JPH04138629A - Manufacture of superconducting insulated wire - Google Patents
Manufacture of superconducting insulated wireInfo
- Publication number
- JPH04138629A JPH04138629A JP2261943A JP26194390A JPH04138629A JP H04138629 A JPH04138629 A JP H04138629A JP 2261943 A JP2261943 A JP 2261943A JP 26194390 A JP26194390 A JP 26194390A JP H04138629 A JPH04138629 A JP H04138629A
- Authority
- JP
- Japan
- Prior art keywords
- oxide superconductor
- conductor
- insulating layer
- layer
- conductor layer
- 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 6
- 239000002887 superconductor Substances 0.000 claims abstract description 37
- 239000004020 conductor Substances 0.000 claims abstract description 25
- 239000000919 ceramic Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims abstract description 8
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 21
- 238000005507 spraying Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 abstract description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003507 refrigerant Substances 0.000 abstract description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052737 gold Inorganic materials 0.000 abstract description 2
- 239000010931 gold Substances 0.000 abstract description 2
- 229910052697 platinum Inorganic materials 0.000 abstract description 2
- 229910052709 silver Inorganic materials 0.000 abstract description 2
- 239000004332 silver Substances 0.000 abstract description 2
- 239000000428 dust Substances 0.000 abstract 2
- 238000010285 flame spraying Methods 0.000 abstract 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 1
- 239000000395 magnesium oxide Substances 0.000 abstract 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000001354 calcination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- 229910004481 Ta2O3 Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000006467 substitution reaction 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
【発明の詳細な説明】
産業上の利用分野
本発明は、セラミックの溶射方式で絶縁層を形成すよう
にした酸化物超電導体からなる超電導絶縁電線の製造方
法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a superconducting insulated wire made of an oxide superconductor in which an insulating layer is formed by a ceramic spraying method.
従来の技術及び課題
酸化物超電導体の外周を被覆する導体層の外側に絶縁層
を設けてなる超電導絶縁電線の提供が課題となっている
。酸化物超電導体では、粉末の状態で予めコイル形態等
に成形したのち焼結処理する必要があることから、付与
する絶縁層はその焼結処理に耐えるものであることが要
求される。そのため、有機系絶縁材の使用は不可能であ
る。BACKGROUND OF THE INVENTION A problem is to provide a superconducting insulated wire in which an insulating layer is provided on the outside of a conductor layer covering the outer periphery of an oxide superconductor. Since an oxide superconductor needs to be formed in a powder state into a coil shape or the like and then sintered, the insulating layer applied thereto is required to be able to withstand the sintering process. Therefore, it is impossible to use organic insulating materials.
従来、耐熱性絶縁層を有する絶縁電線の製造方法として
は、導体の外周にセラミック粉末を塗布し、そのセラミ
ック粉末を焼結処理する方法が知られていた。Conventionally, as a method for manufacturing an insulated wire having a heat-resistant insulating layer, a method has been known in which ceramic powder is applied to the outer periphery of a conductor and the ceramic powder is sintered.
しかしながら、コイル等に二次加工する場合にセラミッ
ク粉末が脱落する問題点、薄い絶縁層の形成が困難で冷
却効率に劣ると共に、高密度なコイルが得られない問題
点、密着力に乏しくて脱落しやすくそのセラミック粉が
冷媒循環系統を目詰まりさせる問題点があった。However, there are problems with ceramic powder falling off when secondary processing into coils, etc., difficulty in forming a thin insulating layer, resulting in poor cooling efficiency, and difficulty in obtaining a high-density coil, and poor adhesion, causing the ceramic powder to fall off. There was a problem that the ceramic powder easily clogged the refrigerant circulation system.
本発明は、前記問題点の克服を課題とする。The present invention aims to overcome the above-mentioned problems.
課題を解決するための手段
本発明は、酸化物超電導体からなる粉末層を被覆する導
体層の表面にセラミックを溶射して絶縁層を形成したの
ち、前記の導体ないし酸化物超電導体の融点未満の温度
で加熱処理して当該酸化物超電導体の粉末を焼結させる
ことを特徴とする超電導絶縁電線の製造方法を提供する
ものである。Means for Solving the Problems In the present invention, after forming an insulating layer by thermally spraying ceramic on the surface of a conductor layer covering a powder layer made of an oxide superconductor, The present invention provides a method for manufacturing a superconducting insulated wire, characterized in that the powder of the oxide superconductor is sintered by heat treatment at a temperature of .
作用
セラミックの溶射方式で絶縁層を形成することにより、
耐熱性に優れ、しかも薄（て密着力に優れると共に、耐
加工性にも優れるものを形成することができる。By forming an insulating layer using the active ceramic spraying method,
It is possible to form a material that has excellent heat resistance, is thin, has excellent adhesion, and has excellent processing resistance.
実施例
本発明においては、酸化物超電導体の粉末層を被覆する
導体層の表面にセラミックを溶射して絶縁層を形成する
。図にその形成方式を例示した。Embodiment In the present invention, an insulating layer is formed by spraying ceramic onto the surface of a conductor layer covering a powder layer of an oxide superconductor. The figure shows an example of the formation method.
１が酸化物超電導体の粉末層を被覆する導体層、２がボ
ビン、３がセラミックのプラズマ式の溶射ノズルである
。1 is a conductor layer covering a powder layer of an oxide superconductor, 2 is a bobbin, and 3 is a ceramic plasma spray nozzle.
回倒は、コイルを得る場合のものであり、表面をサンド
ブラスト等て粗面化加工した導体層１をボビン２に巻回
しつつ、ボビン上に配置した溶射ノズル３を矢印方向に
トラバースさせてセラミックを溶射し、導体層１上に１
０〜３０犀の絶縁層を形成しつつその絶縁層を介して導
体層１を巻重ねるようにして絶縁電線からなるコイルを
形成するものである。Winding is for obtaining a coil, and while winding the conductor layer 1 whose surface has been roughened by sandblasting etc. around the bobbin 2, the thermal spray nozzle 3 placed on the bobbin is traversed in the direction of the arrow. 1 on conductor layer 1.
A coil consisting of an insulated wire is formed by forming an insulating layer of 0 to 30 dia and winding a conductor layer 1 through the insulating layer.
前記において、導体層の内部に酸化物超電導体の粉末を
有するものは例えば、導体チューブに粒径が１００μｍ
以下、就中０．１〜ｌＯμｍの酸化物超電導体の粉末を
充填することにより得ることができる。In the above, for example, when the conductor layer has oxide superconductor powder inside, the conductor tube has a particle size of 100 μm.
The following can be obtained by filling oxide superconductor powder with a thickness of 0.1 to 10 μm.
本発明においては、かかる充填体をダイスやピンチロー
ル等を用いて冷間加工して線やテープ等の線材形態とし
たものや、更にその線材化物をプレス処理したもの、あ
るいはプレス処理と加熱処理を繰返したものなどであっ
てもよい。前記のプレス処理は、得られる酸化物超電導
体の臨界電流密度の向上に有効である。In the present invention, such a filling body is cold-processed using a die or pinch roll to form a wire rod such as a wire or tape, or the wire rod is further press-treated, or press-treated and heat-treated. It may be a repetition of the above. The above pressing treatment is effective in improving the critical current density of the obtained oxide superconductor.
酸化物超電導体の粉末を被覆する導体は、例えば銀、金
、白金やそれらの合金など、焼結温度に耐えるものであ
ればよい。The conductor covering the oxide superconductor powder may be any material that can withstand the sintering temperature, such as silver, gold, platinum, or alloys thereof.
溶射するセラミックとしては、例えばＭ ｇ Ｏ％Ｔｉ
Ｏ２、Ｔａ２Ｏ３，５ｒＴｉＯ：＋など、焼結温度に耐
えて焼結時に導体と反応しないものが用いられる。セラ
ミックの溶射方式は任意であり、形成する絶縁層の厚さ
は５０囲以下、就中１０〜３０μＭが一般的である。厚
過ぎる絶縁層は熱伝導性に劣り、冷却効率を低下させ、
加工性にも劣る。Examples of ceramics to be thermally sprayed include M g O%Ti
Materials such as O2, Ta2O3, and 5rTiO:+ that can withstand the sintering temperature and do not react with the conductor during sintering are used. The ceramic spraying method is arbitrary, and the thickness of the insulating layer to be formed is generally 50 μM or less, particularly 10 to 30 μM. An insulating layer that is too thick has poor thermal conductivity, reducing cooling efficiency,
It is also inferior in processability.
セラミックを溶射して絶縁層が形成された導体層は、導
体ないし酸化物超電導体の融点未満の温度で加熱処理し
て当該酸化物超電導体の粉末を焼結させてバルク化し、
酸化物超電導体の絶縁電線とされる。The conductor layer on which the insulating layer is formed by thermal spraying ceramic is heat-treated at a temperature below the melting point of the conductor or oxide superconductor to sinter the powder of the oxide superconductor and bulk it.
It is considered to be an insulated wire made of oxide superconductor.
本発明において酸化物超電導体の種類については特に限
定はない。その例としてはＹＢａ２ Ｃｕ３０、やＹ
＠ Ｂａ２ Ｃｕ＜ Ｏｃの如きＹ系酸化物超電導体、
Ｂａ１−ｄＫｄＢｉＯ３の如きＢａ系酸化物超電導体、
Ｎｄ２−ｅＣｅｅＣｕｌｔの如きＮｄ系酸化物超電導体
、Ｂｉ２−、Ｐｂｒ ５ｒ２Ｃａ２Ｃｕ３０ｈやＢｉ２
５ｒ２Ｃａｔ−０ＣＬＩＩ ＯＪの如きＢｉ系酸化物超
電導体、その他、Ｌａ系酸化物超電導体、Ｔ１系酸化物
超電導体、Ｐｂ系酸化物超電導体など、また前記のＹ等
の成分を他の希土類元素で置換したもの、ないしＢａ等
の成分を他のアルカリ土類金属で置換したもの、あるい
は０成分をＦなどで置換したもの、さらにはそれらのピ
ンニングセンター含有系のものなどがあげられる。In the present invention, there are no particular limitations on the type of oxide superconductor. Examples include YBa2 Cu30, and Y
Y-based oxide superconductor such as @Ba2Cu<Oc,
Ba-based oxide superconductors such as Ba1-dKdBiO3,
Nd-based oxide superconductors such as Nd2-eCeeCult, Bi2-, Pbr 5r2Ca2Cu30h and Bi2
Bi-based oxide superconductors such as 5r2Cat-0CLII OJ, other La-based oxide superconductors, T1-based oxide superconductors, Pb-based oxide superconductors, etc., and the above components such as Y with other rare earth elements. Examples include those with substitutions, those with components such as Ba replaced with other alkaline earth metals, those with zero components replaced with F etc., and pinning center-containing systems thereof.
前記したピンニングセンター含有系の酸化物超電導体は
、そのピンニングセンターによる磁束のピン止め効果に
より高い磁場下においても大きな臨界電流密度を示す利
点をもつ。かかる酸化物超電導体の形成は、溶融方式例
えば、酸化物超電導体を部分溶融させたのち方向磨面さ
せるＭＴＧ法（Ｍｅｌｔ−Ｔｅｘｔｕｒｅｄ−Ｇｒｏｗ
ｔｈ ）や、酸化物超電導組成の原料粉末を溶融させた
のち急冷し、ついで半溶融温度に加熱して部分溶融させ
たのち徐冷するＱＭＧ法（Ｑｕｅｎｃｈ−ａｎｄ−Ｍｅ
ｌｔ−Ｇｒｏｗｔｈ） 、あるいは酸化物超電導体形成
用の原料粉末を適当な組成で仮焼後、加熱溶融させて急
冷し、形成さ、れた凝固物を粉砕後その粉末を成形体と
して半溶融温度で部分溶融させて徐冷するＭＰＭＧ法（
Ｍｅｌｔ−Ｐｏｗｄｅｒｉｎｇ−Ｍｅｌｔ−Ｇｒｏｗｔ
ｈ ）などにより行うことができる。The pinning center-containing oxide superconductor described above has the advantage of exhibiting a large critical current density even under a high magnetic field due to the pinning effect of the magnetic flux by the pinning center. Such an oxide superconductor can be formed by a melting method, such as the MTG method (Melt-Textured-Grow), in which the oxide superconductor is partially melted and then directionally polished.
th) or the QMG method (Quench-and-Me
lt-Growth), or after calcining the raw material powder for forming an oxide superconductor with an appropriate composition, heating and melting it and rapidly cooling it, pulverizing the formed solidified material, and then making the powder into a molded body at a semi-melting temperature. MPMG method of partially melting and slow cooling (
Melt-Powdering-Melt-Growt
h) etc.
前記のＭＰＭＧ法においては酸化物超電導体の粉末とピ
ンニングセンターとなる非酸化物超電導体の粉末を混合
し、これを仮焼してなるものに加熱溶融以下の措置を施
す方式などによってもピンニングセンター含有の酸化物
超電導体を形成することができる。本発明では、後者の
方式を含むＭＰＭＧ法などにより形成した、ピンニング
センターが超電導相中に微細な状態で均質に分散してい
るものが好ましく用いつる。In the above-mentioned MPMG method, the pinning center can also be created by mixing oxide superconductor powder and non-oxide superconductor powder, which will become the pinning center, and then calcining the mixture and subjecting the resultant to heat melting or other steps. It is possible to form an oxide superconductor containing oxides. In the present invention, a material in which pinning centers are homogeneously dispersed in a fine state in a superconducting phase, which is formed by the MPMG method including the latter method, is preferably used.
発明の効果
本発明によれば、導体層の外側にセラミックの溶射方式
で絶縁層を形成するようにしたので、導体層に対する密
着力と薄さに優れる絶縁層とすることができて、冷却効
率に優れる酸化物超電導体の絶縁電線を得ることができ
る。また加工性に優れ、高密度なコイルを得ることがで
きて、冷媒循環系統の目詰まりも生じにくい。Effects of the Invention According to the present invention, since the insulating layer is formed on the outside of the conductor layer by a ceramic spraying method, the insulating layer has excellent adhesion to the conductor layer and is thin, resulting in improved cooling efficiency. An insulated wire made of an oxide superconductor with excellent properties can be obtained. In addition, it has excellent workability, allows the production of high-density coils, and is less likely to clog the refrigerant circulation system.
図はセラミックの溶射方式を例示した説明図である。
１、酸化物超電導体の粉末層を被覆する導体層２：ボビ
ン ３：溶射ノズルThe figure is an explanatory diagram illustrating a ceramic thermal spraying method. 1. Conductor layer covering the oxide superconductor powder layer 2: Bobbin 3: Thermal spray nozzle
Claims (1)
表面にセラミックを溶射して絶縁層を形成したのち、前
記の導体ないし酸化物超電導体の融点未満の温度で加熱
処理して当該酸化物超電導体の粉末を焼結させることを
特徴とする超電導絶縁電線の製造方法。1. After forming an insulating layer by spraying ceramic on the surface of a conductor layer covering a powder layer made of an oxide superconductor, the oxide superconductor is heated at a temperature below the melting point of the conductor or oxide superconductor. A method for manufacturing a superconducting insulated wire, which comprises sintering body powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2261943A JPH04138629A (en) | 1990-09-28 | 1990-09-28 | Manufacture of superconducting insulated wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2261943A JPH04138629A (en) | 1990-09-28 | 1990-09-28 | Manufacture of superconducting insulated wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04138629A true JPH04138629A (en) | 1992-05-13 |
Family
ID=17368831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2261943A Pending JPH04138629A (en) | 1990-09-28 | 1990-09-28 | Manufacture of superconducting insulated wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04138629A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6584334B2 (en) * | 1994-04-29 | 2003-06-24 | American Superconductor Corp. | Process for heat treating superconductor wire |
-
1990
- 1990-09-28 JP JP2261943A patent/JPH04138629A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6584334B2 (en) * | 1994-04-29 | 2003-06-24 | American Superconductor Corp. | Process for heat treating superconductor wire |
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