JPH0195409A - Superconducting wire - Google Patents
Superconducting wireInfo
- Publication number
- JPH0195409A JPH0195409A JP62251037A JP25103787A JPH0195409A JP H0195409 A JPH0195409 A JP H0195409A JP 62251037 A JP62251037 A JP 62251037A JP 25103787 A JP25103787 A JP 25103787A JP H0195409 A JPH0195409 A JP H0195409A
- Authority
- JP
- Japan
- Prior art keywords
- superconductor
- metal body
- superconducting wire
- oxide
- perovskite 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 35
- 239000002887 superconductor Substances 0.000 claims abstract description 31
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 5
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 4
- 229910052689 Holmium Inorganic materials 0.000 claims abstract description 4
- 229910052765 Lutetium Inorganic materials 0.000 claims abstract description 4
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 4
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 4
- 229910052775 Thulium Inorganic materials 0.000 claims abstract description 4
- 229910052769 Ytterbium Inorganic materials 0.000 claims abstract description 4
- 229910052691 Erbium Inorganic materials 0.000 claims abstract 3
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract 3
- 229910052706 scandium Inorganic materials 0.000 claims abstract 3
- 229910052727 yttrium Inorganic materials 0.000 claims abstract 3
- 239000000126 substance Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 abstract description 4
- 229910052712 strontium Inorganic materials 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 3
- 229910052693 Europium Inorganic materials 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 239000007788 liquid Substances 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 239000010408 film Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910020012 Nb—Ti Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910003097 YBa2Cu3O7−δ Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910000657 niobium-tin Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910000999 vanadium-gallium Inorganic materials 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、超電導磁石、核融合、エネルギー蓄積、医療
用ＮＭＲ−ＣＴおよび磁石浮上列車等の分野で利用する
超電導線に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a superconducting wire used in fields such as superconducting magnets, nuclear fusion, energy storage, medical NMR-CT, and magnetically levitated trains.
従来の技術 超電導性を示す物質は非常に多く、大半の元素。Conventional technology There are many substances that exhibit superconductivity, including most elements.
合金、化合物、それに金属酸化物等を加えると数百種類
に及ぶ。このうち、高磁界を発生する超電導コイル用と
して線材化が試みられ、Ｎｂ−Ｔｉ。When alloys, compounds, and metal oxides are added, there are hundreds of types. Among these, attempts have been made to make Nb-Ti into wire for use in superconducting coils that generate high magnetic fields.
Ｎｂ３Ｓｎ、Ｖ３Ｇａ、Ｎｂ５Ａ１１’等ｃｃ ヨー）
−ｃ作製すｆｔｔ、−超電導線が実用に供されている。Nb3Sn, V3Ga, Nb5A11' etc.cc yaw)
-c-fabricated ftt, -superconducting wires are in practical use.
しかし、これらの線材は臨界温度（Ｔｃ）がそれぞれ１
０Ｋ。However, each of these wires has a critical temperature (Tc) of 1
0K.
１８．３Ｋ 、 １６．５Ｋ 、 １８．８にと非常に
低く、実際に使用する場合、高価な液体ヘリウムで冷却
する必要があった。The temperature was very low at 18.3K, 16.5K, and 18.8K, and when it was actually used, it was necessary to cool it with expensive liquid helium.
このような状況において、最近、酸化物の高温超電導体
が発見され、その臨界温度が飛躍的に上昇し、液体窒素
温度７７Ｋを越える１００Ｋ近くを示すものが現われた
。この物質は化学式ＹＢａ２Ｃｕ ３Ｏ７−δで表わさ
れることが明らかになっており、ＹをＬｕ、Ｙｂ、Ｔｍ
、Ｅｒ、Ｈａ、Ｄｙ、Ｇｄなどの希土類元素に替えても
殆ど同等の臨界温度（Ｔｃ）を示すことが確認されてい
る。その結晶構造はＣｕ○６八面体を含むペロブスカイ
ト類似構造を持ち、酸素欠損が超電導に重要な役割を果
たすことが知られているが、酸素欠損の位置、欠損量Ｃ
）に関してはいまだ完全には解明されておらず、不明な
点も多い。また、このＹＢａ２ Ｃｕ３Ｏ７−δを用い
た線材化の試みもいくつか報告されているが、いまだ特
性の安定性に問題があり、実用に十分供するまでのもの
はいまだ報告されていない。Under these circumstances, high-temperature oxide superconductors have recently been discovered, and their critical temperature has increased dramatically, with some showing a critical temperature of nearly 100K, exceeding the liquid nitrogen temperature of 77K. It has been revealed that this substance has the chemical formula YBa2Cu3O7-δ, where Y is replaced by Lu, Yb, and Tm.
It has been confirmed that almost the same critical temperature (Tc) is exhibited even when rare earth elements such as , Er, Ha, Dy, and Gd are used. Its crystal structure has a perovskite-like structure containing Cu○6 octahedrons, and it is known that oxygen vacancies play an important role in superconductivity.
) has not yet been fully elucidated, and there are many unknown points. In addition, several attempts have been made to produce wire rods using this YBa2 Cu3O7-δ, but there are still problems with the stability of the characteristics, and no wire rods have yet been reported that are suitable for practical use.
発明が解決しようとする問題点
液体窒素温度７７Ｋを越える臨界温度を示し、化学式Ｍ
Ｂａ２Ｃｕ３Ｏ７−δで示される酸化物超電導体の線材
化の試みは緒についたばかりであり、しかも酸化物超電
導体に関する線材化は従来殆ど行われていなかったため
、試作された超電導線はいまだ不安定で、十分にその特
性が引き出されていなかった。また、このＭＢａ２ Ｃ
ｕ３Ｏ７−δ型酸化物超電導体の超電導性の発現には異
方性があり、その超電導性が結晶構造のａ軸とｂ軸とで
成す平面方向にのみ出現し、この面に垂直なＣ軸方向に
は出現しないため、線材化において、超電導性の発現す
るａ−ｂ軸平面と超電導線の軸方向が一致するように作
製する必要があった。Problem to be solved by the invention The chemical formula M
Attempts to make wires from the oxide superconductor represented by Ba2Cu3O7-δ have just begun, and since there has been little work on making oxide superconductors into wires, the prototype superconducting wires are still unstable. Its characteristics were not fully brought out. Also, this MBa2 C
There is anisotropy in the expression of superconductivity of the u3O7-δ type oxide superconductor, and the superconductivity appears only in the plane direction formed by the a-axis and b-axis of the crystal structure, and the superconductivity appears only in the direction of the plane formed by the a-axis and b-axis of the crystal structure, and the superconductivity appears only in the direction of the plane formed by the a-axis and b-axis of the crystal structure, and the superconductivity appears only in the direction of the plane formed by the a-axis and b-axis of the crystal structure, and Therefore, when making a wire, it was necessary to make the superconducting wire so that the a-b axis plane where superconductivity is expressed coincides with the axial direction of the superconducting wire.
本発明は、上記のような従来の問題点を解決するもので
、超電導性の発現するａ−ｂ軸平面を超電導線の軸方向
に一致させ、安定性を改善し、その特性を向上させるこ
とができるようにした超電導線を提供することを目的と
するものである。The present invention solves the above-mentioned conventional problems by aligning the a-b axis plane where superconductivity occurs with the axial direction of the superconducting wire, improving stability and improving its characteristics. The purpose of this invention is to provide a superconducting wire that can perform the following steps.
問題点を解決するための手段
上記問題点を解決するための本発明の第１番目の技術的
な手段は、化学式ＭＢａ２ Ｃｕ３Ｏ７−δ（０＜δ〈
１）で示される超電導体の外側をＡＢＯ３型のペロブス
カイト酸化物が囲み、このペロブスカイト酸化物の外側
を金属体が囲む断面形状に形成されたものである。また
、本発明の第２番目の技術的な手段は、化学式ＭＢａ２
Ｃｕ３Ｏ７−δ（０＜δ〈１）で示される超電導体の
外側をＡＢＯ３型のペロブスカイト酸化物が囲み、この
ペロブスカイト酸化物の外側を金属が囲む断面形状を有
する超電導素体が形成され、この複数本に束ねた超電導
素体の外側を金属体が囲む断面形状に形成されたもので
ある。Means for Solving the Problems The first technical means of the present invention for solving the above problems is based on the chemical formula MBa2 Cu3O7-δ (0<δ<
A superconductor shown in 1) is surrounded by an ABO3 type perovskite oxide, and a metal body surrounds the outside of the perovskite oxide. Moreover, the second technical means of the present invention is the chemical formula MBa2
A superconducting element having a cross-sectional shape in which an ABO3 type perovskite oxide surrounds the outside of a superconductor represented by Cu3O7-δ (0 < δ < 1), and a metal surrounds the outside of this perovskite oxide is formed. It has a cross-sectional shape in which a metal body surrounds the outside of a superconducting element bundled into a book.
作 用
本発明は、上記技術的手段により次のような作用を有す
る。Effects The present invention has the following effects through the above technical means.
すなわち、Ａ Ｂ ０３５のペロブスカイト酸化物を介
在させることにより、従来線材化が困難であった酸化物
超電導体、特に化学式ＭＢａ２Ｃｕ３ｏ７−δで示され
る酸化物超電導体を用い、その超電導性の発現するａ−
ｂ軸平面を軸方向に一致させて容易に線材化することが
できる。That is, by interposing the perovskite oxide of A B 035, an oxide superconductor, which has conventionally been difficult to make into a wire, especially an oxide superconductor represented by the chemical formula MBa2Cu3o7-δ, can be used to develop its superconductivity. −
By aligning the b-axis plane with the axial direction, it can be easily made into a wire rod.
実施例
以下、本発明の実施例について図面を参照しながら詳細
に説明する。EXAMPLES Hereinafter, examples of the present invention will be described in detail with reference to the drawings.
まず、本発明の第１の実施例について説明する。First, a first embodiment of the present invention will be described.
第１図および第２図は本発明の第１の実施例における超
電導線を示し、第１図は横断面図、第２図は作製途中の
一部斜視図である。FIGS. 1 and 2 show a superconducting wire according to a first embodiment of the present invention, with FIG. 1 being a cross-sectional view and FIG. 2 being a partial perspective view during manufacture.
第１図に示すように本実施例の超電導線１は化学式ＭＢ
ａ２ Ｃｕ３Ｏ７−δ（０＜δく１）で示される組成の
物質からなる酸化物超電導体２の外周をＡＢＯ３型のペ
ロブスカイト酸化物ａが囲み、このペロブスカイト酸化
物３の外周を金属体４が囲む断面形状に形成され、線材
化されている。As shown in FIG. 1, the superconducting wire 1 of this embodiment has the chemical formula MB.
ABO3 type perovskite oxide a surrounds the outer periphery of an oxide superconductor 2 made of a substance with a composition represented by a2 Cu3O7-δ (0<δ×1), and a metal body 4 surrounds the outer periphery of this perovskite oxide 3. It is formed into a cross-sectional shape and made into a wire rod.
次に本実施例の超電導線１の作製方法について説明する
。Next, a method for manufacturing the superconducting wire 1 of this example will be explained.
まず、第２図に示すように、例えばＣｕ、若しくはＡｇ
からなる平板状の金属体４上にＡ Ｂ ｏ３型ペロブス
カイト酸化物３をスパッタ法によって形成り、た。この
Ａ Ｂ ｏ３型ペロブスカイト酸化物３はＡがＬａ 、
Ｐｒ 、Ｎｄ 、Ｓｍ 、Ｇｄ 、Ｄｙ 、Ｈｏ 、Ｅ
ｒの少なくとも１種か、もしくはこれらの一部がＣａ。First, as shown in FIG. 2, for example, Cu or Ag
A Bo3 type perovskite oxide 3 was formed by sputtering on a flat metal body 4 consisting of the following. In this A Bo3 type perovskite oxide 3, A is La,
Pr, Nd, Sm, Gd, Dy, Ho, E
At least one kind of r or a part thereof is Ca.
Ｓｒ、Ｂａの少なくとも１種で置換されたもの、ＢがＭ
ｎ、Ｆｅ、Ｃｏ、Ｔｉの少なくとも１種で構成された場
合、その結晶系は立方晶系か、正方晶系に属し、その格
子定数は３．８０λから３．９０λの間の値となる。例
えばＬ ａ Ｏ，５Ｓｒ ０．５Ｃｏ０３ は立方晶に
属し、ａ ＝ ３．８３λであり、これらはＭＢａ２Ｃ
ｕ３Ｏ７−δ型の酸化物超電導体２のａ軸、あるいはｂ
軸の格子定数にほぼ一致したもので、例えば、Ｙ Ｂａ
２ Ｃｕ３Ｏ７−δはａ ＝ ３．８２λ、ｂ−３，８
９λ、Ｓｍ１１．６８λであり、上記ペロブスカイト酸
化物３の上に酸化物超電導体２を形成すると、Ｃ軸方向
に成長した酸化物超電導体２が得やすく、特に配向した
ペロブスカイト酸化物２の上では非常に容易にＣ軸配向
をさせることができる。Substituted with at least one of Sr and Ba, B is M
When it is composed of at least one of n, Fe, Co, and Ti, its crystal system belongs to a cubic system or a tetragonal system, and its lattice constant has a value between 3.80λ and 3.90λ. For example, L a O,5Sr 0.5Co03 belongs to the cubic crystal, a = 3.83λ, and these are MBa2C
The a-axis or b of the u3O7-δ type oxide superconductor 2
It almost matches the lattice constant of the axis, for example, Y Ba
2 Cu3O7-δ is a = 3.82λ, b-3,8
9λ, Sm 11.68λ, and when the oxide superconductor 2 is formed on the perovskite oxide 3, it is easy to obtain the oxide superconductor 2 grown in the C-axis direction, especially on the oriented perovskite oxide 2. C-axis orientation can be achieved very easily.
上記Ａ Ｂ ０３型ベロプヌカイト酸化物３のスパッタ
条件として、例えばＬａ０．５Ｓｒ０．５Ｃｏ○３の場
合、基板温度３Ｏ０°Ｃ〜２ Ｘ １０ ’ｔｏｒ ｒ
、Ａｒ ：０２比３：１．入力電力４００Ｗで基板で
ある金属体４上にスパッタを行って（１００）配向した
ペロブスカイト酸化物３の膜を得た。この薄膜は、入力
電力を増すに伴い、アモルファス状から（１１０）配向
膜、（１１０）と′（１００）の混合膜、（１００）配
向膜と変化する。また配向膜条件としては、ガス圧、基
板温度の要因もあり、その（１００）配向膜形成範囲は
それぞれ１０−〜１０ ’ ｔｏｒｒ、２００〜６
００°Ｃの間である。For example, in the case of La0.5Sr0.5Co○3, the sputtering conditions for the A B 03 type belopnukite oxide 3 are as follows: the substrate temperature is 300°C to 2 x 10'torr;
, Ar:02 ratio 3:1. Sputtering was performed on the metal body 4 as a substrate with an input power of 400 W to obtain a film of (100) oriented perovskite oxide 3. As the input power increases, this thin film changes from an amorphous state to a (110) oriented film, a mixed film of (110) and '(100), and a (100) oriented film. In addition, the alignment film conditions include gas pressure and substrate temperature, and the (100) alignment film formation ranges are 10-10' torr and 200-6 torr, respectively.
00°C.
上記のようにペロブスカイト酸化物３を形成した平板状
の金属体４をペロブスカイト酸化物３の面を内側にして
、長尺端側が軸方向に沿うようにして管状にし、長尺端
同志を溶接することにより、管状体を形成した。そして
、この管状体の中空部に、９００〜１０００°Ｃで仮焼
し、粉砕したＭＢａ２Ｃｕ３Ｏ７−δの粉末を充填し、
管状体の両端を密封した後、これを減面加工してｌ １
ｍｍの線材とし、その後８００〜１０００°Ｃで熱処
理を行い、第１図に示す断面形状の超電導線１を作製し
た。この超電導線１を液体窒素によって冷却した結果、
９４にで抵抗の低下が始まり、８７にで抵抗０となった
。そして、液体窒素温度７７にでの電流密度、６００
Ａ ／ Ｓｍ２を得た。The flat metal body 4 on which perovskite oxide 3 is formed as described above is made into a tube shape with the surface of perovskite oxide 3 facing inside and the long end side along the axial direction, and the long ends are welded together. A tubular body was thereby formed. Then, the hollow part of this tubular body is filled with MBa2Cu3O7-δ powder that has been calcined at 900 to 1000°C and crushed.
After sealing both ends of the tubular body, it is processed to reduce its surface area.
mm wire, and then heat-treated at 800 to 1000°C to produce a superconducting wire 1 having the cross-sectional shape shown in FIG. As a result of cooling this superconducting wire 1 with liquid nitrogen,
The resistance started to decrease at 94, and reached 0 at 87. And the current density at liquid nitrogen temperature of 77, 600
A/Sm2 was obtained.
次に本発明の第２の実施例について説明する。Next, a second embodiment of the present invention will be described.
第３図は本発明の第２の実施例を示す横断面図である。FIG. 3 is a cross-sectional view showing a second embodiment of the invention.
第３図に示すように本実施例の超電導線１は化学式Ｍ
Ｂａ２ Ｃｕ３Ｏ７−δ（０＜δ〈１）で示される組成
の物質からなる超電導体２の外周をＡＢＯ３型のペロブ
スカイト酸化物３が囲み、このペロブスカイト酸化物３
の外周を金属体４が囲み、超電導体２がその内周に金属
体５を有する断面形状に形成され、線材化されている。As shown in FIG. 3, the superconducting wire 1 of this embodiment has the chemical formula M
An ABO3 type perovskite oxide 3 surrounds the outer periphery of a superconductor 2 made of a substance having a composition represented by Ba2Cu3O7-δ (0<δ<1), and this perovskite oxide 3
The outer periphery of the superconductor 2 is surrounded by a metal body 4, and the superconductor 2 is formed into a cross-sectional shape having a metal body 5 on its inner periphery, and is made into a wire.
次に本実施例の超電導線１の作製方法について説明する
。Next, a method for manufacturing the superconducting wire 1 of this example will be explained.
まず、金属体４の内壁にペロブスカイト酸化物３を上記
第１の実施例の場合と同様に形成するか、あるいはペロ
ブスカイト酸化物３の溶融物を管状の金属体４に流し込
むことにより、内壁部にペロブスカイト酸化物１２の薄
膜層を形成した。次に、上記管状体の中心に金属体５を
配置し、金属体５とペロブスカイト酸化物３との間に、
９００〜１０００’Ｃで仮焼し、粉砕したＭ Ｂａ ２
Ｃｕ３Ｏ７−δの粉末を充填し、管状体の両端を密封
した。First, a perovskite oxide 3 is formed on the inner wall of the metal body 4 in the same manner as in the first embodiment, or a melt of the perovskite oxide 3 is poured into the tubular metal body 4. A thin film layer of perovskite oxide 12 was formed. Next, a metal body 5 is placed in the center of the tubular body, and between the metal body 5 and the perovskite oxide 3,
M Ba 2 calcined at 900-1000'C and crushed
The tubular body was filled with powder of Cu3O7-δ and both ends of the tubular body were sealed.
そして、減面加工を施し、線材化して８００〜１０００
°Ｃで熱処理を行い、超電２ｇｍ１を作製した。この超
電導線１を液体窒素によって冷却した結果、上記第１の
実施例と同様の特性が得られた。Then, it is processed to reduce the area and made into a wire rod with a diameter of 800 to 1000.
Heat treatment was performed at °C to produce superelectric 2gm1. As a result of cooling this superconducting wire 1 with liquid nitrogen, characteristics similar to those of the first example were obtained.
次に本発明の第３の実施例について説明する。Next, a third embodiment of the present invention will be described.
第４図は本発明の第３の実施例を示す横断面図である。FIG. 4 is a cross-sectional view showing a third embodiment of the present invention.
第４図に示すように本実施例の超電導線１は化学式ＭＢ
ａ２Ｃｕ３Ｏ７−δで示される組成の物質からなる超電
導体２の外周をＡＢＯ３型のペロブスカイト酸化物３が
囲み、このペロブヌカイト酸化物３の外周を金属体４が
囲み、超電導体２がその内周に金属体５と、この金属体
５を囲むＡＢ Ｏ３型ベロゲスカイト酸化物６とを有す
る断面形状に形成され、線材化されている。As shown in FIG. 4, the superconducting wire 1 of this embodiment has the chemical formula MB.
ABO3 type perovskite oxide 3 surrounds the outer periphery of superconductor 2 made of a substance with a composition represented by a2Cu3O7-δ, a metal body 4 surrounds the outer periphery of this perovnukite oxide 3, and superconductor 2 has metal on its inner periphery. The metal body 5 is formed into a cross-sectional shape having an AB O3 type vergeskite oxide 6 surrounding the metal body 5, and is made into a wire.
次に本実施例の超電導線１の炸裂方法について説明する
。Next, a method of exploding the superconducting wire 1 of this embodiment will be explained.
まず、金属体４の内壁にペロブスカイト酸化物３を上記
第１．第２の実施例の場合と同様に形成した。次に金属
体５の周囲にスパッタ法によりベロゲスカイト酸化物６
を形成するか、あるいはベロゲスカイト酸化物溶融液中
に金属体５を浸すことにより、金属体５の外周にペロブ
スカイト酸化物６を形成した。そして、金属体４とその
内周のベロゲスカイト酸化物３とからなる管状体の中心
にベロゲスカイト酸化物６を外周に形成した金属体５を
配置し、ペロブスカイト酸化物ａと６の間に、９００〜
１０００°Ｃで仮焼し、粉砕したＭＢａ２ Ｃｕ３Ｏ７
−δの粉末を充填し、管状体の両端を密封して減面加工
を施した。そして、線材化したものを８００〜１０００
°Ｃで熱処理を行って超電導線１を作製した。この超電
導線１を液体窒素によって冷却した結果、９３にで抵抗
の低下が見られ、８８にで抵抗０となった。そして、液
体窒素温度、７７にでの電流密度、１０００ Ａ／ｃｍ
２と良好な結果を得た。First, the perovskite oxide 3 is placed on the inner wall of the metal body 4 as described above. It was formed in the same manner as in the second example. Next, a vergeskite oxide 6 is applied around the metal body 5 by sputtering.
A perovskite oxide 6 was formed on the outer periphery of the metal body 5 by forming a perovskite oxide or by immersing the metal body 5 in a velgeskite oxide melt. Then, a metal body 5 having a vergeskite oxide 6 formed on its outer periphery is placed in the center of a tubular body consisting of a metal body 4 and a vergeskite oxide 3 on its inner periphery.
MBa2 Cu3O7 calcined at 1000°C and crushed
-δ powder was filled, both ends of the tubular body were sealed, and surface reduction processing was performed. Then, 800 to 1000 wire rods are made.
Superconducting wire 1 was produced by heat treatment at °C. As a result of cooling this superconducting wire 1 with liquid nitrogen, a decrease in resistance was observed at 93, and the resistance became 0 at 88. and liquid nitrogen temperature, current density at 77, 1000 A/cm
A good result of 2 was obtained.
次に本発明の第４の実施例について説明する。Next, a fourth embodiment of the present invention will be described.
第５図は本発明の第４の実施例を示す横断面図である。FIG. 5 is a cross-sectional view showing a fourth embodiment of the present invention.
第５図に示すように本実施例の超電導線１は上記第１〜
第３の実施例に示すように作製し、減面加工を施す前の
状態の超電導素体１１（図示例は第１の実施例のもの）
を複数本（図示例では７本）束ね、これらの外側を金属
体１２により囲み、この全体に減面加工を施し、８００
〜１０００°Ｃで熱処理を行うことにより、複合化した
超電導線１を作製した。この複合超電導線１を液体窒素
によって冷却した結果、９４にで抵抗の低下が見られ、
８８にで抵抗０となった。そして、液体窒素温度、７７
にでの電流密度、９００Ａ／ｃｍ２を得た。As shown in FIG. 5, the superconducting wire 1 of this embodiment is
Superconducting element 11 manufactured as shown in the third embodiment and before surface reduction processing (the illustrated example is that of the first embodiment)
A plurality of (7 in the illustrated example) are bundled, their outsides are surrounded by a metal body 12, and the entire surface is subjected to surface reduction processing,
Composite superconducting wire 1 was produced by performing heat treatment at ~1000°C. As a result of cooling this composite superconducting wire 1 with liquid nitrogen, a decrease in resistance was observed at 94.
At 88, the resistance became 0. and liquid nitrogen temperature, 77
A current density of 900 A/cm2 was obtained.
発明の効果
以上述べたように本発明によれば、化学式ＭＢａ２ Ｃ
ｕ３Ｏ７−δ（０＜δ＜１）で示される酸化物超電導体
に隣接してＡ Ｂ ０３型のベロゲスカイト酸化物を介
在させているので、従来、線材化が困難であったＭＢａ
２ Ｃｕ３Ｏ７−δ型酸化物超電導体を用い、その超電
導性の発現するａ−ｂ軸平面を軸方向に一致させて容易
に線材化することができ、したがって安定性を改善し、
その特性を向上させることができる。Effects of the Invention As described above, according to the present invention, the chemical formula MBa2C
Since A B 03 type vergeskite oxide is interposed adjacent to the oxide superconductor represented by u3O7-δ (0<δ<1), MBa, which has conventionally been difficult to make into a wire,
2. Using a Cu3O7-δ type oxide superconductor, the a-b axis plane where its superconductivity is expressed can be aligned with the axial direction, and it can be easily made into a wire, thus improving stability,
Its characteristics can be improved.
第１図および第２図は本発明の第１の実施例における超
電導線を示し、第１図は横断面図、第２図は作成途中の
一部斜視図、第３図は本発明の第２の実施例を示す横断
面図、第４図は本発明の第３の実施例を示す横断面図、
第５図は本発明の第４の実施例を示す横断面図である。
１・・・・・・超電導線、２・・・・・・超電導体、３
・・・・・・ペロブスカイト酸化物、４・・・・・・金
属体、５・・・・・・金属体、６・・・・・・ペロブス
カイト酸化物、１１・・・・・・超電導素体、１２・・
・・・・金属体。
第１図
第 ２ 図1 and 2 show a superconducting wire according to a first embodiment of the present invention, with FIG. 1 being a cross-sectional view, FIG. FIG. 4 is a cross-sectional view showing the third embodiment of the present invention,
FIG. 5 is a cross-sectional view showing a fourth embodiment of the present invention. 1...Superconducting wire, 2...Superconductor, 3
... Perovskite oxide, 4 ... Metal body, 5 ... Metal body, 6 ... Perovskite oxide, 11 ... Superconducting element Body, 12...
...Metal body. Figure 1 Figure 2
Claims (6)
δ＜１）で示される超電導体の外側をＡＢＯ＿３型のペ
ロブスカイト酸化物が囲み、このペロブスカイト酸化物
の外側を金属体が囲む断面形状を有することを特徴とす
る超電導線。(1) Chemical formula MBa_2Cu_3O_7_-_δ(0<
A superconducting wire characterized in that it has a cross-sectional shape in which an ABO_3 type perovskite oxide surrounds the outside of a superconductor represented by δ<1), and a metal body surrounds the outside of the perovskite oxide.
とする特許請求の範囲第１項記載の超電導線。(2) The superconducting wire according to claim 1, wherein the superconductor has a metal body inside thereof.
周を囲んだＡＢＯ＿３型のペロブスカイト酸化物とを有
することを特徴とする特許請求の範囲第１項記載の超電
導線。(3) The superconducting wire according to claim 1, wherein the superconductor has a metal body therein and an ABO_3 type perovskite oxide surrounding the outer periphery of the metal body.
＿δで示され、ＭがＹ、Ｌａ、Ｎｄ、Ｐｍ、Ｓｍ、Ｅｕ
、Ｇｄ、Ｄｙ、Ｈｏ、Ｅｒ、Ｔｍ、Ｙｂ、Ｌｕ、Ｓｃ、
Ｓｒのうち、少なくとも１種類であることを特徴とする
特許請求の範囲第１項ないし第３項のいずれかに記載の
超電導線。(4) The chemical formula of superconductor is MBa_2Cu_3O_7_-
_δ, M is Y, La, Nd, Pm, Sm, Eu
, Gd, Dy, Ho, Er, Tm, Yb, Lu, Sc,
The superconducting wire according to any one of claims 1 to 3, characterized in that it is at least one type of Sr.
δ＜１）で示される超電導体の外側をＡＢＯ＿３型のペ
ロブスカイト酸化物が囲み、このペロブスカイト酸化物
の外側を金属体が囲む断面形状を有する超電導素体が形
成され、この複数本に束ねた超電導素体の外側を金属体
が囲む断面形状を有することを特徴とする超電導線。(5) Chemical formula MBa_2Cu_3O_7_-_δ(0<
A superconducting element having a cross-sectional shape in which an ABO_3 type perovskite oxide surrounds the outside of the superconductor represented by δ < 1) and a metal body surrounds the outside of this perovskite oxide is formed, and the superconducting element bundled into multiple pieces A superconducting wire characterized in that it has a cross-sectional shape in which a metal body surrounds the outside of an element body.
＿δで示された、ＭがＹ、Ｌａ、Ｎｄ、Ｐｍ、Ｓｍ、Ｅ
ｕ、Ｇｄ、Ｄｙ、Ｈｏ、Ｅｒ、Ｔｍ、Ｙｂ、Ｌｕ、Ｓｃ
、Ｓｒのうち、少なくとも１種類であることを特徴とす
る特許請求の範囲第５項記載の超電導線。(6) Superconductor has chemical formula MBa_2Cu_3O_7_-
M is Y, La, Nd, Pm, Sm, E, denoted by _δ
u, Gd, Dy, Ho, Er, Tm, Yb, Lu, Sc
, Sr, the superconducting wire according to claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62251037A JPH0195409A (en) | 1987-10-05 | 1987-10-05 | Superconducting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62251037A JPH0195409A (en) | 1987-10-05 | 1987-10-05 | Superconducting wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0195409A true JPH0195409A (en) | 1989-04-13 |
Family
ID=17216676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62251037A Pending JPH0195409A (en) | 1987-10-05 | 1987-10-05 | Superconducting wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0195409A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7162287B2 (en) | 2000-08-29 | 2007-01-09 | Sumitomo Electric Industries, Ltd. | Oxide high-temperature superconducting wire and method of producing the same |
| JP4709455B2 (en) * | 1999-11-08 | 2011-06-22 | 住友電気工業株式会社 | Oxide high-temperature superconducting wire and manufacturing method |
-
1987
- 1987-10-05 JP JP62251037A patent/JPH0195409A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4709455B2 (en) * | 1999-11-08 | 2011-06-22 | 住友電気工業株式会社 | Oxide high-temperature superconducting wire and manufacturing method |
| US7162287B2 (en) | 2000-08-29 | 2007-01-09 | Sumitomo Electric Industries, Ltd. | Oxide high-temperature superconducting wire and method of producing the same |
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