JPH01161624A - Manufacture of oxide superconducting wire - Google Patents
Manufacture of oxide superconducting wireInfo
- Publication number
- JPH01161624A JPH01161624A JP62320438A JP32043887A JPH01161624A JP H01161624 A JPH01161624 A JP H01161624A JP 62320438 A JP62320438 A JP 62320438A JP 32043887 A JP32043887 A JP 32043887A JP H01161624 A JPH01161624 A JP H01161624A
- Authority
- JP
- Japan
- Prior art keywords
- silver
- oxide
- pipe
- oxygen
- raw material
- 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
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 claims abstract description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000001301 oxygen Substances 0.000 claims abstract description 24
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 24
- 150000001875 compounds Chemical class 0.000 claims abstract description 23
- 239000002887 superconductor Substances 0.000 claims abstract description 22
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052709 silver Inorganic materials 0.000 claims abstract description 17
- 239000004332 silver Substances 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 229910001923 silver oxide Inorganic materials 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 6
- 230000002194 synthesizing effect Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 229910009203 Y-Ba-Cu-O Inorganic materials 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 239000000843 powder Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-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
- 230000001747 exhibiting effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 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
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 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
- Oxygen, Ozone, And Oxides In General (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、酸化物系超電導線の製造方法に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a method for manufacturing an oxide-based superconducting wire.
（従来の技術）
最近１組成がＹ−Ｂａ−Ｃｕ−０などで表わされる酸化
物系化合物超電導体が注目されている。これら。(Prior Art) Recently, oxide-based compound superconductors whose composition is represented by Y--Ba--Cu-0, etc., have been attracting attention. these.
酸化物系化合物超電導体の多くは、臨界温度が液体窒素
温度以上である。このため、冷媒として高価で扱い難い
液体ヘリウムを使用する必要がないので、超電導技術を
飛躍的に発展させるものと期待されている。Many of the oxide-based compound superconductors have a critical temperature equal to or higher than the liquid nitrogen temperature. This eliminates the need to use liquid helium, which is expensive and difficult to handle, as a refrigerant, and is expected to dramatically advance superconducting technology.
ところで、酸化物系化合物超電導体の応用性を拡大する
には１通常のリード線のような線材を得る必要がある。By the way, in order to expand the applicability of oxide-based compound superconductors, it is necessary to obtain wires such as ordinary lead wires.
酸化物系化合物超電導体は、いわゆる焼き物であり、非
常に脆い。したがって、酸化物系化合物超電導体を単体
で線材化することは非常に困難である。このようなこと
から、従来。Oxide-based compound superconductors are so-called ceramics and are extremely brittle. Therefore, it is very difficult to make a single oxide-based compound superconductor into a wire rod. For this reason, conventional methods.
線材化するための種々の提案がなされている。Various proposals have been made for making wire rods.
これらの提案の中に、銀製のパイプ内に酸化物系の化合
物超電導体を合成し得る粉末原料を充填し、これに減面
加工を施した後、酸素雰囲気中で熱処理して上記化合物
超電導体を合成する方法がある。この方法では、減面加
工によって形成された細線で必要な回路要素を形作った
後、酸素雰囲気中で熱処理して前記粉末原料で化合物超
電導体を合成するようにしている。この場合、銀製のパ
イプ、つまり銀製のシースは、熱処理時に内部へ酸素が
浸透するのを容易化し、化合物超電導体層の生成を容易
化している。この方法であると、熱処理後に線材に外力
を加える必要がないので、生成された化合物超電導体層
を傷つける虞れがない。Among these proposals, a silver pipe is filled with a powder raw material capable of synthesizing an oxide-based compound superconductor, which is subjected to area reduction processing, and then heat-treated in an oxygen atmosphere to produce the above-mentioned compound superconductor. There is a way to synthesize. In this method, necessary circuit elements are formed using thin wires formed by area reduction processing, and then heat-treated in an oxygen atmosphere to synthesize a compound superconductor using the powder raw material. In this case, the silver pipe, ie, the silver sheath, facilitates the penetration of oxygen into the interior during heat treatment and facilitates the formation of the compound superconductor layer. With this method, there is no need to apply external force to the wire after heat treatment, so there is no risk of damaging the generated compound superconductor layer.
したがって、実質的に長い線材の製造を可能とする。Therefore, it is possible to manufacture substantially long wire rods.
しかしながら、上述した従来の製造方法にあっても次の
ような問題があった。すなわち、今までの研究によると
、酸化物系化合物超電導体の超電導特性は、熱処理時に
おける酸素の供給量によって大きく左右される。すなわ
ち、酸素の供給量が多い程１勝れた超電導特性を示すも
のを合成できる。従来の製造方法では、酸素は銀製のシ
ース内を拡散して内部に供給される。銀は他の金属に比
べて酸素を透過させ易い。しかし、シースとしての機能
を発揮させるにはある程度の厚みを必要とする。厚みが
増せば、酸素の透過量は少なくなる。However, even the conventional manufacturing method described above has the following problems. That is, according to previous research, the superconducting properties of oxide-based compound superconductors are largely influenced by the amount of oxygen supplied during heat treatment. That is, the larger the amount of oxygen supplied, the more excellent superconducting properties can be synthesized. In conventional manufacturing methods, oxygen is supplied internally by diffusing through a silver sheath. Silver is more permeable to oxygen than other metals. However, a certain degree of thickness is required to function as a sheath. As the thickness increases, the amount of oxygen permeation decreases.
このため、従来の製造方法では、超電導特性を向上させ
る上で限界に近かった。For this reason, conventional manufacturing methods are close to reaching their limits in improving superconducting properties.
（発明が解決しようとする問題点） 上述の如く、従来の銀シース法にあっては。(Problem that the invention attempts to solve) As mentioned above, in the conventional silver sheath method.
超電導特性を向上させようとしても本質的に困難であっ
た。Attempts to improve superconducting properties have been essentially difficult.
そこで本発明は、高い超電導特性を示す酸化物系超電導
線を容易に製造できる製造方法を提供することを目的と
している。Therefore, an object of the present invention is to provide a manufacturing method that can easily manufacture an oxide-based superconducting wire exhibiting high superconducting properties.
［発明の構成］
（問題点を解決するための手段）
−本発明に係る製造方法では、銀母村内に酸化物系の化
合物超電導体を合成し得る原料と酸化銀とを埋設し、し
かる後に酸素雰囲気中で熱処理して上記化合物超電導体
を合成するようにしている。[Structure of the invention] (Means for solving the problems) - In the production method according to the present invention, raw materials capable of synthesizing an oxide-based compound superconductor and silver oxide are buried in a silver mother village, and then The compound superconductor is synthesized by heat treatment in an oxygen atmosphere.
（作 用）
酸素雰囲気中で熱処理を行なうと、酸素がいわゆる銀シ
ースを拡散して原料の埋設されている位置まで浸透する
。同時に、酸化銀から酸素が解離し、この解離した酸素
も原料の埋設されている位置まで拡散浸透する。したが
って、従来の製造方法に比べて原料の埋設されている位
置へ多量の酸素を供給することが可能となり、この結果
、超電導特性を向上させることが可能となる。(Function) When heat treatment is performed in an oxygen atmosphere, oxygen diffuses through the so-called silver sheath and penetrates to the position where the raw material is buried. At the same time, oxygen is dissociated from silver oxide, and this dissociated oxygen also diffuses and permeates to the buried position of the raw material. Therefore, compared to conventional manufacturing methods, it is possible to supply a large amount of oxygen to the location where the raw material is buried, and as a result, it is possible to improve the superconducting properties.
（実施例） 以下１図面を参照しながら実施例を説明する。(Example) An embodiment will be described below with reference to one drawing.
第１図は本発明製造方法を採用し、がっ減面加工前の時
点における素材の断面を示している。すなわち１図中１
は母材兼シースとなる銀製のパイプを示し、２はパイプ
１内に同心的に配置された同じく銀製のパイプを示して
いる。パイプ２内には酸化銀（Ａｇ２０ ） ３か充填
されている。また。FIG. 1 shows a cross-section of the material before surface reduction processing, using the manufacturing method of the present invention. In other words, 1 in 1 figure
2 indicates a silver pipe serving as a base material and a sheath, and 2 indicates a silver pipe arranged concentrically within the pipe 1. The pipe 2 is filled with silver oxide (Ag20) 3. Also.
パイプ２とパイプ１との間には原料４が充填されている
。原料４は、この例では酸化イツトリウム粉末と、炭酸
バリウム粉末と、酸化銅粉末とをモル比で０．５ ：
１．０ ： ３．０の割合いに混合した混合物である。A raw material 4 is filled between the pipe 2 and the pipe 1. In this example, raw material 4 is composed of yttrium oxide powder, barium carbonate powder, and copper oxide powder in a molar ratio of 0.5:
This is a mixture with a ratio of 1.0:3.0.
このように形成された素材５に減面加工を施して直径１
１１１ｍに細線化した。次に、得られた細線で所望とす
る電気回路素子、この例ではコイル状に形作った後、酸
素雰囲気中で、 ９２０ ’Ｃ，５時間に亙って熱処理
し、この熱処理によって原料４内に化合物超電導体を合
成した。The material 5 formed in this way is subjected to surface reduction processing to have a diameter of 1
The wire was thinned to 111m. Next, the obtained thin wire is shaped into a desired electric circuit element, in this example a coil shape, and then heat treated in an oxygen atmosphere at 920'C for 5 hours. A compound superconductor was synthesized.
このようにして製造された酸化物系超電導線の特性を調
べたところ、酸化銀３を充填しない場合に比べて、臨界
電流密度は２０％向上していることが確認された。これ
は、熱処理時に酸化銀３から酸素が解離し、この解離酸
素も化合物生成に寄与しているからである。When the characteristics of the oxide-based superconducting wire manufactured in this way were investigated, it was confirmed that the critical current density was improved by 20% compared to the case where silver oxide 3 was not filled. This is because oxygen is dissociated from silver oxide 3 during heat treatment, and this dissociated oxygen also contributes to the formation of compounds.
第２図は本発明製造方法の別の実施形態を示す図である
。FIG. 2 is a diagram showing another embodiment of the manufacturing method of the present invention.
この実施例では、銀製の厚肉パイプ１１の内部に軸方向
に延びる孔１２を周方向に複数等間隔に設け、これら孔
１２内に酸化物系の化合物超電導体を合成し得る粉末原
料１３を充填するとともに厚肉パイプ１１の中心空間に
酸化銀１４を充填して素材５ａを形成している。そして
、上記のように形成された素材５ａに減面加工を施して
細線化し、しかる後に前記実施例と同様に酸素雰囲気中
で熱処理を行なっている。In this embodiment, a plurality of holes 12 extending in the axial direction are provided inside a thick-walled silver pipe 11 at equal intervals in the circumferential direction, and a powder raw material 13 capable of synthesizing an oxide-based compound superconductor is placed inside these holes 12. At the same time, the central space of the thick-walled pipe 11 is filled with silver oxide 14 to form the material 5a. Then, the material 5a formed as described above is subjected to surface reduction processing to make the wire thinner, and then heat treated in an oxygen atmosphere as in the previous embodiment.
このような製造方法であっても、熱処理時に酸化銀１４
から解離した酸素を化合物超電導体の合成に寄与させる
ことができる。したがって、高い超電導特性を示す超電
導線を製造することができる。Even with this manufacturing method, silver oxide 14 is removed during heat treatment.
Oxygen dissociated from can contribute to the synthesis of compound superconductors. Therefore, a superconducting wire exhibiting high superconducting properties can be manufactured.
なお１本発明は上記各実施例に限定されるものではない
。すなわち、酸化物系の化合物超電導体を合成するため
の原料はイツトリウム系に限定されるものではない。Note that the present invention is not limited to the above embodiments. That is, the raw material for synthesizing an oxide-based compound superconductor is not limited to yttrium-based materials.
［発明の効果］ 以上述べたように１本発明の製造方法によれば。[Effect of the invention] As described above, according to the manufacturing method of the present invention.
熱処理時に内側からも、酸素を供給することができるの
で高い超電導特性を示す酸化物系超電導線を製造できる
。Since oxygen can be supplied from the inside during heat treatment, an oxide-based superconducting wire that exhibits high superconducting properties can be manufactured.
第１図は本発明製造方法の一実施形態を説明するための
図、第２図は本発明製造方法の別の実施形態を説明する
ための図である。
１．２・・・銀製のバイブ、３．１４・・・酸化銀。
４．１３・・・原料、５．５ａ・・・素材、１１・・・
銀製の厚肉パイプ、１２・・・孔。
第１図
鴫１
第２図FIG. 1 is a diagram for explaining one embodiment of the manufacturing method of the present invention, and FIG. 2 is a diagram for explaining another embodiment of the manufacturing method of the present invention. 1.2...Silver vibe, 3.14...Silver oxide. 4.13...Raw material, 5.5a...Material, 11...
Thick-walled silver pipe, 12 holes. Figure 1 Shizu 1 Figure 2
Claims (2)
る原料と酸化銀とを埋設し、しかる後に酸素雰囲気中で
熱処理して上記化合物超電導体を合成するようにしたこ
とを特徴とする酸化物系超電導線の製造方法。(1) A material capable of synthesizing an oxide-based compound superconductor and silver oxide are buried in a silver base material, and then heat-treated in an oxygen atmosphere to synthesize the compound superconductor. A method for manufacturing an oxide-based superconducting wire.
れる化合物超電導体を合成し得るものであることを特徴
とする特許請求の範囲第１項記載の酸化物系超電導線の
製造方法。(2) Production of an oxide-based superconducting wire according to claim 1, wherein the raw material is capable of synthesizing a compound superconductor having a composition represented by Y-Ba-Cu-O. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62320438A JPH01161624A (en) | 1987-12-18 | 1987-12-18 | Manufacture of oxide superconducting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62320438A JPH01161624A (en) | 1987-12-18 | 1987-12-18 | Manufacture of oxide superconducting wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01161624A true JPH01161624A (en) | 1989-06-26 |
Family
ID=18121448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62320438A Pending JPH01161624A (en) | 1987-12-18 | 1987-12-18 | Manufacture of oxide superconducting wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01161624A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA018409B1 (en) * | 2008-03-06 | 2013-07-30 | Юничарм Корпорейшн | Female member for hook-and-loop fastener, hook-and-loop fastener employing the female member, and absorbent article employing the hook-and-loop fastener |
-
1987
- 1987-12-18 JP JP62320438A patent/JPH01161624A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA018409B1 (en) * | 2008-03-06 | 2013-07-30 | Юничарм Корпорейшн | Female member for hook-and-loop fastener, hook-and-loop fastener employing the female member, and absorbent article employing the hook-and-loop fastener |
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