JPH02184555A - Silver-containing superconductive ceramics and superconductive wire using the same ceramics - Google Patents
Silver-containing superconductive ceramics and superconductive wire using the same ceramicsInfo
- Publication number
- JPH02184555A JPH02184555A JP1005230A JP523089A JPH02184555A JP H02184555 A JPH02184555 A JP H02184555A JP 1005230 A JP1005230 A JP 1005230A JP 523089 A JP523089 A JP 523089A JP H02184555 A JPH02184555 A JP H02184555A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- ceramics
- superconductive
- silver
- ceramic
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 50
- 229910052709 silver Inorganic materials 0.000 title abstract description 19
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title abstract description 17
- 239000004332 silver Substances 0.000 title abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 14
- 239000011247 coating layer Substances 0.000 claims 4
- 239000000463 material Substances 0.000 abstract description 30
- 238000000034 method Methods 0.000 abstract description 5
- 238000013329 compounding Methods 0.000 abstract description 2
- 229910009203 Y-Ba-Cu-O Inorganic materials 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 239000010949 copper Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 125000004430 oxygen atom Chemical group O* 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000010409 thin film Substances 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
近年、液体窒素温度以上で、超伝導状態を示す、超伝導
セラミックスの研究開発がさかんに行なわれている０本
発明は、前記銀含有超伝導セラミックスおよびそれを用
いた超伝導線に関するものである。[Detailed Description of the Invention] Industrial Application Fields In recent years, research and development of superconducting ceramics that exhibit a superconducting state at temperatures above liquid nitrogen temperature have been actively conducted. and superconducting wires using it.
従来の技術
以下、まず従来の超伝導セラミックスを明らかにするた
め、その製造方法について説明する。超伝導セラミック
スの製造方法としては、Ｙ２Ｏ８ＢａＣＯ３とＣｕＯを
ｉ：４：ｅの比で調合し攪拌する６次に大気中で９００
℃で６時間、５００゛Ｃで３時間仮焼成し、そこで得ら
れたセラミックス状の物質を再び粉砕する。次に２００
ｋｇ重／ Ｃａ程度の圧力で形状を整えた後、その物質
を９００°Ｃで１０時間、５００°Ｃで５時間焼結する
ことにより作製される。BACKGROUND OF THE INVENTION In order to clarify conventional superconducting ceramics, a method for manufacturing them will be explained. The method for producing superconducting ceramics is to mix Y2O8BaCO3 and CuO in a ratio of i:4:e, stir the mixture, and then heat it in the atmosphere for 900 min.
C. for 6 hours and 500.degree. C. for 3 hours, and the resulting ceramic material is ground again. then 200
It is produced by sintering the material at 900°C for 10 hours and at 500°C for 5 hours after shaping it at a pressure on the order of kg weight/Ca.
従来の超伝導セラミックスは化学式Ｙ＋ＢａｔＣｕｌＯ
ｙかつｙが６．５以上７，０以下で表わされる。前記物
質は常温においては、金属導体より高い抵抗値を示すが
、液体窒素温度以上の超伝導転移温度以下まで冷却する
と、超伝導状態となる。Conventional superconducting ceramics have the chemical formula Y+BatCulO
y and y is expressed as 6.5 or more and 7.0 or less. The substance exhibits a higher resistance value than a metal conductor at room temperature, but becomes superconductive when cooled to a temperature above the liquid nitrogen temperature and below the superconducting transition temperature.
以下、従来の超伝導セラミックスを用いた超伝導線につ
いて説明する。Hereinafter, a superconducting wire using conventional superconducting ceramics will be explained.
第５図は従来の超伝導線の断面図である。第５図におい
て１はＡｇからなる被覆膜である。２は従来の超伝導セ
ラミックスである。以下、従来の超伝導線について明ら
かにするため、その製造方法について説明する。まずｙ
２ｏａ、Ｂａ Ｃｏ３゜ＣｕＯの粉末を調合し、それを
９００ ’Ｃで６時間、５００°Ｃで３時間仮焼成した
後、それを粉砕し、圧力をかけて棒状に成形する。次に
９００℃で１０時間、５００°Ｃで５時間焼成する。そ
れを銀からなるシース材に挿入し、伸線した後９００°
Ｃで２０時間、５００°Ｃで１０時間焼成する。前記得
られた超伝導線は、液体窒素温度以上の臨界温度以下ま
で冷却すると、超伝導状態となる。FIG. 5 is a cross-sectional view of a conventional superconducting wire. In FIG. 5, 1 is a coating film made of Ag. 2 is a conventional superconducting ceramic. Hereinafter, in order to clarify the conventional superconducting wire, a manufacturing method thereof will be explained. First y
A powder of 2 oa, BaCo3°CuO is prepared, and after calcining it at 900'C for 6 hours and at 500°C for 3 hours, it is crushed and molded into a rod shape under pressure. Next, it is baked at 900°C for 10 hours and at 500°C for 5 hours. After inserting it into a sheath material made of silver and drawing it,
C. for 20 hours and 500°C for 10 hours. The obtained superconducting wire becomes superconducting when it is cooled to a temperature above the liquid nitrogen temperature and below a critical temperature.
発明が解決しようとする課題
しかしながら従来の超伝導セラミックスは、超伝導転移
温度以下では、その抵抗値が０になるものの、転移温度
以上では金属導体よりも高い抵抗値となる。したがって
、実際に用いる場合、臨界温度を少しでも越えると発熱
し焼損してしまう。Problems to be Solved by the Invention However, conventional superconducting ceramics have a resistance value of zero below the superconducting transition temperature, but a resistance value higher than that of metal conductors above the transition temperature. Therefore, in actual use, if the critical temperature is exceeded even slightly, it will generate heat and burn out.
超伝導セラミ・ンクスの臨界温度は液体窒素温度に近い
ため、冷媒として液体窒素を用いる限り臨界温度を越え
やすく、応用の範囲が狭い。前記セラミックスを薄膜化
して、電子回路基板の配線パターンとして用いる場合、
臨界温度以下では、抵抗値がＯになり、有効な効果があ
るが、臨界温度以とでは、抵抗が存在し、金属導体を用
いた方が有効である。The critical temperature of superconducting ceramic inxes is close to that of liquid nitrogen, so as long as liquid nitrogen is used as a refrigerant, it is easy to exceed the critical temperature and the range of applications is narrow. When the ceramic is made into a thin film and used as a wiring pattern for an electronic circuit board,
Below the critical temperature, the resistance value becomes O, and there is an effective effect; however, below the critical temperature, resistance exists and it is more effective to use a metal conductor.
また超伝導物質に超伝導電流を流しているとき、セラミ
ックス中のある小さな領域が、臨界電流密度を越えると
、その部分が常伝導状態となり、その部分に熱が発生す
る。その熱によって周囲の超伝導状態を破壊し、ひいて
は全体の超伝導性を不安定にしてしまうという問題点を
有していた。Furthermore, when a superconducting current is passed through a superconducting material, if a certain small area in the ceramic exceeds the critical current density, that area becomes normal conductive and heat is generated in that area. The problem was that the heat destroyed the surrounding superconducting state, which in turn destabilized the overall superconductivity.
従来の超伝導線では以下の問題点がある。Conventional superconducting wires have the following problems.
従来の超伝導線は、Ａｇからなるシース材に従来の超伝
導セラミックスを導入し、伸延して作製する。しかし、
シース材と超伝導セラミックス間に密着性がよくなく、
液体窒素温度と常温との間の温度変化を繰り返すことに
より、超伝導セラミックスにクラックが入る。超伝導線
に電流を流すと、クランク部で発熱がおこり、焼を具す
る。Conventional superconducting wires are manufactured by introducing conventional superconducting ceramics into a sheath material made of Ag and stretching the sheath material. but,
Adhesion between the sheath material and superconducting ceramics is poor,
Cracks appear in superconducting ceramics due to repeated temperature changes between liquid nitrogen temperature and room temperature. When a current is passed through the superconducting wire, heat is generated in the crank section, causing it to burn out.
またシース材として酸素透過性のよいＡｇを用いている
ため、超伝導線として、使用していると、超伝導セラミ
ックスの酸素原子が欠損し、超伝導特性が失なわれると
いう問題点があった。In addition, since Ag, which has good oxygen permeability, is used as the sheath material, there is a problem that when used as a superconducting wire, oxygen atoms in the superconducting ceramic are lost and the superconducting properties are lost. .
課題を解決するための手段
上記課題を解決するため、本発明の超伝導セラミックス
はＹ、Ｂａ２Ｃｕ８０ｙからなり、かつｙが６．５以上
７．０以下で表わされる物質１モルに対し、Ａ ｇ −
１−０，１モル以上、含有している（以下銀含有超伝導
セラミックスと呼ぶ）という構成を備えたものである。Means for Solving the Problems In order to solve the above problems, the superconducting ceramic of the present invention contains A g −
It has a structure in which it contains 1-0.1 mole or more (hereinafter referred to as silver-containing superconducting ceramics).
なお酸素欠ｔＪＩＩと超伝導の発現性の関係よりｙの値
は６．７以上７．０以下である方が、より好ましい。Note that the value of y is more preferably 6.7 or more and 7.0 or less based on the relationship between oxygen deficiency tJII and superconductivity.
また本発明の超伝導線は銀含有超伝導セラミックスをＡ
ｇからなるシース材で被覆し、かつ前記Ａｇ上にＣｕか
らなる物質で被覆したものである。In addition, the superconducting wire of the present invention is made of silver-containing superconducting ceramics.
The Ag is coated with a sheath material made of Ag, and the Ag is coated with a substance made of Cu.
作用
本発明の銀含有超伝導セラミックスは、Ａｇを０．１モ
ル以上含有させているため、Ａｇの結晶がセラミックス
の粒塊に析出する。したがって常温状態でも、Ａｇを流
れる電流経路ができ、金属物質と同等の抵抗値が得られ
る。また超伝導セラミックス中の部分的な、過剰電流に
対して、部分的に超伝導状態がこわれて発熱し常伝導状
態部が発生しても電流はその回りのＡｇを介した経路に
流れる。その後、超伝導状態が破壊された結晶は冷却さ
れて超伝導状態に戻る。この様に安定した超伝導状態が
保てる。Function Since the silver-containing superconducting ceramic of the present invention contains 0.1 mole or more of Ag, Ag crystals are precipitated in the ceramic grains. Therefore, even at room temperature, a current path is created through Ag, and a resistance value equivalent to that of a metal material can be obtained. In addition, even if the superconducting state is partially broken and heat is generated in response to a partial excessive current in the superconducting ceramic, and a normal conductive state portion is generated, the current flows in a path via the surrounding Ag. After that, the crystal whose superconducting state has been destroyed is cooled and returns to its superconducting state. In this way, a stable superconducting state can be maintained.
また本発明の超伝導線は、超伝導セラミックスの含有す
るＡｇとシース材のＡｇとの密着により、極低温と常温
の間の温度変化の繰り返しに強く、クラックが発生しに
くくなる。また酸素透過性の悪いＣｕで、シース材のＡ
ｇを被覆することにより、超伝導セラミックスの原素原
子が欠陥することがない。Further, the superconducting wire of the present invention is resistant to repeated temperature changes between extremely low temperatures and room temperature, and cracks are less likely to occur due to the close contact between the Ag contained in the superconducting ceramic and the Ag of the sheath material. In addition, since Cu has poor oxygen permeability, A of the sheath material
By coating with g, the elementary atoms of the superconducting ceramic will not be defective.
実施例
以下本発明の銀含有超伝導セラミックスの一実施例につ
いて図面を参照しながら説明する。本発明の超伝導セラ
ミックスはＹ、Ｂａ２Ｃｕ、Ｏｙからなりかつｙが６．
５以上７以下になる物質１モルに対しＡｇを０．１モル
以上含有しているという構成を備えたものである。EXAMPLE Hereinafter, an example of the silver-containing superconducting ceramic of the present invention will be described with reference to the drawings. The superconducting ceramic of the present invention is composed of Y, Ba2Cu, and Oy, and y is 6.
It has a structure in which 0.1 mol or more of Ag is contained per 1 mol of a substance having a molecular weight of 5 or more and 7 or less.
本発明の超伝導セラミックスを明らかにするために、そ
の製造方法について説明する。調合の段階において、Ｙ
２Ｏ３，ＢａＣＯ３，ＣｕＯに加えて、Ａｇｏを組成比
に合わせて（Ｙ２Ｏ８゜Ｂ ａ ＣＯ８，Ｃｕ Ｏの組
成比は１ ： ４ ： ６）調合し、以下前記従来の超
伝導セラミックスＹ１ＢａｇＣｕｚＯｙの作製と同様な
加工を施すことにより、作製できる。In order to clarify the superconducting ceramic of the present invention, a manufacturing method thereof will be explained. At the compounding stage, Y
In addition to 2O3, BaCO3, and CuO, Ago was prepared according to the composition ratio (the composition ratio of Y2O8゜BaCO8, CuO was 1:4:6), and the process was similar to the production of the conventional superconducting ceramic Y1BagCuzOy. It can be manufactured by performing various processing.
この様にして作製された超伝導セラミックスは、第１図
に示すように転移温度９０に付近で超伝導転移する。ま
た第２図は本発明超伝導セラミックスのＸ＆’Ａ回折パ
ターンである。Ｙ１Ｂａ２ＣｕｉＯｙの結晶の他に良導
体である、Ａｇの結晶が形成されていることがわかる。The superconducting ceramic produced in this manner undergoes a superconducting transition near a transition temperature of 90, as shown in FIG. FIG. 2 shows the X&'A diffraction pattern of the superconducting ceramic of the present invention. It can be seen that in addition to the crystals of Y1Ba2CuiOy, crystals of Ag, which is a good conductor, are formed.
したがってＹ ＨＢａ 、ＣＩＪ 、Ｏｙなる超伝導物
質と、Ａｇによる全屈物質の特性を兼ねそなえているこ
とがわかる。Therefore, it can be seen that it has both the characteristics of the superconducting materials YHBa, CIJ, and Oy, and the characteristics of the total bending material made of Ag.
以下本発明の超伝導線について説明する。第３図は本発
明の第１の実施例における超伝導線の断面図である。第
３図においてｌは、前述の本発明の超伝導セラミックス
、２はＡｇからなるシース材（以後、Ａｇシース材と呼
ぶ。）である。The superconducting wire of the present invention will be explained below. FIG. 3 is a sectional view of a superconducting wire in the first embodiment of the present invention. In FIG. 3, 1 is the superconducting ceramic of the present invention described above, and 2 is a sheath material made of Ag (hereinafter referred to as Ag sheath material).
本発明の超伝導線について、より明らかにするために、
その製造方法について説明する。まずＹ２０３．ＢａＣ
Ｏ３，Ｃｕｂ、Ａｇｏを組成比に合わせて調合し、それ
を９００ ”Ｃで６時間、５００ ”Ｃで３時間仮焼成
した後、それを粉砕し、圧力をかけて棒状に成形する。In order to clarify more about the superconducting wire of the present invention,
The manufacturing method will be explained. First, Y203. BaC
O3, Cub, and Ago are mixed according to the composition ratio, and after pre-sintering at 900''C for 6 hours and 500''C for 3 hours, it is pulverized and molded into a rod shape under pressure.
それをＡｇからなるシース材に挿入し、伸線した後に９
００ ”Ｃで２０時間、５０ Ｑ ”Ｃで１０時間焼成
する。この物質は液体窒素温度で超伝導特性を示す。な
おＡｇ層の膜厚は焼成時の酸素原子の透過性の問題がら
０．５ｕｕ＊以下に形成する。After inserting it into a sheath material made of Ag and drawing it,
Bake at 00"C for 20 hours and at 50Q"C for 10 hours. This material exhibits superconducting properties at liquid nitrogen temperatures. The thickness of the Ag layer is set to 0.5 uu* or less due to the permeability of oxygen atoms during firing.
第４図は本発明の第２の実施例における、超伝導線の断
面図である。第４図において１は、銀含有超伝導セラミ
ックス、２はＡｇシース材、３はＣｕからなるシース材
（以後、Ｃｕシース材と呼ぶ）である。FIG. 4 is a sectional view of a superconducting wire in a second embodiment of the present invention. In FIG. 4, 1 is a silver-containing superconducting ceramic, 2 is an Ag sheath material, and 3 is a sheath material made of Cu (hereinafter referred to as Cu sheath material).
本発明の第２の実施例と第１の実施例の超伝導線との相
違点は、Ａｇシース材上にＣｕシース材で被覆したこと
にある。Ｃｕシース材の形成方法としては、メツキ技術
またはＣｕペーストの塗布技術により形成する。The difference between the second embodiment of the present invention and the superconducting wire of the first embodiment is that the Ag sheath material is coated with the Cu sheath material. The Cu sheath material is formed by a plating technique or a Cu paste coating technique.
なおＣｕシース材は超伝導セラミックスがらの酸素原子
が欠損することを防止するものである。Note that the Cu sheath material prevents oxygen atoms from being lost in the superconducting ceramic.
したがってＣｕのみに限定するものではなく、たとえば
ＣｕペーストのようなＣｕと接着剤のような混合物であ
ってもよい。Therefore, the material is not limited to Cu, but may be a mixture of Cu such as Cu paste and adhesive.
発明の効果
以上の様に本発明では、超伝導セラミックス中に、銀を
含有させることにより、常伝導状態における抵抗の値を
低下させると同時に、部分的に過剰な電流に対しても安
定に超伝導状態を保てるようにできる。Effects of the Invention As described above, in the present invention, by incorporating silver into the superconducting ceramic, the resistance value in the normal conduction state can be lowered, and at the same time, the resistance value can be reduced stably even in the case of partially excessive current. It is possible to maintain a conductive state.
また本発明の超伝導線は、銀含有の超伝導セラミックス
をＡｇのシース材に挿入して作ることにより、超伝導セ
ラミックスとシース材の密着性を向上させ、クラックの
発生を防ぐことができ、したがって常温と極低温の温度
変化の繰り返しに非常に強く安定な超伝導線を得ること
ができる。さらに上記の超伝導線の回りを銅で被覆する
ことにより、超伝導セラミックスの酸素原子の欠損を防
ぐことができ、経時変化がない安定な超伝導線を得るこ
とができる。In addition, the superconducting wire of the present invention is made by inserting a silver-containing superconducting ceramic into an Ag sheath material, thereby improving the adhesion between the superconducting ceramic and the sheath material and preventing the occurrence of cracks. Therefore, it is possible to obtain a superconducting wire that is extremely strong and stable against repeated temperature changes between room temperature and extremely low temperature. Furthermore, by covering the superconducting wire with copper, it is possible to prevent oxygen atoms from being lost in the superconducting ceramic, and it is possible to obtain a stable superconducting wire that does not change over time.
第１図は本発明の銀含有超伝導セラミックスの温度−抵
抗率特性を示すグラフ、第２図は本発明の銀含有超伝導
セラミックスのＸ＆’ｉ１回折パターン図、第３図は本
発明超伝導線の第１の実施例の斜視図、第４図は本発明
超伝導線の第２の実施例の斜視図、第５図は従来の超伝
導線の斜視図である。
１・・・・・・銀含有超伝導セラミックス、２・・・・
・・Ａｇシース材、
３・・・・・・Ｃｕシース材。Fig. 1 is a graph showing the temperature-resistivity characteristics of the silver-containing superconducting ceramic of the present invention, Fig. 2 is an X&'i1 diffraction pattern diagram of the silver-containing superconducting ceramic of the present invention, and Fig. 3 is a graph showing the temperature-resistivity characteristics of the silver-containing superconducting ceramic of the present invention. FIG. 4 is a perspective view of a second embodiment of the superconducting wire of the present invention, and FIG. 5 is a perspective view of a conventional superconducting wire. 1... Silver-containing superconducting ceramics, 2...
...Ag sheath material, 3...Cu sheath material.
Claims (5)
Ｃｕ＿３Ｏ＿ｙかつｙが６．５から７．０で表わされる
物質１モルに対し、Ａｇを０．１モル以上、含有してい
ることを特徴とする超伝導セラミックス。(1) A substance that exhibits a superconducting phenomenon, Y_1Ba_2
A superconducting ceramic characterized by containing 0.1 mol or more of Ag per 1 mol of a substance represented by Cu_3O_y and y being 6.5 to 7.0.
ることを特徴とする請求項（１）記載の超伝導セラミッ
クス。(2) The superconducting ceramic according to claim (1), which contains 0.5 mol or more and 6.0 mol or less of Ag.
が６．７から７．０で表わされる物質１モルに対し、Ａ
ｇを０．５モル以上、含有している超伝導セラミックス
を、Ａｇからなる物質で第１の被覆層を形成されている
ことを特徴とする超伝導線。(3) Consists of Y_1Ba_2Cu_3O_y, and y
For 1 mole of a substance whose value is 6.7 to 7.0, A
1. A superconducting wire comprising a superconducting ceramic containing 0.5 mole or more of g, and a first coating layer formed of a substance made of Ag.
を特徴とする請求項（３）記載の超伝導線。(4) The superconducting wire according to claim (3), wherein the first coating layer has a thickness of 0.5 mm or less.
覆層を形成したことを特徴とする請求項（４）記載の超
伝導線。(5) The superconducting wire according to claim (4), characterized in that the second coating layer is formed on the first coating layer using a substance made of Cu.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1005230A JPH02184555A (en) | 1989-01-12 | 1989-01-12 | Silver-containing superconductive ceramics and superconductive wire using the same ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1005230A JPH02184555A (en) | 1989-01-12 | 1989-01-12 | Silver-containing superconductive ceramics and superconductive wire using the same ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02184555A true JPH02184555A (en) | 1990-07-19 |
Family
ID=11605386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1005230A Pending JPH02184555A (en) | 1989-01-12 | 1989-01-12 | Silver-containing superconductive ceramics and superconductive wire using the same ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02184555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000040520A1 (en) * | 1998-12-31 | 2000-07-13 | Ceramic Fuel Cells Limited | Electrically conductive ceramics |
-
1989
- 1989-01-12 JP JP1005230A patent/JPH02184555A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000040520A1 (en) * | 1998-12-31 | 2000-07-13 | Ceramic Fuel Cells Limited | Electrically conductive ceramics |
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