填する。ここで、超電
導体粉末Ｃとは、Ａ−Ｂ−Cu−Ｏ系（A;Sc,Y,La,Ce,Pr,
Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Luの周期律表第III
A族金属元素の一種以上、B;Be,Sr,Mg,Ba,Ca等の周期律
表第II A族元素の一種以上）あるいはＡ−Ｂ−Cu−Ｏ−
Ｘ系（X;F,Cl,Br等の周期律表第VI B族元素の一種以
上）として示される酸化物系超電導体をなす粉末とさ
れ、この酸化物系超電導体を一旦作製した後、粉砕して
粉末としたものか、あるいは該酸化物系超電導体を得る
ための材料粉末、すなわち周期律表第III A族元素を含
む粉末と周期律表第II A族元素を含む粉末と酸化銅粉末
との混合粉末を仮焼処理した後粉砕した粉末、さらには
これら両粉末を混合した粉末をいう。また、仮焼処理し
た粉末を用いる場合、個々の材料粉末の混合比について
は、後述する加熱処理が施されて超電導体となったと
き、所望する組成となるよう調整するのが望ましい。First, the high-tensile core wire A is inserted from the upper end of the supply tube 3 of the powder supply unit 1 and inserted into the forming die 7, and the superconductor powder C is filled in the powder supply unit 1. Here, the superconductor powder C is an AB-Cu-O type (A; Sc, Y, La, Ce, Pr,
Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu Periodic Table III
One or more Group A metal elements, B; one or more Group A elements of the Periodic Table II such as Be, Sr, Mg, Ba, Ca) or AB-Cu-O-
X-based (X; one or more of Group VIB elements of the periodic table such as F, Cl, Br, etc.) is a powder that constitutes an oxide-based superconductor. Powder obtained by pulverization, or material powder for obtaining the oxide-based superconductor, that is, powder containing a Group IIIA element of the Periodic Table, powder containing a Group AA element of the Periodic Table, and copper oxide A powder obtained by calcining a mixed powder with a powder and then pulverizing the powder, or a powder obtained by mixing these two powders. When a calcined powder is used, the mixing ratio of the individual material powders is desirably adjusted so as to have a desired composition when a heat treatment described later is performed to form a superconductor.
次に、スクリュー４を回転させて超電導体粉末Ｃを成
形ダイ７の内部に充填する。このとき、供給筒３の先端
内周部が先細りに形成されているため、超電導体粉末Ｃ
が供給筒３から成形ダイ７に供給される際に圧縮されて
充填密度が高められる。なお、製造作業の開始時にあっ
ては、成形ダイ７の先端開口部に栓をして超電導体粉末
Ｃが外部に放出されないようにする。次に、高周波加熱
機８により高張力心線Ａを加熱して超電導体粉末Ｃに60
0〜1100℃で１〜100時間程度加熱する加熱処理を施し、
超電導体からなる焼結体Ｄを得る。Next, the screw 4 is rotated to fill the inside of the molding die 7 with the superconductor powder C. At this time, since the inner peripheral portion of the tip of the supply tube 3 is tapered, the superconductor powder C
Is supplied to the forming die 7 from the supply tube 3 to increase the packing density. At the start of the manufacturing operation, the opening at the tip of the molding die 7 is plugged so that the superconductor powder C is not released to the outside. Next, the high-strength core wire A is heated by the high-frequency
Apply a heat treatment of heating at 0 to 1100 ° C for about 1 to 100 hours,
A sintered body D made of a superconductor is obtained.
次いで、金属テープＥを繰り出して成形機９内に挿通
し、矢印Ｐ方向へ走行させる。すると、金属テープＥは
その両側どうしが漸次接近するように湾曲し、成形機９
から出るときには両側端部どうしが突き合わせられる。
そして、溶接機11により金属テープＥの突き合わせ部を
溶接して筒状体とする。さらに、この筒状体の内部に上
記超電導体からなる焼結体Ｄを挿入し、筒状体とともに
焼結体Ｄをスエージングダイ12内に挿入する。すると、
筒状体が縮径してその内周面が焼結体Ｄの外周面に密着
し、超電導線Ｂとなる。Next, the metal tape E is fed out, inserted into the molding machine 9, and run in the arrow P direction. Then, the metal tape E curves so that both sides thereof gradually approach each other, and the molding machine 9
When exiting, both ends are butted against each other.
Then, the butted portion of the metal tape E is welded by the welding machine 11 to form a cylindrical body. Further, the sintered body D made of the superconductor is inserted into the cylindrical body, and the sintered body D is inserted into the swaging die 12 together with the cylindrical body. Then
The diameter of the cylindrical body is reduced, and the inner peripheral surface of the cylindrical body is brought into close contact with the outer peripheral surface of the sintered body D to form the superconducting wire B.
なお、この超電導線Ｂに縮径処理を施し、所望する線
径とするようにしてもよい。The superconducting wire B may be subjected to a diameter reduction process so as to have a desired wire diameter.
また、超電導線Ｂに再度加熱処理を施し、アニールを
行ってもよく、さらにこの加熱処理に際して超電導線Ｂ
を所望する形状となるように加熱を行ってもよい。The superconducting wire B may be again subjected to a heat treatment and then annealed.
May be heated so as to have a desired shape.
このようにして得られた超電導線Ｂは長尺の線材であ
り、液体窒素以上の臨界温度を示すなど良好な超電導特
性を呈するものであった。そして、上記製造方法によれ
ば、成形ダイ７内の超電導体粉末Ｃに加熱処理を連続的
に施すから、任意の線径の超電導線Ｂを極めて効率的に
製造することが可能であり、さらに、超電導体Ｄの内部
に高張力心線Ａを設け、かつ外周を金属テープＥで被覆
するから、ローラ13によって超電導線Ｂを引き出しても
超電導体からなる焼結体Ｄが切断することがなく、極め
て長尺の超電導線Ｂを製造することが可能である。The superconducting wire B thus obtained was a long wire, and exhibited good superconducting properties such as a critical temperature higher than that of liquid nitrogen. And according to the said manufacturing method, since the superconductor powder C in the shaping | die 7 is continuously heat-processed, the superconducting wire B of arbitrary wire diameters can be manufactured very efficiently, Furthermore, Since the high-strength core wire A is provided inside the superconductor D and the outer periphery is covered with the metal tape E, even if the superconducting wire B is pulled out by the roller 13, the sintered body D made of the superconductor is not cut. It is possible to manufacture an extremely long superconducting wire B.
なお、上記例においてはセラミックス製の成形ダイ７
を使用しているが、金属製のものを使用してもよく、そ
の場合には高周波加熱機８の代わりに加熱炉を用いても
よい。また、高張力心線Ａおよび金属テープＥの材質に
ついては上記のものに限るものでなく、例えば、高張力
心線Ａとしてピアノ線など、金属テープＥとして銀製、
ステンレス製のものなどを使用してもよい。In the above example, the forming die 7 made of ceramics is used.
Is used, but a metal-made one may be used. In that case, a heating furnace may be used instead of the high-frequency heater 8. The materials of the high-strength core A and the metal tape E are not limited to those described above. For example, the high-strength core A is a piano wire, the metal tape E is silver,
Stainless steel or the like may be used.
「発明の効果」 以上説明したようにこの発明の超電導線の製造方法
は、成形ダイの内部に高張力心線を挿通するとともに、
該成形ダイの内部に酸化物系超電導体粉末を充填し、次
いで上記成形ダイ内の酸化物系超電導体粉末に加熱処理
を施して焼結体とし、その後この焼結体の外周に金属材
料を被覆するので、優れた超電導特性を有する酸化物系
超電導線を、切断等のトラブルを発生することなく長尺
に、そして連続的に製造することができる。"Effects of the Invention" As described above, the method for manufacturing a superconducting wire of the present invention involves inserting a high-tensile core wire inside a forming die,
The inside of the forming die is filled with the oxide-based superconductor powder, and then the oxide-based superconductor powder in the forming die is subjected to a heat treatment to form a sintered body. Because of the coating, an oxide-based superconducting wire having excellent superconducting properties can be manufactured continuously without any trouble such as cutting.
図面は本発明の超電導線の製造方法の一例を実施するた
めの製造装置を示す概略図である。 ７……成形ダイ、８……高周波加熱機 Ａ……高張力心線、Ｂ……超電導線 Ｃ……超電導体粉末、Ｄ……焼結体 Ｅ……金属テープ（金属材料）The drawing is a schematic view showing a manufacturing apparatus for carrying out an example of the method for manufacturing a superconducting wire according to the present invention. 7: forming die, 8: high-frequency heater A: high tension core wire, B: superconducting wire C: superconductor powder, D: sintered body E: metal tape (metal material)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 丹 正之 東京都江東区木場１丁目５番１号 藤倉 電線株式会社内 (72)発明者 山之内 宏 東京都江東区木場１丁目５番１号 藤倉 電線株式会社内 (56)参考文献 特開 昭64−60921（ＪＰ，Ａ) 特開 昭63−313418（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masayuki Tan 1-5-1, Kiba, Koto-ku, Tokyo Inside Fujikura Electric Wire Co., Ltd. (72) Inventor Hiroshi Yamanouchi 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Electric Wire (56) References JP-A-64-60921 (JP, A) JP-A-63-313418 (JP, A)
Claims (1)
ともに、該成形ダイの内部に酸化物系超電導体粉末を充
填し、次いで上記成形ダイ内の酸化物系超電導体粉末に
加熱処理を施して焼結体とし、その後この焼結体の外周
に金属材料を被覆することを特徴とする超電導線の製造
方法。1. A high-tension core wire is inserted into a molding die, an oxide-based superconductor powder is filled in the molding die, and then the oxide-based superconductor powder in the molding die is heated. And producing a sintered body, and then coating the outer periphery of the sintered body with a metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62236645A JP2638601B2 (en) | 1987-09-21 | 1987-09-21 | Superconducting wire manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62236645A JP2638601B2 (en) | 1987-09-21 | 1987-09-21 | Superconducting wire manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6481126A JPS6481126A (en) | 1989-03-27 |
| JP2638601B2 true JP2638601B2 (en) | 1997-08-06 |
Family
ID=17003689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62236645A Expired - Fee Related JP2638601B2 (en) | 1987-09-21 | 1987-09-21 | Superconducting wire manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2638601B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6460921A (en) * | 1987-09-01 | 1989-03-08 | Furukawa Electric Co Ltd | Manufacture of oxide type superconductive wire |
-
1987
- 1987-09-21 JP JP62236645A patent/JP2638601B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6481126A (en) | 1989-03-27 |
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