JPH04123718A - Manufacture of superconducting wire rod - Google Patents
Manufacture of superconducting wire rodInfo
- Publication number
- JPH04123718A JPH04123718A JP2245246A JP24524690A JPH04123718A JP H04123718 A JPH04123718 A JP H04123718A JP 2245246 A JP2245246 A JP 2245246A JP 24524690 A JP24524690 A JP 24524690A JP H04123718 A JPH04123718 A JP H04123718A
- Authority
- JP
- Japan
- Prior art keywords
- heat treatment
- powder
- superconducting wire
- tape
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000003365 glass fiber Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000002887 superconductor Substances 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 12
- 229910052797 bismuth Inorganic materials 0.000 claims description 10
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical group [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 7
- 229910014454 Ca-Cu Inorganic materials 0.000 claims description 4
- 229910052745 lead Inorganic materials 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 abstract description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052709 silver Inorganic materials 0.000 abstract description 4
- 239000004332 silver Substances 0.000 abstract description 4
- 239000000919 ceramic Substances 0.000 abstract description 3
- 238000011282 treatment Methods 0.000 abstract description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 1
- 229910010272 inorganic material Inorganic materials 0.000 abstract 1
- 239000011147 inorganic material Substances 0.000 abstract 1
- 238000005491 wire drawing Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052716 thallium Inorganic materials 0.000 description 2
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 231100001231 less toxic Toxicity 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 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)
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明は、超電導線材の製造方法に関するもので、特
に、酸化物超電導体を備える超電導線材の製造に適した
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a superconducting wire, and particularly to a method suitable for manufacturing a superconducting wire comprising an oxide superconductor.
［従来の技術〕
近年、より高い臨界温度を示す超電導体として、セラミ
ックス系、すなわち酸化物系の超電導体か注目されてい
る。なかでも、イツトリウム系か９０に、ビスマス系が
ｌｌ０Ｋ、タリウム系が１２０に程度の高い臨界温度を
示し、実用化が期待されている。たとえば、このような
超電導体を、ケーブル、ブスバー、パワーリード、コイ
ルなどに応用することが考えられている。[Prior Art] In recent years, ceramic-based, ie, oxide-based superconductors have attracted attention as superconductors exhibiting higher critical temperatures. Among these, yttrium-based materials exhibit high critical temperatures of about 90K, bismuth-based materials have critical temperatures of about 100K, and thallium-based materials have high critical temperatures of about 120K, and are expected to be put to practical use. For example, it is being considered to apply such superconductors to cables, busbars, power leads, coils, etc.
［発明が解決しようとする課題］
しかしなうくら、これらの超電導体を上述したような用
途に応用としようとする場合、長尺で安定した特性の超
電導線材を得る必要かある。[Problems to be Solved by the Invention] However, if these superconductors are to be applied to the above-mentioned uses, it is necessary to obtain long superconducting wires with stable characteristics.
それゆえに、この発明の目的は、このように長尺で安定
した特性の超電導線材を得ることができる、超電導線材
の製造方法を提供しようとすることである。Therefore, an object of the present invention is to provide a method for manufacturing a superconducting wire that can obtain such a long superconducting wire with stable characteristics.
［課題を解決するための手段〕
この発明は、超電導体となる粉末を金属被覆して塑性加
工し、熱処理を施すステップを備える、超電導線材の製
造方法に向けられるものであって、上述した技術的課題
を解決するため、テープ状の素線材を複数枚重ね合わせ
て１度目の熱処理を行ない、しかる後、塑性加工し、２
度目の熱処理を施す、各ステップを備えるとともに、少
なくとも前記２度目の熱処理ステップの前に、前記素線
材を重ね合わせたものを無機物質で被覆するステップを
備えることを特徴としている。[Means for Solving the Problems] The present invention is directed to a method for manufacturing a superconducting wire, which includes steps of metal-coating powder to become a superconductor, subjecting it to plastic working, and subjecting it to heat treatment. In order to solve this problem, multiple pieces of tape-shaped wire material were stacked together and heat treated for the first time, and then plastic processed and
The present invention is characterized by comprising steps of performing a second heat treatment, and at least before the second heat treatment step, a step of coating the stacked wire material with an inorganic substance.
好ましくは、前記無機物質で被覆するステップは、前記
１度目の熱処理ステップの前に実施される。この場合、
１度目の熱処理ステップを終えたとき、無機物質が取り
除かれる場合には、塑性加工した後、２度目の熱処理ス
テップの前に、再度、無機物質で被覆するステップが実
施される。また、無機物質で被覆した状態で、１度目の
熱処理を行なった後、塑性加工する際、たとえばロール
によ名圧延を用いずに、静水圧を用いる場合には、無機
物質を取り除く必要がない。したがって、同じ無機物質
で被覆されたまま、２度目の熱処理を施すこともできる
。Preferably, the step of coating with an inorganic substance is performed before the first heat treatment step. in this case,
If the inorganic substance is removed after the first heat treatment step, a step of coating with the inorganic substance is performed again after plastic working and before the second heat treatment step. In addition, when plastic working is performed after the first heat treatment while coated with an inorganic substance, for example, if hydrostatic pressure is used instead of rolling with rolls, there is no need to remove the inorganic substance. . Therefore, a second heat treatment can be performed while still being coated with the same inorganic substance.
上述した無機物質としては、たとえば、ガラス繊維また
はその編んだものが用いられる。この場合、ガラス繊維
は、ＳｉＯ２を成分として５０％以上含有するものが好
ましい。たとえば、ガラス繊維としては、ＳｉＯ２が１
００％の石英ファイバ、Ｓ ｉ ０２が６５％、Ａｌ２
Ｏ３が２３％、Ｍ２Ｃが１１％、およびその他不純物を
含むファイバを用いることが、耐熱性、および取扱い性
の点で好ましい。As the above-mentioned inorganic substance, for example, glass fiber or a knitted material thereof is used. In this case, the glass fiber preferably contains 50% or more of SiO2 as a component. For example, as glass fiber, SiO2 is 1
00% quartz fiber, 65% S i 02, Al2
It is preferable to use a fiber containing 23% O3, 11% M2C, and other impurities in terms of heat resistance and handleability.
なお、無機物質として電気絶縁性のものが用いられると
、熱処理後において特別な絶縁被覆処理を行なう必要が
なく、そのような処理時の取扱いによる超電導特性の劣
化を防止できる。Note that when an electrically insulating inorganic substance is used, there is no need to perform a special insulation coating treatment after heat treatment, and deterioration of superconducting properties due to handling during such treatment can be prevented.
この発明は、高温超電導体として呼ばれる酸化物超電導
体を備える超電導線材の製造方法に有利に適用される。The present invention is advantageously applied to a method of manufacturing a superconducting wire comprising an oxide superconductor called a high-temperature superconductor.
高温超電導体としては、たとえば、イツトリウム系、ビ
スマス系、タリウム系のものがあるが、臨界温度および
臨界電流密度が高いこと、毒性が少ないこと、および希
土類元素を必要としない点において、ビスマス系が好ま
しい。ビスマス系超電導体を用いる場合、Ｂ１−Ｓｒ−
Ｃａ−Ｃｕまたは（Ｂｉ、Ｐｂ）−Ｓｒ−Ｃａ−ＣＵに
おいて２２２３組成を基本とするものが好ましく、この
場合には、金属被覆される粉末には、２２１２相を主体
とする超電導相と非超電導相とからなるものが用いられ
る。High-temperature superconductors include, for example, those based on yttrium, bismuth, and thallium, but bismuth is superior in that it has a high critical temperature and critical current density, is less toxic, and does not require rare earth elements. preferable. When using a bismuth-based superconductor, B1-Sr-
Ca-Cu or (Bi, Pb)-Sr-Ca-CU based on the 2223 composition is preferable, and in this case, the powder to be metal coated contains a superconducting phase mainly composed of the 2212 phase and a non-superconducting phase. A structure consisting of two phases is used.
また、粉末は、金属被覆される前に、脱ガス処理される
ことが好ましい。It is also preferred that the powder is degassed before being metal coated.
この発明において用いられるテープ状の素線材は、金属
被覆されているが、このような金属被覆は、得られた超
電導線材を安定化させる機能を有する。金属被覆のため
の金属としては、超電導体と反応せず、加工性が良好で
、安定化材として機能するような比抵抗の小さなものが
適しており、たとえば、銀または銀合金が用いられる。The tape-shaped wire used in this invention is coated with metal, and such metal coating has a function of stabilizing the obtained superconducting wire. As the metal for the metal coating, a metal that does not react with the superconductor, has good workability, and has a low resistivity so as to function as a stabilizing material is suitable. For example, silver or a silver alloy is used.
このような金属は、超電導体を被覆するように用いられ
るが、超電導体と他の金属被覆との間の中間層として用
いられてもよい。中間層として用いられる場合には、そ
の上に、別の金属が被覆されるが、この金属としては、
たとえば、銅、アルミニウム、またはそれらの合金が用
いられる。Such metals are used to coat superconductors, but may also be used as intermediate layers between superconductors and other metal coatings. When used as an intermediate layer, another metal is coated on top of it, and this metal includes:
For example, copper, aluminum, or an alloy thereof is used.
［発明の作用および効果］
この発明によれば、少なくとも２度目の熱処理が、無機
物質で押さえつけられたまま行なわれるので、金属被覆
内の超電導体から放出されるガスによる膨張現象が抑え
られ、それによって、長尺にわたって、超電導特性の劣
化がなく、安定した超電導特性および高い臨界電流密度
を有する超電導線材を得ることかできる。[Operations and Effects of the Invention] According to the present invention, at least the second heat treatment is performed while being pressed by the inorganic substance, so that the expansion phenomenon due to the gas released from the superconductor in the metal coating is suppressed, and the Accordingly, it is possible to obtain a superconducting wire having stable superconducting properties and high critical current density without deterioration of superconducting properties over a long length.
また、上述した効果は、１度目の熱処理ステップの前に
、無機物質で被覆するステップを実施し、それによって
１度目および２度目の熱処理の双方において、無機物質
で被覆しておくと、−層顕著になる。In addition, the above-mentioned effect can be obtained by performing a step of coating with an inorganic substance before the first heat treatment step, and thereby coating with the inorganic substance in both the first and second heat treatments. become noticeable.
また、テープ状の素線材を複数枚重ね合わせることによ
り、高い臨界電流密度および優れた機械的特性を確保し
ながら、個々のテープ状の素線材に対しては、強加工を
施すことができるので、層高い臨界電流密度を得ること
ができる。In addition, by stacking multiple tape-shaped wire materials, it is possible to apply strong processing to each individual tape-shaped wire material while ensuring high critical current density and excellent mechanical properties. , a high critical current density can be obtained in the layer.
このようにして得られた超電導線材は、テープ状の形態
をなしており、ケーブル、ブスバー、パワーリード、コ
イルなどに用いることができる。The superconducting wire thus obtained is in the form of a tape and can be used for cables, busbars, power leads, coils, etc.
この場合、得られた超電導線材は、歪み０１３％以下（
歪み＝超電導線材の厚み／曲げ直径）で取扱うことが望
ましい。In this case, the obtained superconducting wire has a strain of 013% or less (
It is desirable to handle the strain as follows: strain = thickness of superconducting wire/bending diameter).
また、金属被覆される粉末に対して、金属被覆される前
に、脱ガス処理しておくと、前述したような膨張を防止
するのにさらに効果的であり、そのため、長さ方向にわ
たって均一な特性を与えることができる超電導線材を得
るのに一層貢献できる。In addition, degassing the powder to be metallized before metallization is more effective in preventing the expansion described above, so that the powder is uniformly coated along its length. This can further contribute to the creation of superconducting wires that can provide specific properties.
また、この発明は、特に、ビスマス系超電導体を含む超
電導線材の製造方法に適用されると効果的である。この
場合、ビスマス系超電導体は、Ｂ１−５ ｒ−Ｃａ−Ｃ
ｕまたは（Ｂｉ、Ｐｂ） −Ｓｒ−Ｃａ−Ｃｕの組成に
おいて２２２３組成を有しており、粉末としては、２２
１２相を主体とする超電導相および非超電導相からなる
ものを用いると、特に優れた特性を示す。Further, the present invention is particularly effective when applied to a method of manufacturing a superconducting wire containing a bismuth-based superconductor. In this case, the bismuth-based superconductor is B1-5 r-Ca-C
u or (Bi, Pb) -Sr-Ca-Cu has a composition of 2223, and as a powder, it has a composition of 2223.
Particularly excellent characteristics are exhibited when a material consisting of a superconducting phase mainly composed of 12 phases and a non-superconducting phase is used.
［実施例］ 実施例Ｉ Ｂｉ：Ｐｂ：Ｓｒ：Ｃａ：Ｃｕ＝１．８０：Ｏ。[Example] Example I Bi:Pb:Sr:Ca:Cu=1.80:O.
４２コ２．００：２．２２ご３．００の組成を持つよう
に、各々の元素を含む酸化物または炭酸塩を混合し、熱
処理により、Ｂｉ＋Ｐｂ：Ｓｒ：Ｃａ：Ｃｕの比率がほ
ぼ２＋２：１：２となっている２２１２相と非超電導相
とからなる粉末を準備した。Oxides or carbonates containing each element are mixed to have a composition of 2.00:2.22:3.00, and by heat treatment, the ratio of Bi+Pb:Sr:Ca:Cu is approximately 2+2: A powder consisting of a 2212 phase and a non-superconducting phase in a ratio of 1:2 was prepared.
この粉末を、１０Ｔｏｒｒの減圧雰囲気で、７００℃、
３０分間の脱ガス処理した。This powder was heated at 700°C in a reduced pressure atmosphere of 10 Torr.
Degassing was performed for 30 minutes.
得られた粉末を、外径１２ｍｍ、内径８ｍｍの銀パイプ
で被覆し、外径１ｍｍになるまで伸線加工し、１回の圧
延で０．１７ｍｍの厚みになるまで圧延加工した。The obtained powder was covered with a silver pipe having an outer diameter of 12 mm and an inner diameter of 8 mm, and wire-drawn to an outer diameter of 1 mm, and rolled to a thickness of 0.17 mm in one rolling process.
このようにして得られたテープ状の素線材を５枚重ね合
わせたものを、ＳｉＯ□が６５％、Ａｔ２０３が２３％
、Ｍ ｇ Ｏが１１％、およびその他不純物を含むガラ
ス繊維の編組テープ（幅５ｍｍ。A stack of five tape-shaped wire materials obtained in this way is made up of 65% SiO□ and 23% At203.
, 11% M g O, and other impurities (width 5 mm).
厚み０．１４ｍｍ）で被覆した。It was coated with a thickness of 0.14 mm).
これを、８４５℃で５０時間熱処理し、その後、ガラス
繊維を取り除き、次いで、１１．８％の加工度で圧延し
、５０ｍの線材を得た。This was heat treated at 845° C. for 50 hours, and then the glass fibers were removed, and then rolled at a working ratio of 11.8% to obtain a 50 m wire rod.
次に、再度、同じ編組テープでこの線材を被覆した後、
直径５００ｍｍのアルミナ／シリカ製セラミックス円筒
に巻付け、８４０℃で５０時間熱処理した。Next, after covering this wire with the same braided tape again,
It was wound around an alumina/silica ceramic cylinder with a diameter of 500 mm, and heat treated at 840° C. for 50 hours.
このように、円筒に巻いたままで、得られた線材の液体
窒素温度での臨界電流および臨界電流密度を測定したと
ころ、それぞれ、６０Ａおよび１２００ＯＡ／ｃｍ２で
あった。また、得られた線材の取扱い性は良好であった
。As described above, the critical current and critical current density of the obtained wire at liquid nitrogen temperature were measured while being wound into a cylinder, and found to be 60 A and 1200 OA/cm 2 , respectively. Moreover, the handleability of the obtained wire rod was good.
実施例２
Ｂｉ：Ｐｂ：Ｓｒ：Ｃａ：Ｃｕ＝１．７８：０゜４０・
１．９７：２．２０：３．０３の組成を持つように、各
々の元素を含む酸化物または炭酸塩を混合し、熱処理に
より、２２１２相と非超電導相とからなる粉末を準備し
た。Example 2 Bi:Pb:Sr:Ca:Cu=1.78:0°40・
Oxides or carbonates containing the respective elements were mixed to have a composition of 1.97:2.20:3.03, and a powder consisting of a 2212 phase and a non-superconducting phase was prepared by heat treatment.
この粉末を、１２Ｔｏ ｒ ｒの減圧雰囲気で、７００
℃、１時間の脱ガス処理した。This powder was heated to 700 ml in a reduced pressure atmosphere of 12 Torr.
It was degassed at ℃ for 1 hour.
得られた粉末を、外径１２ｍｍ、内径８ｍｍの銀パイプ
で被覆し、外径１ｍｍになるまで伸線加工し、次いで、
１回の圧延で０．１７ｍｍの厚みになるまで圧延加工し
た。The obtained powder was covered with a silver pipe having an outer diameter of 12 mm and an inner diameter of 8 mm, and wire-drawn to an outer diameter of 1 mm, and then
Rolling was performed until the thickness reached 0.17 mm in one rolling.
このようにして得られたテープ状の素線材を１０枚重ね
合わせ、石英ガラス編組テープ（幅１０ｍｍ、厚み０．
２ｍｍ）で被覆し、８５０℃で５０時間熱処理し、その
後、石英ガラス編組テープを除去した。次いで、１５％
の加工度で圧延加工し、２０ｍの線材を得た。Ten pieces of the tape-shaped wire material obtained in this way were stacked together to form a quartz glass braided tape (width 10 mm, thickness 0.5 mm).
2 mm), heat treated at 850° C. for 50 hours, and then the quartz glass braided tape was removed. Then 15%
A wire rod of 20 m was obtained by rolling at a working degree of .
この線材を、再度、同し石英ガラス編組テープ被覆し、
直径７５０ｍｍのステレンス管にコイル巻きし、８４５
℃で５０時間熱処理した。This wire was again covered with the same quartz glass braided tape,
845 coil wound around a stainless steel tube with a diameter of 750 mm.
Heat treatment was performed at ℃ for 50 hours.
得られた線材を、液体窒素温度で評価したところ、取扱
い性が良好で、臨界電流が１４ＯＡであり、臨界電流密
度か１４８００Ａ／ｃｍ２であった。When the obtained wire was evaluated at liquid nitrogen temperature, it was found to have good handling properties, a critical current of 14 OA, and a critical current density of 14,800 A/cm2.
特許出願人 住友電気工業株式会社Patent applicant: Sumitomo Electric Industries, Ltd.
Claims (6)
熱処理を施すステップを備える、超電導線材の製造方法
において、 テープ状の素線材を複数枚重ね合わせて１度目の熱処理
を行ない、しかる後、塑性加工し、２度目の熱処理を施
す、各ステップを備えるとともに、少なくとも前記２度
目の熱処理ステップの前に、前記素線材を重ね合わせた
ものを無機物質で被覆するステップを備える、 ことを特徴とする、超電導線材の製造方法。(1) Powder that will become a superconductor is coated with metal and plastic processed,
A method for manufacturing a superconducting wire comprising a step of applying heat treatment, comprising the steps of stacking a plurality of tape-shaped wire materials, performing a first heat treatment, then plastic working, and performing a second heat treatment. A method for manufacturing a superconducting wire, further comprising: at least before the second heat treatment step, coating the stacked wires with an inorganic substance.
質で被覆するステップが実施される、請求項１に記載の
超電導線材の製造方法。(2) The method for manufacturing a superconducting wire according to claim 1, wherein a step of coating with the inorganic substance is performed before the first heat treatment step.
のである、請求項１または２に記載の超電導線材の製造
方法。(3) The method for manufacturing a superconducting wire according to claim 1 or 2, wherein the inorganic substance is glass fiber or a knitted material thereof.
％以上含有する、請求項３に記載の超電導線材の製造方
法。(4) The glass fiber contains 50% SiO_2 as a component.
% or more, the method for manufacturing a superconducting wire according to claim 3.
つＢｉ−Ｓｒ−Ｃａ−Ｃｕまたは（Ｂｉ，Ｐｂ）−Ｓｒ
−Ｃａ−Ｃｕにおいて２２２３組成を基本とするもので
あり、前記粉末は、２２１２相を主体とする超電導相と
非超電導相とからなる、請求項１ないし４のいずれかに
記載の超電導線材の製造方法。(5) The superconductor is a bismuth-based superconductor, and Bi-Sr-Ca-Cu or (Bi, Pb)-Sr
- Manufacturing a superconducting wire according to any one of claims 1 to 4, wherein the powder is based on a 2223 composition in Ca-Cu, and the powder consists of a superconducting phase mainly composed of a 2212 phase and a non-superconducting phase. Method.
れる、請求項１ないし５のいずれかに記載の超電導線材
の製造方法。(6) The method for manufacturing a superconducting wire according to any one of claims 1 to 5, wherein the powder is degassed before being coated with metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2245246A JPH04123718A (en) | 1990-09-14 | 1990-09-14 | Manufacture of superconducting wire rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2245246A JPH04123718A (en) | 1990-09-14 | 1990-09-14 | Manufacture of superconducting wire rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04123718A true JPH04123718A (en) | 1992-04-23 |
Family
ID=17130835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2245246A Pending JPH04123718A (en) | 1990-09-14 | 1990-09-14 | Manufacture of superconducting wire rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04123718A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993002460A1 (en) * | 1991-07-24 | 1993-02-04 | Sumitomo Electric Industries, Ltd. | Method for manufacturing superconductive wire material of bismuth based oxide |
| JP2020136586A (en) * | 2019-02-22 | 2020-08-31 | 株式会社日立製作所 | Superconducting coil conductor and manufacturing method of superconducting coil conductor |
-
1990
- 1990-09-14 JP JP2245246A patent/JPH04123718A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993002460A1 (en) * | 1991-07-24 | 1993-02-04 | Sumitomo Electric Industries, Ltd. | Method for manufacturing superconductive wire material of bismuth based oxide |
| JP2020136586A (en) * | 2019-02-22 | 2020-08-31 | 株式会社日立製作所 | Superconducting coil conductor and manufacturing method of superconducting coil conductor |
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