JPH01188640A - Production of superconducting wire - Google Patents
Production of superconducting wireInfo
- Publication number
- JPH01188640A JPH01188640A JP63009530A JP953088A JPH01188640A JP H01188640 A JPH01188640 A JP H01188640A JP 63009530 A JP63009530 A JP 63009530A JP 953088 A JP953088 A JP 953088A JP H01188640 A JPH01188640 A JP H01188640A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- wire
- porous body
- impregnated
- ceramics
- 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 8
- 239000007769 metal material Substances 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 229910010293 ceramic material Inorganic materials 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 abstract description 18
- 239000001301 oxygen Substances 0.000 abstract description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 15
- 239000000843 powder Substances 0.000 abstract description 11
- 239000007787 solid Substances 0.000 abstract description 4
- 239000011230 binding agent Substances 0.000 abstract description 3
- 239000007858 starting material Substances 0.000 abstract 4
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000002994 raw material Substances 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- 238000005491 wire drawing 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
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、酸化物系超電導セラミックス材料の線材化方
法に関する。特に、その超電導セラミックス物質の酸素
欠損の生じないような線材化方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of forming an oxide-based superconducting ceramic material into a wire rod. In particular, the present invention relates to a method of forming the superconducting ceramic material into a wire without causing oxygen vacancies.
［従来の技術］
Ｙ−Ｂａ−Ｃｕ−０系、Ｌａ−Ｂａ−Ｃｕ−０系等の超
電導セラミックス物質を線材化する場合、一般に金属パ
イプ中にセラミックス粉末を詰めた後に、圧延又は引さ
抜きによって線材化し、更に熱処理する方法がとられて
いる。[Prior Art] When making wire rods from superconducting ceramic materials such as Y-Ba-Cu-0 series and La-Ba-Cu-0 series, generally a metal pipe is filled with ceramic powder and then rolled or drawn. A method is used in which the wire is made into a wire and then heat-treated.
然し乍ら、この線材化方法では超電導セラミックス中の
酸素が充分に供給されないことにより、臨界電流密度及
び／又は臨界温度が低下するという結果を招く。また圧
延中に超電導セラミックス粉体同志の接触部分が少なく
なり超電導性を示さないことにもなる。即ち、従来の超
電導材の線材化方法では、超電導材の酸素含有率が不安
定になり、制御できなく、本来の超電導特性が得られな
い場合が多い。However, in this wire forming method, oxygen in the superconducting ceramic is not sufficiently supplied, resulting in a decrease in critical current density and/or critical temperature. Moreover, the contact area between the superconducting ceramic powders during rolling decreases, and superconductivity is not exhibited. That is, in the conventional method of forming a superconducting material into a wire, the oxygen content of the superconducting material becomes unstable and cannot be controlled, and the original superconducting properties cannot be obtained in many cases.
［発明が解決しようとする問題点］
本発明は、超電導ヤシミックス体の線材化処理において
、（１）臨界電流密度が低下する、（２）臨界温度が低
下する、０）酸素の供給が不１−分になる等の問題点を
解決する方法を提供することを目的とす゛る。即ち、本
発明の線材化方法は、超電導材は酸素を１−分に供給し
ないとその超電導特性が著しく低減されることを見出し
たことに基つくものである。[Problems to be Solved by the Invention] The present invention solves the following problems in the wire rod processing of a superconducting coconut mix: (1) a decrease in critical current density, (2) a decrease in critical temperature, and 0) an insufficient supply of oxygen. The purpose is to provide a method to solve problems such as 1-minute delay. That is, the method for producing a wire rod of the present invention is based on the discovery that the superconducting properties of a superconducting material are significantly reduced unless oxygen is supplied to the superconducting material.
［問題点を解決するための手段］
前記のような超電導セラミックス物質の線材を得るため
に、本発明は、超電導セラミックス物質の多孔質体を製
造し、その内部に該超電導セラミックス物質の融点以下
の融点を有する金属材料を溶融含浸させ、その金属含浸
したセラミックス物質多孔質体を圧延又は引き抜きによ
り線材化することを特徴とする超電導線材の製造方法で
ある。[Means for Solving the Problems] In order to obtain a wire made of a superconducting ceramic material as described above, the present invention manufactures a porous body of a superconducting ceramic material, and contains a porous material having a temperature below the melting point of the superconducting ceramic material inside the porous body. This method of manufacturing a superconducting wire is characterized by melting and impregnating a metal material having a melting point, and forming a porous ceramic material impregnated with the metal into a wire by rolling or drawing.
［発明の構成］
Ｌ ａ −Ｍ −Ｃｕ−０系（Ｍ ＝ Ｂ ａ又はＳｒ
）、Ｙ−Ｂａ−Ｃｕ−０系なとの超電導セラミックス物
質は、通常、原料粉末を組合せ混合し、１次焼成し、一
般に金属バイブ等の中に充填した後に、圧延又は引き抜
きによって超電導材の線材化がなされるものであるが、
そのバイブ中での圧延又は引き抜き処理中に酸素欠損が
生しることが多い。[Structure of the invention] La-M-Cu-0 system (M = Ba or Sr
), Y-Ba-Cu-0 type superconducting ceramic materials are usually made by combining and mixing raw material powders, firing them first, filling them into a metal vibrator, etc., and then rolling or drawing them into superconducting materials. Although it is made into wire rod,
Oxygen vacancies often occur during the rolling or drawing process in the vibrator.
本発明は、このような密閉容器中での超電導材処理に対
して、超電導材を開放雰囲気中で処理できるようにした
ものである。即ち、酸素の十分な供給のもとて処理する
ことにより、その超電導特性を著しく改良Ｃきることを
見出したものである。The present invention enables superconducting materials to be processed in an open atmosphere, as opposed to such processing of superconducting materials in a closed container. That is, it has been found that the superconducting properties can be significantly improved by treating the material with a sufficient supply of oxygen.
即ち、本発明は超電導セラミックス物質の多孔質体中に
溶融し、た金属材料を含浸きせた後に、これを圧延又は
線引きなとによって加工し、線材化Ｊる方法である。That is, the present invention is a method in which a porous body of superconducting ceramic material is melted and impregnated with a metal material, and then processed by rolling or wire drawing to form a wire rod.
本発明の超電導材の線材化方法を図によって説明する。The method of forming a superconducting material into a wire according to the present invention will be explained with reference to the drawings.
本発明の超電導材の線材化フｊ法によれば、先ず、超電
導セラミックス原料粉末を混合し、仮焼し、粉砕するこ
とにより超電導セラミ／ラス粉末原料を得る。この超電
導材粉末原料を、スラリーにしスポンジに吸収せしめ、
その吸収スポンジを焼成すること又は、この超電導材粉
末原料にバインダー及び固体有機物等を混合し、成形し
焼成焼結−する、つとにより、多孔質体を得る。According to the method for forming a superconducting material into a wire rod of the present invention, first, superconducting ceramic raw material powders are mixed, calcined, and pulverized to obtain a superconducting ceramic/lath powder raw material. This superconducting material powder raw material is made into a slurry and absorbed into a sponge.
A porous body is obtained by firing the absorption sponge, or by mixing a binder, a solid organic substance, etc. with this superconducting material powder raw material, shaping it, firing and sintering it.
、−のようにし−Ｃ得られた超電導セラミックス材多孔
質体は、図の１に示１ようなものである。The superconducting ceramic material porous body obtained as shown in FIG. 1 is as shown in FIG.
次に、この多孔質体に溶融した金属材料を含浸きせる。Next, this porous body is impregnated with a molten metal material.
即ち、金属材料を溶融した後に、その溶融金属中に多孔
質体をいれ、溶Ｉ−）た金属がその多孔質の細孔中に入
っていくように処理する（図の２の状態）。That is, after melting a metal material, a porous body is placed in the molten metal, and the process is performed so that the molten metal enters the pores of the porous material (state 2 in the figure).
更に、この金属含浸多孔質体を圧延或いは引き抜くこと
により、加工する（図の３のように引き伸ばされる）。Further, this metal-impregnated porous body is processed by rolling or drawing (it is stretched as shown in 3 in the figure).
即ち、超電導材は図の３の拡大図に示す如き組織になり
、線材化きれるものである。That is, the superconducting material has a structure as shown in the enlarged view of FIG. 3, and can be made into a wire.
このように圧延又は引き抜きされた超電導セラミックス
線材は、更に、熱処理され、安定した超電導特性を有す
るものが得られる。The thus rolled or drawn superconducting ceramic wire is further heat-treated to obtain one having stable superconducting properties.
本発明の線材化方法では、更に、酸素雰囲気中で熱処理
′４ることにより得られる超電導材の酸素含有率を制御
Ｖることのできるものである。In the wire rod production method of the present invention, it is further possible to control the oxygen content of the superconducting material obtained by heat treatment '4 in an oxygen atmosphere.
本発明に用いる多孔質体に含浸さける金属材料には、超
′１Ｆ導セラミックス材料より融点の低いものを用いる
。また、大電流での超電導状態で用いる場合に、超電導
状態が壊れたときにその大電流のバイパスにも使用でき
るように電気伝導性の大きな金属が好都合である。即ち
、例えば、Ａｇ、Ｃｕ、ＡＮ、Ａｕ等から選別される金
属或いはその合金が好適である。The metal material to be impregnated into the porous body used in the present invention has a melting point lower than that of the super 1F conductive ceramic material. Further, when used in a superconducting state with a large current, a metal with high electrical conductivity is advantageous so that it can be used to bypass the large current when the superconducting state is broken. That is, for example, metals selected from Ag, Cu, AN, Au, etc., or alloys thereof are suitable.
次にその具体的な例により、本発明の超電導セラミック
ス物質の線材化方法を示す。Next, a method of forming a superconducting ceramic material into a wire according to the present invention will be explained using a specific example.
［実施例コ
ＹＢａ＋Ｃｕ５Ｏ７−８の組成になるように超電導セラ
ミックス粉末原料を混合し、仮焼し、粉砕する。この仮
焼粉末をスラリー状にして、スポンジに吸収させ、その
スポンジを焼成する方法或いは、この仮焼原料粉末にバ
インダー及び固体有機物を混合した後に、成形して焼成
焼結する方法により各々のスポンジ物質或いは固体有機
物が焼成時に蒸発し、多孔質体が得られた。この得られ
た多孔質体は焼成時に１−分な酸素が供給され、多孔質
体中に十分に酸素を含有することが可能となる。[Example] Superconducting ceramic powder raw materials are mixed to have a composition of YBa+Cu5O7-8, calcined, and pulverized. Each sponge is made by making a slurry of this calcined powder, absorbing it into a sponge, and firing the sponge, or by mixing a binder and a solid organic substance with this calcined raw material powder, and then shaping it and firing and sintering it. The substance or solid organic matter evaporated during calcination and a porous body was obtained. This obtained porous body is supplied with 1 minute oxygen during firing, making it possible to sufficiently contain oxygen in the porous body.
この多孔質体中に、本多孔質体よりも融点の低い金属材
料、例えば、このＹ−Ｂａ−Ｃｕ−０系ではＡｇ、Ｃｕ
、Ａｊ！、Ａｕ等から選別される金属の溶融液体を流し
込み、該多孔質体中に含浸させた。In this porous body, a metal material having a melting point lower than that of the present porous body, for example, Ag, Cu in this Y-Ba-Cu-0 system.
,Aj! A molten liquid of a metal selected from , Au, etc. was poured into the porous body to impregnate it into the porous body.
この溶融含浸させた金属が冷却され、固化した後に、得
られた金属含浸多孔質セラミックス体を圧延又は引き抜
き処理等により線材化した。After the melt-impregnated metal was cooled and solidified, the obtained metal-impregnated porous ceramic body was made into a wire rod by rolling or drawing treatment.
この場合加工硬化した線材を軟化させるために熱処理を
行なう。また、同時に或いは別工程で酸素雰囲気中で熱
処理を行なうことにより超電導セラミックス線材中に酸
素を供給することができる。In this case, heat treatment is performed to soften the work-hardened wire. Further, oxygen can be supplied into the superconducting ceramic wire by performing heat treatment in an oxygen atmosphere at the same time or in a separate step.
この酸素アニール処理は、得られた線材の特性に応して
、適宜、選択すべきものと思われる。It seems that this oxygen annealing treatment should be selected as appropriate depending on the characteristics of the obtained wire.
以上のように本発明の超電導−セラミックスの線材化方
法は、酸素欠損が不可避的に生しる酸化物系超電導体の
すへてについて適応できるものである。As described above, the method of making a superconducting ceramic wire according to the present invention can be applied to all types of oxide-based superconductors in which oxygen vacancies inevitably occur.
［発明の効果］
本発明による超電導セラミックス物質の線材化方法は、
次のような顕著な技術的効果が得られた。[Effects of the Invention] The method of making a superconducting ceramic material into a wire according to the present invention is as follows:
The following remarkable technical effects were obtained.
第１に、超電導セラミックス物質を多孔質化することに
より線材化前に十分に酸素が供給された。First, by making the superconducting ceramic material porous, sufficient oxygen was supplied before it was made into a wire.
第２に、本発明による線材内にはセラミックスが密に詰
まっており、例え一部でセラミックス同志の接触が絶た
れても他の部分で十分に補うことができる超電導セラミ
ックス線材を得ることのできる方法を提供できた。Second, the wire according to the present invention is densely packed with ceramics, and even if contact between ceramics is broken in one part, it is possible to obtain a superconducting ceramic wire that can be sufficiently compensated for in other parts. I was able to provide a method.
第３に線材表面近傍にもセラミックス体が位置している
ために、最終の酸素供給のための熱処理による圧延、線
材化効率の効果が大となる方法が提供できた。Thirdly, since the ceramic body is located near the surface of the wire, we have been able to provide a method in which the efficiency of rolling and wire production by the final heat treatment for supplying oxygen is highly effective.
図は、本発明の線材化方法による工程を順次に示す斜視
図及び一部拡大図である。
［主要部分の符号の説明］
４００．超電導セラミックス
５１１．金属材The figures are a perspective view and a partially enlarged view sequentially illustrating the steps according to the wire rod forming method of the present invention. [Explanation of symbols of main parts] 400. Superconducting ceramics 511. metal material
Claims (1)
に該超電導セラミックス物質の融点以下の融点を有する
金属材料を溶融含浸させ、その金属含浸したセラミック
ス物質多孔質体を圧延又は引き抜きにより線材化するこ
とを特徴とする超電導線材の製造方法。Producing a porous body of superconducting ceramic material, melting and impregnating the inside thereof with a metal material having a melting point lower than the melting point of the superconducting ceramic material, and converting the metal-impregnated porous body of ceramic material into a wire rod by rolling or drawing. A method for manufacturing a superconducting wire characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63009530A JPH01188640A (en) | 1988-01-21 | 1988-01-21 | Production of superconducting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63009530A JPH01188640A (en) | 1988-01-21 | 1988-01-21 | Production of superconducting wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01188640A true JPH01188640A (en) | 1989-07-27 |
Family
ID=11722824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63009530A Pending JPH01188640A (en) | 1988-01-21 | 1988-01-21 | Production of superconducting wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01188640A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990013132A1 (en) * | 1989-04-27 | 1990-11-01 | Hwa Stephen C P | Process for increasing the critical current density of superconducting materials |
-
1988
- 1988-01-21 JP JP63009530A patent/JPH01188640A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990013132A1 (en) * | 1989-04-27 | 1990-11-01 | Hwa Stephen C P | Process for increasing the critical current density of superconducting materials |
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