JPH05182539A - Manufacture of bismuth group oxide superconductive wire - Google Patents
Manufacture of bismuth group oxide superconductive wireInfo
- Publication number
- JPH05182539A JPH05182539A JP4001562A JP156292A JPH05182539A JP H05182539 A JPH05182539 A JP H05182539A JP 4001562 A JP4001562 A JP 4001562A JP 156292 A JP156292 A JP 156292A JP H05182539 A JPH05182539 A JP H05182539A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- wire
- heat treatment
- superconducting
- shaped wire
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical group [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 title 1
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 17
- 238000005097 cold rolling Methods 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 239000002887 superconductor Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 238000005482 strain hardening Methods 0.000 claims description 5
- 229910014472 Ca—O Inorganic materials 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 abstract description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052709 silver Inorganic materials 0.000 abstract description 2
- 239000004332 silver Substances 0.000 abstract description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract 2
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract 2
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 235000010216 calcium carbonate Nutrition 0.000 abstract 1
- 238000010622 cold drawing Methods 0.000 abstract 1
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 abstract 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 abstract 1
- 229910000018 strontium carbonate Inorganic materials 0.000 abstract 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- 229910015901 Bi-Sr-Ca-Cu-O Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052757 nitrogen 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
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003826 uniaxial pressing Methods 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
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は超電導線の製造方法に係
り、特に金属シース法による酸化物超電導線の製造方法
の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a superconducting wire, and more particularly to improvement of a method of manufacturing an oxide superconducting wire by a metal sheath method.
【０００２】[0002]
【従来の技術】Ｂｉ−Ｓｒ−Ｃａ−Ｃｕ−Ｏ系（Ｂｉ
系）の超電導体は、その臨界温度（Ｔｃ）が８０〜１１
０Ｋと液体窒素温度以上の値を有し、Ｙ−Ｂａ−Ｃｕ−
Ｏ系（Ｙ系）の超電導体に比較して安定性および加工性
に優れ、また非希土類系の組成からなるため、その素材
の供給や取扱いに有利である上、Ｔｌ−Ｂａ−Ｃａ−Ｃ
ｕ−Ｏ系（Ｔｌ系）の超電導体のように毒性もないこと
から酸化物超電導体の実用材料として期待されている。2. Description of the Related Art Bi-Sr-Ca-Cu-O system (Bi
System) has a critical temperature (Tc) of 80 to 11
Y-Ba-Cu- having a value of 0K and liquid nitrogen temperature or higher.
Compared to O-based (Y-based) superconductors, it is superior in stability and workability, and because it is composed of a non-rare earth-based composition, it is advantageous in the supply and handling of the material, and Tl-Ba-Ca-C.
It is expected to be a practical material for oxide superconductors because it is not toxic like uO (Tl) superconductors.
【０００３】また、Ｂｉ系の超電導体は板状組織を有し
ているため、機械的な圧縮加工により結晶の配向性が向
上し、高い臨界電流密度（Ｊｃ）が得られるという特徴
がある。一方、酸化物超電導体の実用化のためには、薄
膜やバルク等の他、線材化の技術を確立することが必要
である。Further, since the Bi type superconductor has a plate-like structure, the orientation of crystals is improved by mechanical compression processing, and a high critical current density (Jc) can be obtained. On the other hand, in order to put the oxide superconductor into practical use, it is necessary to establish a technique for forming a wire rod in addition to a thin film, a bulk, and the like.
【０００４】線材を製造するために、現在種々の方法が
検討されているが、その代表的な方法の一つとして金属
シース法が知られている。この方法は原料粉末を金属管
中に充填し、これに線引加工や圧延加工等の減面加工を
施した後、焼結することにより内部の原料粉末を超電導
体に成長させて超電導線を製造するものである。この方
法は、金属管で被覆されているために非常に加工が容易
であり、長尺の線材の製造に適しており、特にＢｉ系の
超電導体に対しては、上記の減面加工により結晶面が同
方向に揃い、高いＪｃを有する線材が得られるため適し
た方法であると言える。Various methods are currently being studied for manufacturing a wire rod, and a metal sheath method is known as one of the typical methods. In this method, the raw material powder is filled in a metal tube, subjected to surface-reduction processing such as wire drawing and rolling, and then sintered to grow the raw material powder into a superconductor to form a superconducting wire. It is manufactured. This method is very easy to work because it is covered with a metal tube, and is suitable for the production of long wire rods. Especially for Bi-based superconductors, the above-described surface-reduction processing is used to crystallize. It can be said that this method is suitable because the surfaces are aligned in the same direction and a wire having a high Jc can be obtained.
【０００５】[0005]
【発明が解決しようとする課題】上記のように、Ｂｉ系
の超電導体のＪｃを向上させるためには、機械的な圧縮
加工を加える必要があるが、従来はこの加工を熱処理時
に一軸プレスで行っているため、長さが数ｃｍのものし
か加工できず、長尺の線材を製造するには適さないとい
う問題があった。As described above, in order to improve the Jc of the Bi type superconductor, it is necessary to add mechanical compression processing. Conventionally, this processing is performed by a uniaxial press during heat treatment. Since it is carried out, there is a problem that it can be processed only for a length of several cm, which is not suitable for manufacturing a long wire.
【０００６】本発明は上記の問題を解決するためになさ
れたもので、熱処理の中間段階で冷間圧延加工を施すこ
とにより、高いＪｃ値を有する長尺のＢｉ系の酸化物超
電導線を製造する方法を提供することをその目的とす
る。The present invention has been made to solve the above-mentioned problems, and by performing cold rolling in the intermediate stage of heat treatment, a long Bi-based oxide superconducting wire having a high Jc value is manufactured. Its purpose is to provide a method of doing so.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明のＢｉ系酸化物超電導線の製造方法は、Ｂｉ
（Ｐｂ）−Ｓｒ−Ｃａ−Ｃａ−Ｏ系の酸化物超電導体を
構成する元素を含む原料粉末を金属管内に充填し、これ
に冷間加工を施して線条体を形成した後、超電導化合物
生成の熱処理を施して超電導線を製造する際に、熱処理
の中間段階で線条体に金属テープを介して冷間圧延加工
を施すものである。In order to achieve the above object, the method for producing a Bi-based oxide superconducting wire according to the present invention comprises:
(Pb) -Sr-Ca-Ca-O-based oxide A superconducting compound is prepared by filling a raw material powder containing an element forming an oxide superconductor into a metal tube and subjecting this to cold working to form a filament. When a superconducting wire is manufactured by applying a heat treatment for generation, a cold rolling process is performed on the filament body via a metal tape in an intermediate stage of the heat treatment.
【０００８】本発明のＢｉ系超電導体は、Ｂｉ：Ｓｒ：
Ｃａ：Ｃａ＝２：２：２：３の概略モル比からなる組
成、即ち（２２２３）相（以下同様）を基本とするもの
であるが、（２２１２）相あるいは、これらの化合物中
のＢｉの一部をＰｂに置換したものも当然含まれる。ま
た、原料粉末としては、超電導体を構成する元素を一以
上含む酸化物、炭酸塩、硝酸塩等の粉末や超電導組成に
配合された仮焼粉末が用いられ、これを充填する金属管
としては、高温で内部の超電導化合物と反応せず、加工
性の良好な材料であれば良いが、特にＡｇが実質的に高
温で酸素透過機能を有するため適している。The Bi-based superconductor of the present invention is Bi: Sr:
The composition is based on a composition having an approximate molar ratio of Ca: Ca = 2: 2: 2: 3, that is, a (2223) phase (the same applies hereinafter), but the (2212) phase or Bi in these compounds is Naturally, a part of Pb is replaced. Further, as the raw material powder, an oxide containing one or more elements constituting a superconductor, a carbonate, a powder of nitrate or the like or a calcined powder blended in a superconducting composition is used, and as a metal tube for filling the powder, A material that does not react with the internal superconducting compound at high temperature and has good workability may be used, but Ag is particularly suitable because it has an oxygen permeation function at substantially high temperature.
【０００９】この金属管内に原料粉末を充填した後、冷
間加工により形成された線条体に施される超電導化合物
生成の熱処理は、８２０〜８５０℃で５０〜２００時間
の条件で行うことが好ましい、この条件では（２２２
３）相が優先的に成長し、８５０℃を越えると（２２１
２）相が生成する。上記の金属テープとしては、ステン
レススチールやハステロイ等冷間圧延加工時に塑性変形
しない硬度を有し、かつ線条体と圧着しない材料が用い
られる。After the raw material powder is filled in the metal tube, the heat treatment for forming a superconducting compound applied to the filament formed by cold working may be performed at 820 to 850 ° C. for 50 to 200 hours. Preferred under these conditions is (222
3) When the phase grows preferentially and exceeds 850 ° C (221
2) A phase is formed. As the above-mentioned metal tape, a material such as stainless steel or Hastelloy that has a hardness that does not plastically deform during cold rolling and does not pressure-bond with the filament body is used.
【００１０】上記発明において、線条体をテープ状線材
に成形した後、熱処理の中間段階でテープ状線材の両側
に所定厚さの金属テープを介して所定の圧下率で冷間圧
延加工を施すことが好ましい。これは本願第２の発明と
して、Ｂｉ（Ｐｂ）−Ｓｒ−Ｃａ−Ｃａ−Ｏ系の酸化物
超電導体を構成する元素を含む原料粉末を金属管内に充
填し、これに冷間加工を施してテープ状線材に成形した
後、超電導化合物生成の熱処理を施して超電導線を製造
する方法において、熱処理の中間段階で、テープ状線材
の１〜５倍の厚さの金属テープを前記テープ状線材の両
側に介して、テープ状線材に２０％以下の圧下率で冷間
圧延加工を施す製造方法として記述される。In the above invention, after the filamentous body is formed into a tape-shaped wire, cold rolling is performed on both sides of the tape-shaped wire through a metal tape having a predetermined thickness at a predetermined reduction rate in an intermediate stage of heat treatment. Preferably. This is the second invention of the present application, in which a raw material powder containing an element constituting a Bi (Pb) -Sr-Ca-Ca-O-based oxide superconductor is filled in a metal tube and subjected to cold working. In a method for producing a superconducting wire by subjecting a tape-shaped wire to a heat treatment for forming a superconducting compound, a metal tape having a thickness of 1 to 5 times that of the tape-shaped wire is formed at an intermediate stage of the heat treatment. It is described as a manufacturing method in which a tape-shaped wire material is cold-rolled at a rolling reduction of 20% or less through both sides.
【００１１】即ち、前述のように、熱処理時に一軸方向
の圧力を加えることによりＢｉ系の超電導体のＪｃが向
上するが、これは熱処理の中間段階でテープ状線材の厚
さ方向に冷間圧延加工を施し、この際にテープ状線材の
１〜５倍の厚さの金属テープをテープ状線材の両側に介
することにより、冷間圧延加工時の圧縮応力以外の剪断
応力等を金属テープに吸収することができ、テープ状線
材に必要な圧力を加えることができる。金属テープの厚
さがテープ状線材の厚さの１倍未満であると、圧縮応力
以外の剪断応力等がテープ状線材に加わり特性が低下
し、一方、５倍を越えると十分な圧縮効果が得られな
い。That is, as described above, the Jc of the Bi type superconductor is improved by applying the uniaxial pressure during the heat treatment, which is the cold rolling in the thickness direction of the tape-shaped wire in the intermediate stage of the heat treatment. By applying a metal tape having a thickness of 1 to 5 times that of the tape-shaped wire on both sides of the tape-shaped wire, the metal tape absorbs shear stress other than compressive stress during cold rolling. It is possible to apply the required pressure to the tape-shaped wire. If the thickness of the metal tape is less than 1 time the thickness of the tape-shaped wire, shear stress other than compressive stress will be applied to the tape-shaped wire and the characteristics will deteriorate. On the other hand, if it exceeds 5 times, a sufficient compression effect will be obtained. I can't get it.
【００１２】また、熱処理の中間段階で施される冷間圧
延加工の圧下率が大きくなると、テープ状線材の伸びが
大きくなって十分な圧縮効果が得られないため、圧下率
を２０％以下で冷間圧延加工することが好ましい。この
冷間圧延加工時の線速は、０．１〜５ｍ／ｍｉｎの範囲
が好ましく、線速が０．１ｍ／ｍｉｎ未満では圧縮力が
十分にテープ状線材に伝わらず、また線速が５ｍ／ｍｉ
ｎを越えると、テープ状線材と金属テープが同時に圧延
ロールに咬み込まれて均一な加工ができず、その結果不
均質な部分を生じ易くなる。Further, if the reduction ratio of the cold rolling process performed in the intermediate stage of the heat treatment increases, the elongation of the tape-shaped wire increases and a sufficient compression effect cannot be obtained, so that the reduction ratio is 20% or less. Cold rolling is preferred. The linear velocity during the cold rolling is preferably in the range of 0.1 to 5 m / min. If the linear velocity is less than 0.1 m / min, the compressive force is not sufficiently transmitted to the tape-shaped wire and the linear velocity is 5 m. / Mi
When n is exceeded, the tape-shaped wire and the metal tape are simultaneously bitten by the rolling roll and uniform processing cannot be performed, and as a result, an inhomogeneous portion is likely to occur.
【００１３】[0013]
【作用】本発明においては、成形後に施される超電導化
合物生成の熱処理の中間段階で、線条体に金属テープを
介して冷間圧延加工を施すことにより、線条体に必要な
圧縮応力を加えることができ、板状組織を有するＢｉ系
超電導体の結晶の配向性を連続的に向上させることがで
きる。In the present invention, the linear body is cold-rolled through the metal tape in the intermediate stage of the heat treatment for forming the superconducting compound after forming, so that the compressive stress required for the linear body is reduced. It can be added, and the crystal orientation of the Bi-based superconductor having a plate-like structure can be continuously improved.
【００１４】[0014]
【実施例】以下本発明の実施例および比較例について説
明する。 実施例 Ｂｉ2 Ｏ3 、ＰｂＯ、ＳｒＣＯ3 、ＣａＣＯ3 およびＣ
ｕＯの各粉末をＢｉ：Ｐｂ：Ｓｒ：Ｃａ：Ｃｕ＝１．８
５：０．２５：２．００：２．００：３．００の比率に
秤量して十分に混合した後、固相反応法により仮焼粉を
製造した。EXAMPLES Examples and comparative examples of the present invention will be described below. Example Bi 2 O 3 , PbO, SrCO 3 , CaCO 3 and C
Each powder of uO was Bi: Pb: Sr: Ca: Cu = 1.8.
After being weighed in a ratio of 5: 0.25: 2.00: 2.00: 3.00 and thoroughly mixed, a calcined powder was produced by a solid-phase reaction method.
【００１５】この仮焼粉を外径φ７ｍｍの銀パイプ中に
充填した後、冷間で線引加工および圧延加工を施して厚
さ０．１５ｍｍ、幅３．５ｍｍのテープ状線材に成形し
て、８４０℃で５０時間の熱処理を施し、次いでＳＵＳ
４３０テープをスペーサテープとしてテープ状線材の両
側に配置して冷間圧延加工した後、さらに８４０℃で５
０時間の熱処理を施した。After filling the calcined powder into a silver pipe having an outer diameter of 7 mm, the wire is cold drawn and rolled to form a tape-shaped wire having a thickness of 0.15 mm and a width of 3.5 mm. , Heat treatment at 840 ℃ for 50 hours, then SUS
430 tape is used as a spacer tape on both sides of the tape-shaped wire and cold-rolled.
Heat treatment was performed for 0 hours.
【００１６】このようにして得られた長さ３０００ｍｍ
の超電導テープのＪｃ（７７Ｋ）の測定結果を、冷間圧
延加工の圧下率、圧延速度、スペーサテープの厚さとと
もに表１に示す。A length of 3000 mm thus obtained
Table 1 shows the Jc (77K) measurement results of the superconducting tape of No. 1, together with the rolling reduction of the cold rolling, the rolling speed, and the thickness of the spacer tape.
【００１７】[0017]
【表１】 [Table 1]
【００１８】比較例 実施例でテープ状線材に施した熱処理の中間段階におけ
る冷間圧延加工の代わりに、長さ３０ｍｍのテープ状線
材に一軸プレス加工を施し、他は実施例と同様の方法に
より短尺の超電導テープを製造した この超電導テープのＪｃ（７７Ｋ）の測定結果を、一軸
プレス加工の圧下率とともに表１に示した。Comparative Example Instead of the cold rolling process in the intermediate stage of the heat treatment applied to the tape-shaped wire rods in the examples, the tape-shaped wire rods having a length of 30 mm were subjected to uniaxial press working, and otherwise the same as in the examples. A short superconducting tape was produced. The results of measurement of Jc (77K) of this superconducting tape are shown in Table 1 together with the rolling reduction of uniaxial pressing.
【００１９】[0019]
【発明の効果】以上述べたように、本発明のＢｉ系超電
導線の製造方法によれば、成形後に施される超電導化合
物生成の熱処理の中間段階で、冷間圧延加工を施すこと
により、結晶の配向性を連続的に向上させることがで
き、一軸プレス加工による結果と同様に高いＪｃ値を有
する長尺の超電線を製造することができる。As described above, according to the method for producing a Bi-based superconducting wire of the present invention, by performing cold rolling in the intermediate stage of the heat treatment for forming the superconducting compound after forming, the crystal is formed. Can be continuously improved, and a long super electric wire having a high Jc value similar to the result obtained by the uniaxial press working can be manufactured.
Claims (2)
酸化物超電導体を構成する元素を含む原料粉末を金属管
内に充填し、これに冷間加工を施して線条体を形成した
後、超電導化合物生成の熱処理を施して超電導線を製造
する方法において、前記熱処理の中間段階で前記線条体
に金属テープを介して冷間圧延加工を施すことを特徴と
するＢｉ系酸化物超電導線の製造方法。1. A metal tube is filled with a raw material powder containing an element constituting a Bi (Pb) -Sr-Ca-Ca-O-based oxide superconductor, and this is subjected to cold working to form a linear body. In the method for producing a superconducting wire by subjecting it to a heat treatment for forming a superconducting compound after formation, the linear body is cold-rolled via a metal tape in an intermediate step of the heat treatment, which is a Bi-based oxidation. Method for manufacturing superconducting wire.
酸化物超電導体を構成する元素を含む原料粉末を金属管
内に充填し、これに冷間加工を施してテープ状線材に成
形した後、超電導化合物生成の熱処理を施して超電導線
を製造する方法において、前記熱処理の中間段階で、前
記テープ状線材の１〜５倍の厚さの金属テープを前記テ
ープ状線材の両側に介して、前記テープ状線材に２０％
以下の圧下率で冷間圧延加工を施すことを特徴とするＢ
ｉ系酸化物超電導線の製造方法。2. A raw material powder containing an element constituting a Bi (Pb) -Sr-Ca-Ca-O-based oxide superconductor is filled in a metal tube, and cold working is performed on the raw material powder to obtain a tape-shaped wire. In a method of manufacturing a superconducting wire by subjecting it to a heat treatment for forming a superconducting compound after molding, in an intermediate step of the heat treatment, a metal tape having a thickness of 1 to 5 times that of the tape-shaped wire is provided on both sides of the tape-shaped wire. 20% to the tape-shaped wire through
B which is characterized by being subjected to cold rolling at the following reduction ratio
A method for producing an i-based oxide superconducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4001562A JPH05182539A (en) | 1992-01-08 | 1992-01-08 | Manufacture of bismuth group oxide superconductive wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4001562A JPH05182539A (en) | 1992-01-08 | 1992-01-08 | Manufacture of bismuth group oxide superconductive wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05182539A true JPH05182539A (en) | 1993-07-23 |
Family
ID=11504968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4001562A Withdrawn JPH05182539A (en) | 1992-01-08 | 1992-01-08 | Manufacture of bismuth group oxide superconductive wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05182539A (en) |
-
1992
- 1992-01-08 JP JP4001562A patent/JPH05182539A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990408 |