JPS63292520A - Superconductive material - Google Patents
Superconductive materialInfo
- Publication number
- JPS63292520A JPS63292520A JP62129503A JP12950387A JPS63292520A JP S63292520 A JPS63292520 A JP S63292520A JP 62129503 A JP62129503 A JP 62129503A JP 12950387 A JP12950387 A JP 12950387A JP S63292520 A JPS63292520 A JP S63292520A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- wire material
- oxidizing substance
- wire
- oxide superconductor
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title abstract description 13
- 239000007800 oxidant agent Substances 0.000 claims abstract description 16
- 239000002887 superconductor Substances 0.000 claims abstract description 15
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 15
- 239000001301 oxygen Substances 0.000 abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 abstract description 15
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 5
- 239000000956 alloy Substances 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 5
- 239000010931 gold Substances 0.000 abstract description 5
- 230000001590 oxidative effect Effects 0.000 abstract description 5
- 239000011521 glass Substances 0.000 abstract description 3
- 229910052737 gold Inorganic materials 0.000 abstract description 3
- 229910052763 palladium Inorganic materials 0.000 abstract description 3
- 229910052697 platinum Inorganic materials 0.000 abstract description 3
- -1 etc. Substances 0.000 abstract description 2
- 229910052709 silver Inorganic materials 0.000 abstract description 2
- 239000004332 silver Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 28
- 238000004544 sputter deposition Methods 0.000 description 9
- 239000003365 glass fiber Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910002482 Cu–Ni Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical group [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
- 229910052727 yttrium 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
Abstract
Description
この発明は、超電導マグネットコイル、超電導パワー伝
送などに用いられる超電導線材に関する。The present invention relates to a superconducting wire used for superconducting magnet coils, superconducting power transmission, etc.
従来の超電導線材は超電導材料を単に細い丸棒状とした
ものであり、超電導材料のアモルファス金属を溶融状態
で押し出し成型した後急冷し、酸素雰囲気で熱処理して
作る。しかし、このような超電導線材では、細いものを
作ることが困難であったり、十分な可撓性を得ることが
難しい。
そこで、第４図に示すように、ガラスファイバ３を支持
体とし、その表面に酸化物超電導層２を形成した、超電
導線材が考えられている。Conventional superconducting wires are simply made of superconducting material in the shape of a thin round rod, and are made by extruding superconducting amorphous metal in a molten state, rapidly cooling it, and heat-treating it in an oxygen atmosphere. However, with such superconducting wires, it is difficult to make thin ones or to obtain sufficient flexibility. Therefore, as shown in FIG. 4, a superconducting wire material is being considered in which a glass fiber 3 is used as a support and an oxide superconducting layer 2 is formed on the surface thereof.
ところで、このガラスファイバ３上の酸化物超電導層２
はスパッタ法やＣＶＤ法などで形成されるが、高い特性
を得るためにコーティングの後反応熱処理（たとえば９
００℃で１〜３時間）を受けることが多い。その際、酸
素雰囲気中で熱処理することにより、酸化物超電導層２
の表面は必要な酸素量が確保されるが、ガラスファイバ
３に接している部分では、酸化物超電導層２中の酸素か
ガラスに吸着されてしまい、第５図に示すように脱酸素
領域２１が形成される。
すると、一般に酸化物導電体では酸素が重要な役割を果
たしているのて、脱酸素領域２１において十分な酸素量
が確保されない場合には、臨界温度、臨界電流などの超
電導特性が低くなり、極端な場合には絶縁層となってし
まう。
この発明は、酸素量の低下を防ぎ、超電導特性の劣化が
生じないように改善した、超電導線材を提供することを
目的とする。By the way, the oxide superconducting layer 2 on this glass fiber 3
is formed by sputtering, CVD, etc., but in order to obtain high properties, post-coating reaction heat treatment (for example,
00°C for 1 to 3 hours). At that time, the oxide superconducting layer 2 is heat-treated in an oxygen atmosphere.
The required amount of oxygen is secured on the surface of the glass fiber 3, but in the portion in contact with the glass fiber 3, the oxygen in the oxide superconducting layer 2 is adsorbed by the glass, and as shown in FIG. is formed. Therefore, since oxygen generally plays an important role in oxide conductors, if a sufficient amount of oxygen is not secured in the deoxidizing region 21, superconducting properties such as critical temperature and critical current will decrease, leading to extreme In some cases, it becomes an insulating layer. An object of the present invention is to provide a superconducting wire that is improved so as to prevent a decrease in oxygen content and prevent deterioration of superconducting properties.
この発明による超電導線材は、非酸化性物質の線材と、
該非酸化性物質線材の周囲を被覆する酸化物超電導体の
層とからなる。The superconducting wire according to the present invention includes a wire made of a non-oxidizing substance,
and an oxide superconductor layer surrounding the non-oxidizing material wire.
【作 用】
非酸化性物質の線材の上に酸化物超電導体層が形成され
ており、この線材が超電導体の支持体となる。そして、
この支持体たる線材は非酸化性物質からなるので、酸化
物超電導体層中の酸素がガラスなどによって奪われるこ
とがない。その結果、酸化物超電導体の層において十分
な酸素量が確保でき、臨界温度や臨界電流などの超電導
特性の劣化を防ぐことができる。
この非酸化性物質としては、銀（Ａｇ）、金（Ａｕ）、
白金（ｐｔ）、パラジウム（Ｐｄ）などの貴金属あるい
はこれらをベースとした合金などを用いることができる
。
これに対して、通常の金属材料、たとえば銅、銅合金（
Ｃｕ−Ｎｉ、Ｃｕ−８ｎなど）、ステンレス鋼（ＳＵＳ
３０４，５ＵＳ３１６など）やＮｂ、Ｍｏ、Ｔａなどの
高融点金属等はほとんど酸化性を有しており、特に高温
状態では酸化性が強まるので、このような用途には使用
できない。[Function] An oxide superconductor layer is formed on a wire made of a non-oxidizing substance, and this wire serves as a support for the superconductor. and,
Since the wire serving as the support is made of a non-oxidizing substance, oxygen in the oxide superconductor layer is not taken away by glass or the like. As a result, a sufficient amount of oxygen can be ensured in the oxide superconductor layer, and deterioration of superconducting properties such as critical temperature and critical current can be prevented. This non-oxidizing substance includes silver (Ag), gold (Au),
Noble metals such as platinum (pt) and palladium (Pd) or alloys based on these metals can be used. In contrast, ordinary metallic materials such as copper, copper alloys (
Cu-Ni, Cu-8n, etc.), stainless steel (SUS
304, 5 US 316, etc.), Nb, Mo, Ta, and other high-melting point metals are mostly oxidizing, and their oxidizing properties become particularly strong at high temperatures, so they cannot be used for such purposes.
この発明の一実施例にかかる超電導線材は、第１図に示
すように、中心のＡｇ線材１の表面上に酸化物超電導層
２が設けられている。ここで酸化物超電導２は、たとえ
ばＹＢａ２Ｃｕ３０ｇ−δ（δ：０〜７）やＬ ａ １
．８５ｓ ｒ ｏ、 １５Ｃｕ Ｏ４などの、２Ａ族（
Ｃａ、Ｓｒ、Ｂａ等）と３Ａ族（Ｓｃ。
Ｙ、ランタン族等）と銅とを組み合わせて構成される酸
化物超電導体からなる。
このような超電導線材は、たとえば次のようにして作製
することができた。まず、Ａｇを直径２５μｍの線材に
形成した。Ａｇはこのような加工が容易で、数μｍ程度
の細い線材とすることもできる。その次にこの線材の表
面に第２図に示すようなスパッタ装置６によりＹＢａ２
Ｃｕ３Ｏ７層を形成した。
このスパッタ装置６は円筒型であるが、これは通常の対
向電極型スパッタ装置では細い線材の表面に均一に超電
導層を形成することが難しいからである。この円筒型ス
パッタ装置６は、垂直（上下方向）に配置された円筒型
のＹＢａ２Ｃｕ３Ｏ７ターゲット（陰極）６２と、その
内側に垂直に配置された３本のアノード６１とからなる
。その中心にＡｇ線材１を垂直に中吊りし、イオンガス
としてアルゴンを用い、直流スパッタを行った。その後
、９００℃の雰囲気中に３時装置いて反応熱処理を行っ
た。
こうして得た超電導線材について臨界温度（ＴＣ）と液
体窒素温度での電流密度（Ｊｃ）とを測定したところ、
Ｔｃ＝９１°に、Ｊｃ＝５００Ａ／ｃｍ２であり、良好
な超電導特性が得られていることが分かった。これに対
し、参考までにＡｇ線材１の代わりに第４図のようなガ
ラスファイバ３を中心支持体とした超電導線材を同じ工
程によって作ってみたが、
Ｔｃ ＝８９°に、Ｊｃ＝６０Ａ／ｃｍ２となり、低い
超電導特性となっている。
第３図は第２の実施例の断面図であるが、この図に示す
ように酸化物超電導層２の上にさらに補強層や安定化材
の層などの被覆層５を設ける場合には、この被覆層５と
酸化物超電導層２との界面にＡｇ層４を形成して酸化物
超電導層２から被覆層５への酸素の拡散を防ぐようにし
ている。
なお、上記の各実施例では酸化物超電導層２から酸素が
奪われるのを防ぐためにＡｇ線材１、Ａｇ層４を使用し
ていが、Ａｕ、 Ｐｔ、 Ｐｄなどの他の貴金属を用い
ることもできる。また、これらの貴金属以外に貴金属同
士の合金てもよく、さらに他の元素（たとえは銅）との
合金でも、この他元素を希薄元素としておいて非酸化性
を保つようにした合金であれは、十分使用することがで
きる。そして、貴金属層４については、それが設けられ
た以降、伸線工程などの加工工程を経ることかないため
、掻く薄い層で十分であり、したがって、スパッタ法の
他に蒸着法や、メッキ法、あるいはＣＶＤ法などでも形
成できる。In a superconducting wire according to an embodiment of the present invention, as shown in FIG. 1, an oxide superconducting layer 2 is provided on the surface of a central Ag wire 1. Here, the oxide superconductor 2 is, for example, YBa2Cu30g-δ (δ: 0 to 7) or L a 1
．． 2A group (such as 85s r o, 15Cu O4)
It is made of an oxide superconductor composed of a combination of 3A group (Sc, Y, lanthanum group, etc.), copper (Ca, Sr, Ba, etc.), and copper. Such a superconducting wire could be produced, for example, as follows. First, Ag was formed into a wire rod with a diameter of 25 μm. Ag can be easily processed in this way, and can be made into a thin wire rod of about several micrometers. Next, the surface of this wire is coated with YBa2 using a sputtering device 6 as shown in FIG.
A Cu3O7 layer was formed. This sputtering device 6 has a cylindrical shape because it is difficult to uniformly form a superconducting layer on the surface of a thin wire with a normal facing electrode type sputtering device. This cylindrical sputtering device 6 consists of a cylindrical YBa2Cu3O7 target (cathode) 62 arranged vertically (in the vertical direction) and three anodes 61 arranged vertically inside the cylindrical YBa2Cu3O7 target (cathode). An Ag wire 1 was suspended vertically in the center, and DC sputtering was performed using argon as the ion gas. Thereafter, reaction heat treatment was performed in an atmosphere at 900° C. for 3 hours. When the critical temperature (TC) and current density (Jc) at liquid nitrogen temperature were measured for the superconducting wire thus obtained, it was found that Tc = 91° and Jc = 500 A/cm2, indicating that good superconducting properties were obtained. I found out that there is. On the other hand, for reference, I tried making a superconducting wire using the same process using the glass fiber 3 as the central support as shown in Figure 4 instead of the Ag wire 1, but with Tc = 89° and Jc = 60A/cm2. Therefore, it has low superconducting properties. FIG. 3 is a cross-sectional view of the second embodiment. When a covering layer 5 such as a reinforcing layer or a stabilizing material layer is further provided on the oxide superconducting layer 2 as shown in this figure, An Ag layer 4 is formed at the interface between the coating layer 5 and the oxide superconducting layer 2 to prevent oxygen from diffusing from the oxide superconducting layer 2 to the coating layer 5. Note that in each of the above embodiments, the Ag wire 1 and the Ag layer 4 are used to prevent oxygen from being taken away from the oxide superconducting layer 2, but other noble metals such as Au, Pt, and Pd may also be used. . In addition to these precious metals, alloys of precious metals may also be used, as well as alloys with other elements (for example, copper), and alloys made with other elements as diluted elements to maintain non-oxidizing properties. , can be fully used. As for the noble metal layer 4, since it does not undergo any processing steps such as wire drawing after it is provided, a thin layer is sufficient. Therefore, in addition to sputtering, vapor deposition, plating, Alternatively, it can be formed by a CVD method or the like.
この発明によれは、酸化物超電導層が非酸化性物質の線
材により支持されているので、酸化物超電導層中の酸素
が奪われることがなく、十分な酸素量を確保てき、臨界
温度や臨界電流などの超電導特性の劣化がない、細くて
十分な可撓性を有する超電導線材が実現てきる。According to this invention, since the oxide superconducting layer is supported by a wire made of a non-oxidizing substance, the oxygen in the oxide superconducting layer is not taken away, and a sufficient amount of oxygen is secured, and the critical temperature and critical A thin and sufficiently flexible superconducting wire without deterioration of superconducting properties such as current flow will be realized.
第１図はこの発明の一実施例にかかる超電導線材の断面
図、第２図は同実施例の超電導線材を製造するためのス
パッタ装置の一例を示す断面図、第３図は他の実施例の
断面図、第４図は従来例の断面図、第５図は従来例の不
都合を説明するだめの断面図である。
１・・Ａｇ線材、２・・酸化物超電導層、２１・・脱酸
素領域、３・ガラスファイバ、４・・Ａｇ層、５・・・
被覆層、６・・スパッタ装置、６１・・アノード、６２
・・ターゲラ１〜。FIG. 1 is a cross-sectional view of a superconducting wire according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing an example of a sputtering apparatus for producing the superconducting wire of the same embodiment, and FIG. 3 is another embodiment. FIG. 4 is a cross-sectional view of the conventional example, and FIG. 5 is a cross-sectional view for explaining the disadvantages of the conventional example. 1.Ag wire, 2.Oxide superconducting layer, 21.Oxygen removal region, 3.Glass fiber, 4.Ag layer, 5.
Covering layer, 6... Sputtering device, 61... Anode, 62
...Tagera 1~.
Claims (4)
囲を被覆する酸化物超電導体の層とからなる超電導線材
。(1) A superconducting wire comprising a wire made of a non-oxidizing substance and a layer of an oxide superconductor surrounding the non-oxidizing substance wire.
ことを特徴とする特許請求の範囲第１項記載の超電導線
材。(2) The superconducting wire according to claim 1, wherein the wire made of the non-oxidizing substance is a wire made of a noble metal.
を特徴とする特許請求の範囲第１項記載の超電導線材。(3) The superconducting wire according to claim 1, wherein the wire made of the non-oxidizing substance is a silver wire.
された非酸化性物質の層と、さらにその上に形成された
被覆層とを有することを特徴とする特許請求の範囲第１
項記載の超電導線材。(4) A claim characterized in that it has a layer of a non-oxidizing substance formed to cover the layer of the oxide superconductor, and a covering layer further formed thereon. 1st
Superconducting wire as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62129503A JP2607084B2 (en) | 1987-05-25 | 1987-05-25 | Superconducting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62129503A JP2607084B2 (en) | 1987-05-25 | 1987-05-25 | Superconducting wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63292520A true JPS63292520A (en) | 1988-11-29 |
| JP2607084B2 JP2607084B2 (en) | 1997-05-07 |
Family
ID=15011092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62129503A Expired - Lifetime JP2607084B2 (en) | 1987-05-25 | 1987-05-25 | Superconducting wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2607084B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02116179A (en) * | 1988-10-26 | 1990-04-27 | Toshiba Corp | Superconductor device |
| US7754838B2 (en) | 2006-08-08 | 2010-07-13 | E.I. Du Pont De Nemours And Company | Poly(meth)acrylamides and poly(meth)acrylates containing fluorinated amide |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63289722A (en) * | 1987-05-20 | 1988-11-28 | Sumitomo Electric Ind Ltd | Manufacture of superconductor |
-
1987
- 1987-05-25 JP JP62129503A patent/JP2607084B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63289722A (en) * | 1987-05-20 | 1988-11-28 | Sumitomo Electric Ind Ltd | Manufacture of superconductor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02116179A (en) * | 1988-10-26 | 1990-04-27 | Toshiba Corp | Superconductor device |
| US7754838B2 (en) | 2006-08-08 | 2010-07-13 | E.I. Du Pont De Nemours And Company | Poly(meth)acrylamides and poly(meth)acrylates containing fluorinated amide |
| US8389657B2 (en) | 2006-08-08 | 2013-03-05 | E. I. Du Pont De Nemours And Company | Poly(meth)acrylamides and poly(meth)acrylates containing flourinated amide |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2607084B2 (en) | 1997-05-07 |
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