JPS63298921A - Manufacture of superconductive wire material - Google Patents
Manufacture of superconductive wire materialInfo
- Publication number
- JPS63298921A JPS63298921A JP62133145A JP13314587A JPS63298921A JP S63298921 A JPS63298921 A JP S63298921A JP 62133145 A JP62133145 A JP 62133145A JP 13314587 A JP13314587 A JP 13314587A JP S63298921 A JPS63298921 A JP S63298921A
- Authority
- JP
- Japan
- Prior art keywords
- oxide superconductor
- superconducting wire
- wire
- manufacturing
- elements
- 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 description 18
- 239000000463 material Substances 0.000 title claims description 5
- 239000002887 superconductor Substances 0.000 claims abstract description 44
- 150000003839 salts Chemical class 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 36
- 239000002184 metal Substances 0.000 claims description 36
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 16
- 229910002651 NO3 Inorganic materials 0.000 claims description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 3
- 229910052693 Europium Inorganic materials 0.000 claims description 3
- 229910052706 scandium Inorganic materials 0.000 claims description 3
- 229910052691 Erbium Inorganic materials 0.000 claims description 2
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 229910052772 Samarium Inorganic materials 0.000 claims description 2
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 2
- 229910052765 Lutetium Inorganic materials 0.000 claims 1
- 229910052775 Thulium Inorganic materials 0.000 claims 1
- 229910009203 Y-Ba-Cu-O Inorganic materials 0.000 claims 1
- 125000005843 halogen group Chemical group 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000012528 membrane Substances 0.000 abstract 5
- 239000000243 solution Substances 0.000 description 11
- 238000005979 thermal decomposition reaction Methods 0.000 description 4
- 206010040844 Skin exfoliation Diseases 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000007740 vapor deposition 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
- Chemically Coating (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の１］的］
（産業上の利用分野）
本発明は、ペロブスカイト型の酸化物超電導体被膜を用
いた超電導線材の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention 1] (Industrial Application Field) The present invention relates to a method for manufacturing a superconducting wire using a perovskite-type oxide superconductor coating.
（従来の技術）
近年、Ｂａ−Ｌａ−Ｃ０−０系の層状ペロブスカイト型
の酸化物が高い臨界温度を有する可能性のあることが発
表されて以来、各所で酸化物超電導体の研究が行われテ
ィる（Ｚ、Ｐｈｙｓ、Ｂ Ｃｏｎｄｅｎｓｅｄ Ｍａｔ
ｔｅｒ６４、１８９−１９３（１９８６））。その中で
もＹ−Ｂａ−Ｃｕ−０系で代表される酸素欠陥を有する
欠陥ペロブスカイト型（ＡＢａ２Ｃｕ３０□−δ型（δ
は酸素欠陥を表わし通常は１以下の数、Ａは、Ｙ、 Ｙ
ｂ、 ｔｌｏ、 Ｄｙ、 Ｅｕ、 ［ｒ、 １ｍおよび
１．ｕから選ばれた元素）の酸化物超電導体は、臨界温
度■ が９０に以上と液体窒素以、ヒの高い温度を示す
ため、非常に有望な月利として注目されている（Ｐｈｙ
ｓ、Ｒｅｖ、Ｌｅｔｔ、ｖｏｌ、 ５８ Ｎｏ、９．９
０８−９１０） 。(Prior Art) In recent years, since it was announced that Ba-La-C0-0 layered perovskite oxides may have a high critical temperature, research on oxide superconductors has been carried out in various places. Tiru (Z, Phys, B Condensed Mat
ter64, 189-193 (1986)). Among them, defective perovskite type (ABa2Cu30□-δ type (δ
represents an oxygen defect and is usually a number of 1 or less, A is Y, Y
b, tlo, Dy, Eu, [r, 1m and 1. Oxide superconductors (elements selected from
s, Rev, Lett, vol, 58 No, 9.9
08-910).
このような酸化物超電導体を、例えば導線として使用す
る場合には、金属管に封入して線材化したり、金属線上
に被膜をパターン状に形成して使用することが考えられ
る。When such an oxide superconductor is used, for example, as a conductive wire, it may be sealed in a metal tube and made into a wire, or it may be used by forming a coating on the metal wire in a pattern.
（発明が解決しようとする問題点）
ところで、上述した酸化物超電導体の使用方法のうち、
金属線上に酸化物超電導体からなる被膜を形成して使用
する方法では、蒸着法ヤスバッタリング法により被膜を
形成することが考えられるが真空装置等の特別の装置を
必要とし、製造コストが高くなるという難点がある。(Problems to be solved by the invention) By the way, among the methods of using the oxide superconductor mentioned above,
In the method of forming and using a film made of oxide superconductor on a metal wire, it is possible to form the film by vapor deposition method or Yasbuttering method, but this requires special equipment such as a vacuum device and the manufacturing cost is high. There is a problem with that.
また、前述した酸化物超電導体は、線膨脹係数が１６Ｘ
１０−’／Ｋと、通常の金属のそれに比べて１桁程度大
きいため、臨界温度までの冷熱サイクルを繰り返した場
合、金属線上から剥離してしまうおそれがあり、密着性
に乏しいという難点もある。Furthermore, the aforementioned oxide superconductor has a linear expansion coefficient of 16X.
10-'/K, which is about an order of magnitude higher than that of ordinary metals, so if repeated heating and cooling cycles up to the critical temperature are carried out, there is a risk of it peeling off from the metal wire, and there is also the problem of poor adhesion. .
本発明はこのような従来の難点を解消すべくなされたも
ので、金属線上へのペロブスカイト型酸化物超電導体被
膜の形成が容易で、かつ得られる被膜の膜厚および組成
が均一で、冷熱サイクルによっても被膜剥離のおそれの
ない超・：１導線材を製造する方法を提供することを目
的とする。The present invention has been made to solve these conventional difficulties, and it is easy to form a perovskite oxide superconductor film on a metal wire, and the resulting film has a uniform thickness and composition, and is suitable for heating and cooling cycles. It is an object of the present invention to provide a method for manufacturing a super-1 conductive wire material without fear of film peeling even when the film is peeled off.
［発明の構成］
（問題点を解決するための手段）
本発明の超電導線材の製造方法は、金属線上にペロブス
カイト型の酸化物超電導体の被膜を形成してなる超電導
線材を製造するにあたり、前記酸化物超電導体を構成す
る各元素の金属塩を所定の比率で含有する溶液を、前記
金属線上に塗布し、この塗膜を加熱することにより眞記
各元素の金属塩を熱分解し、次いで、酸素含有雰囲気中
で１００℃〜１０００℃の温度で熱処理して前記酸化物
超電導体の被膜を形成することを特徴としている。[Structure of the Invention] (Means for Solving the Problems) The method for manufacturing a superconducting wire of the present invention includes the steps described above in manufacturing a superconducting wire formed by forming a film of a perovskite-type oxide superconductor on a metal wire. A solution containing metal salts of each element constituting the oxide superconductor in a predetermined ratio is applied onto the metal wire, the coating film is heated to thermally decompose the metal salts of each element, and then The method is characterized in that the film of the oxide superconductor is formed by heat treatment at a temperature of 100° C. to 1000° C. in an oxygen-containing atmosphere.
本発明における酸化物超電導体は、希土類元素を含有し
ベロアスカイト型構造を有する酸化物超電導体であって
、超電導状態を実現できればよく、へＢａ２Ｃｕ３０□
−δ系（δは酸素欠陥を表し通常１以下、Ａは、Ｙ、
Ｓｃ、 Ｎｄ、 Ｇｄ、 Ｓｍ、 Ｙｂ、 Ｌａ、 Ｎ
ｏ、 Ｄｙ、 Ｅｕ、 Ｅｒ。The oxide superconductor in the present invention is an oxide superconductor that contains a rare earth element and has a velorskite structure, and can realize a superconducting state.
-δ system (δ represents oxygen defect and is usually 1 or less, A is Y,
Sc, Nd, Gd, Sm, Yb, La, N
o, Dy, Eu, Er.
丁ｍおよびＬｕから選ばれた元素；８８の−・部はｓｒ
等の他のアルカリ土類金属元素で置換可能）等の酸素欠
陥を有する欠陥ぺ１１ブスカイト型、５ｒ−Ｌａ−Ｃｕ
−０系等の層状ペロブスカイト型等の広義にペロブスカ
イト構造を右する酸化物とする。また希土類元素も広義
の定義とし、Ｓｃ、Ｙおよびランタン系をａむものとす
る。代表的な系としてＹ−Ｂａ−Ｃｕ−０系のほかに、
５ｃ−Ｂａ−Ｃｕ−０系、５ｒ−Ｌａ−Ｃｕ−０系、さ
らにＳｒをＢａ、Ｃａで置換した系等が挙げられる。ベ
ロアスカイト型酸化物超電導体を構成する元素は、基本
的に化学量論比の組成となるように混合するが、多少製
造条件等との関係等でずれていても構わない。例えばＹ
−Ｂａ−Ｃｕ−０系ではＹ １ｍｏｌに対しＢａ ２ｍ
ｏｌ 、 Ｃｕ ３ｍｏｌが標準組成であるが、実用上
はＹｏ、６〜１．４ ｍｏ１％、Ｂａ １．５〜３．
０ ｌｌｌｏｌ％、Ｃｕ２．０〜４．０ ｍｏ１％程度
のずれは問題ない。Element selected from Dingm and Lu; - part of 88 is sr
5r-La-Cu
It is an oxide having a perovskite structure in a broad sense, such as a layered perovskite type such as -0 type. Rare earth elements are also broadly defined to include Sc, Y, and lanthanum-based elements. In addition to the Y-Ba-Cu-0 system as a representative system,
Examples include 5c-Ba-Cu-0 system, 5r-La-Cu-0 system, and systems in which Sr is replaced with Ba or Ca. The elements constituting the velorskite-type oxide superconductor are basically mixed so as to have a stoichiometric composition, but there may be a slight deviation depending on the manufacturing conditions, etc. For example, Y
-Ba-Cu-0 system: 2m of Ba per 1mol of Y
The standard composition is 3 mol of Yo, 6 to 1.4 mol of Cu, and 1.5 to 3 mol of Ba.
A deviation of about 0 llol% and Cu2.0 to 4.0 mo1% is not a problem.
本発明の超電導線材の製造方法についてさらに詳述する
と、まず上述した酸化物超電導体を構成する各元素の金
属塩を所定の比率で含有Ｊる水溶液または有機溶液を作
製する。この溶液に使用づる金属塩としては、容易に熱
分解可能なハロゲン化物や硝酸塩等が好ましい。この溶
液は、例えばＹ−Ｂａ−Ｃｕ−０系の酸化物超電導体で
あれば、これらの元素を含む各金属塩をこれらの元素量
として面述した一般式に対して化学量論比の組成となる
ように水またはアルコールのような有機溶剤に溶解する
ことにより得られる。To explain in more detail the method for manufacturing the superconducting wire of the present invention, first, an aqueous solution or an organic solution containing metal salts of each element constituting the above-mentioned oxide superconductor in a predetermined ratio is prepared. The metal salt used in this solution is preferably a halide or nitrate that can be easily thermally decomposed. For example, in the case of a Y-Ba-Cu-0 based oxide superconductor, this solution has a composition in a stoichiometric ratio with respect to a general formula in which each metal salt containing these elements is listed as the amount of these elements. It can be obtained by dissolving it in water or an organic solvent such as alcohol.
次いで、このようにして作製した各金属塩を含む溶液を
金属線上に塗布する。この金属線としては、線膨脹係数
が５Ｘ１０−６／Ｋ〜２５Ｘ １０−’ ／Ｋのものが
好ましい。金属線の線ｆｌｒ！Ａ係数が５Ｘ１０−６／
Ｋ〜２５Ｘ １０−６／Ｋの範囲外になると酸化物超電
導体との線膨脹係数の差が大きくなりすぎ、被膜が金属
線から剥離し易くなる。Next, a solution containing each of the metal salts prepared in this manner is applied onto the metal wire. The metal wire preferably has a linear expansion coefficient of 5X10-6/K to 25X10-'/K. Metal wire line flr! A coefficient is 5X10-6/
If it is outside the range of K to 25X 10-6/K, the difference in linear expansion coefficient with the oxide superconductor will become too large, and the coating will easily peel off from the metal wire.
このような金属線の素材としては、例えば、Ａ（］（線
膨脹係数１９．３Ｘ １０−’ ／Ｋ）があげられる。An example of the material for such a metal wire is A(] (linear expansion coefficient: 19.3X 10-' /K).
次に、このようにして形成した被膜を加熱することによ
り熱分解し、酸化物超電導体を構成する各元素の酸化物
を形成する。この熱分解は、例えば被膜を形成した金属
線をホットプレートのような間接加熱器上で加熱するこ
とにより行うことができる。また、予め所定の温度に加
熱した金属線上に前述した各元素の金属塩を含む溶液を
直接塗布することによっても同様に行える。Next, the film thus formed is thermally decomposed by heating to form oxides of each element constituting the oxide superconductor. This thermal decomposition can be performed, for example, by heating the coated metal wire on an indirect heater such as a hot plate. Alternatively, the same method can be performed by directly applying a solution containing the metal salts of the aforementioned elements onto a metal wire that has been heated to a predetermined temperature in advance.
そして、前述した各元素の金属塩を含む溶液の塗布と熱
分解とを、必要に応じて繰返し行い所望の膜厚にする。Then, the application of the solution containing the metal salt of each element described above and the thermal decomposition are repeated as necessary to obtain a desired film thickness.
この後、７００℃〜１０００℃の酸素含有雰囲気中で熱
処理することにより酸化物超電導体を構成する各元素の
酸化物の混在した被膜を結晶化させ、酸化物超電導体の
被膜を得る。Thereafter, heat treatment is performed in an oxygen-containing atmosphere at 700° C. to 1000° C. to crystallize the film in which oxides of various elements constituting the oxide superconductor are mixed, thereby obtaining a film of the oxide superconductor.
この酸化物超電導体の被膜の厚さは、１００人〜ＩＸ
１０’入の範囲が好ましい。被膜のＩ７ざが １００人
未満であると磁場浸透により所定の超電導特性が得にく
くなり、また ＩＸ １０’人を越えてもそれ以上の超
電導特性の向上が得られなくなる一Ｌに、脆くなり金属
線から剥離したり、クラックが生じ易くなる。The thickness of the film of this oxide superconductor is 100~IX
A range of 10' is preferable. If the I7 of the coating is less than 100, it will be difficult to obtain the desired superconducting properties due to magnetic field penetration, and even if the IX of the coating exceeds 10, no further improvement in superconducting properties will be obtained. It is likely to peel off from the wire or cause cracks.
（作 用）
本発明の超電導線材の製造方法では、ペロブスカイト型
の酸化物足１１１ｆ １体を構成する各元素の金属塩を
所定の比率で含有する溶液の塗布、焼成により酸化物超
電導体の被膜を形成しているので、容易に膜厚Ｊ３よび
組成の均一な被膜を形成することができる。また、面方
向の線膨脹係数が５×１０４／Ｋ〜２５ｘ１０−’／Ｋ
の金属線を使用することにより、得られる酸化物超電導
体被膜との線Ｉｌ！脹係数が近似し、これにより金属線
と被膜との接合界面の冷熱サイクルによるストレスが小
さくなり、密着性に優れたものとなる。(Function) In the method for producing a superconducting wire of the present invention, a coating of an oxide superconductor is formed by applying a solution containing a predetermined ratio of metal salts of each element constituting the perovskite-type oxide legs 111f and firing. Therefore, a film having a uniform thickness J3 and a uniform composition can be easily formed. In addition, the linear expansion coefficient in the plane direction is 5 x 104/K ~ 25 x 10-'/K
By using the metal wire of Il! with the obtained oxide superconductor coating, The expansion coefficients are similar, which reduces the stress caused by thermal cycles at the bonding interface between the metal wire and the coating, resulting in excellent adhesion.
（実施例） 次に、本発明の実施例について説明する。(Example) Next, examples of the present invention will be described.
実施例
まずＹ（ＮＯ３） ３ ・６ｔｈ Ｏ粉末、Ｂａ （Ｎ
Ｏ３） ２粉末およびＣｕ （ＮＯ３） ２ ・３１１
２０粉末を、’＋’：Ｂａ：ｃｕ＝１：２：３のモル比
となるように混合し、この混合粉を水中に溶解させた。Example First, Y(NO3) 3 .6th O powder, Ba(N
O3) 2 powder and Cu (NO3) 2 ・311
20 powders were mixed at a molar ratio of '+':Ba:cu=1:2:3, and this mixed powder was dissolved in water.
次に、この溶液をスプレー法により直径１＋ｎのへ〇線
上に塗布し、次いでこのＡｇ線をホットプレート上に載
置し、約６５０℃の温度で塗膜を加熱して熱分解させた
。この溶液の塗布と熱分解とを、結晶化侵の被膜の厚さ
が１ＸＩＯ’人となるように、繰返し行い、最少に、こ
の熱分解による被膜を形成したＡｇ線を酸素中で約９０
０℃の温喰により２４時間熱処理して、
一般式
％式％
で示されるべし】ブスカイト型の酸化物超電導体からな
る被膜を有する超電導線材を得た。Next, this solution was applied onto a circle wire having a diameter of 1+n by a spray method, and then this Ag wire was placed on a hot plate, and the coating film was heated at a temperature of about 650° C. to thermally decompose it. Application of this solution and thermal decomposition are repeated so that the thickness of the crystallized film becomes 1XIO', and at a minimum, the Ag wire with the film formed by this thermal decomposition is heated in oxygen for about 90°C.
A superconducting wire having a film made of a buskyte-type oxide superconductor was obtained by heat treatment for 24 hours in a warm oven at 0° C., as expressed by the general formula %.
このようにして得た超電導線材の超電導特性を測定した
ところ、臨界温度は９０にであった。When the superconducting properties of the superconducting wire thus obtained were measured, the critical temperature was 90°C.
次に、この超電導線材を曲率半径３０００ ｕに曲げ被
膜にストレスを加えた状態で、液体窒素中への浸漬と常
温への復帰の冷熱サイクルを１０回加えたが、超電導体
被膜面にクラックの発生は認められなかった。Next, this superconducting wire was bent to a radius of curvature of 3000 u, stress was applied to the coating, and a cooling/heating cycle of immersion in liquid nitrogen and return to room temperature was applied 10 times, but no cracks appeared on the surface of the superconducting coating. No occurrence was observed.
［発明の効果］
以上の実施例からも明らかなように、本発明の超電導線
材の製造方法によれば、ペロブスカイト型の酸化物超電
導体を構成する各元素の金属塩を所定の比率で含有する
溶液の塗布、焼成により被膜を形成しているので、容易
に膜厚および組成の均一な酸化物超電導体被膜を有する
超電導線材が得られる。[Effects of the Invention] As is clear from the above examples, according to the method for producing a superconducting wire of the present invention, metal salts of each element constituting a perovskite-type oxide superconductor are contained in a predetermined ratio. Since the coating is formed by applying a solution and firing, a superconducting wire having an oxide superconductor coating with a uniform thickness and composition can be easily obtained.
また、実施例に示したように、金属線として線膨脹係数
が５Ｘ１０６／Ｋ〜２５Ｘ １０６／Ｋの素材を使用す
るようにずれば、得られる酸化物超電導体被膜との線膨
脹係数が近似し、これにより金属線と被膜との接合界面
の冷熱サイクルによるひずみの発生が小さく、剥離やク
ラックの発生のおそれがなく、長期にわたって良好な特
性を維持することができる超電導線材が得られる。Furthermore, as shown in the example, if a material with a linear expansion coefficient of 5X106/K to 25X106/K is used as the metal wire, the linear expansion coefficient will be similar to that of the obtained oxide superconductor coating. As a result, a superconducting wire can be obtained in which the strain caused by thermal cycles at the bonding interface between the metal wire and the coating is small, and there is no risk of peeling or cracking, and which can maintain good properties over a long period of time.
Claims (7)
被膜を形成してなる超電導線材を製造するにあたり、 前記酸化物超電導体を構成する各元素の金属塩を所定の
比率で含有する溶液を前記金属線上に塗布し、この塗膜
を加熱することにより前記各元素の金属塩を熱分解し、
次いで酸素含有雰囲気中で７００℃〜１０００℃の温度
で熱処理して前記酸化物超電導体の被膜を形成すること
を特徴とする超電導線材の製造方法。(1) In manufacturing a superconducting wire material formed by forming a film of a perovskite-type oxide superconductor on a metal wire, a solution containing metal salts of each element constituting the oxide superconductor in a predetermined ratio is added to the above-mentioned solution. The metal salts of each of the above elements are thermally decomposed by coating on a metal wire and heating this coating film,
A method for manufacturing a superconducting wire, comprising: then heat-treating at a temperature of 700°C to 1000°C in an oxygen-containing atmosphere to form a coating of the oxide superconductor.
ロブスカイト型の酸化物超電導体であることを特徴とす
る特許請求の範囲第１項記載の超電導線材の製造方法。(2) The method for manufacturing a superconducting wire according to claim 1, wherein the oxide superconductor is a perovskite-type oxide superconductor containing a rare earth element.
７＿−＿８系の酸化物超電導体（Ａは、Ｙ、Ｓｃ、Ｎｄ
、Ｇｄ、Ｓｍ、Ｙｂ、Ｌａ、Ｈｏ、Ｄｙ、Ｅｕ、Ｅｒ、
ＴｍおよびＬｕから選ばれた元素）であることを特徴と
する特許請求の範囲１項または第２項記載の超電導線材
の製造方法。(3) The oxide superconductor is ABa_2Cu_3O_
7_-_8-based oxide superconductor (A is Y, Sc, Nd
, Gd, Sm, Yb, La, Ho, Dy, Eu, Er,
3. The method for producing a superconducting wire according to claim 1 or 2, wherein the superconducting wire is an element selected from Tm and Lu.
あることを特徴とする特許請求の範囲第３項記載の超電
導線材の製造方法。(4) The method for manufacturing a superconducting wire according to claim 3, wherein the oxide superconductor is Y-Ba-Cu-O based.
Ｋ〜２５×１０＾−＾６／Ｋ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４項のいずれか１項記載の
超電導線材の製造方法。(5) The linear expansion coefficient of the metal wire is 5×10^-^6/
The method for manufacturing a superconducting wire according to any one of claims 1 to 4, characterized in that K~25×10^-^6/K.
特許請求の範囲第５項記載の超電導線材の製造方法。(6) The method for manufacturing a superconducting wire according to claim 5, wherein the metal wire is made of Ag wire.
、ハロゲン化物または硝酸塩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６項のいずれか１項記載の
超電導線材の製造方法。(7) The superconducting wire according to any one of claims 1 to 6, wherein the metal salt of each element constituting the oxide superconductor is a halide or a nitrate. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133145A JPS63298921A (en) | 1987-05-28 | 1987-05-28 | Manufacture of superconductive wire material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133145A JPS63298921A (en) | 1987-05-28 | 1987-05-28 | Manufacture of superconductive wire material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63298921A true JPS63298921A (en) | 1988-12-06 |
Family
ID=15097783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62133145A Pending JPS63298921A (en) | 1987-05-28 | 1987-05-28 | Manufacture of superconductive wire material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63298921A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03101177A (en) * | 1989-09-13 | 1991-04-25 | Sumitomo Cement Co Ltd | Formation of thin film superconductor pattern |
-
1987
- 1987-05-28 JP JP62133145A patent/JPS63298921A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03101177A (en) * | 1989-09-13 | 1991-04-25 | Sumitomo Cement Co Ltd | Formation of thin film superconductor pattern |
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