JPH01176609A - Manufacture of oxide superconductive wire material - Google Patents
Manufacture of oxide superconductive wire materialInfo
- Publication number
- JPH01176609A JPH01176609A JP63000484A JP48488A JPH01176609A JP H01176609 A JPH01176609 A JP H01176609A JP 63000484 A JP63000484 A JP 63000484A JP 48488 A JP48488 A JP 48488A JP H01176609 A JPH01176609 A JP H01176609A
- Authority
- JP
- Japan
- Prior art keywords
- wire material
- oxide
- primary
- wire
- current density
- 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 abstract description 9
- 239000000463 material Substances 0.000 title abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000002887 superconductor Substances 0.000 claims abstract description 8
- 230000007704 transition Effects 0.000 claims 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052697 platinum Inorganic materials 0.000 abstract description 6
- 239000004570 mortar (masonry) Substances 0.000 abstract description 5
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract 2
- 238000000227 grinding Methods 0.000 abstract 1
- 238000005491 wire drawing Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000007787 solid Substances 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
【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、酸化物超電導線材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 superconducting wire.
（従来の技術）
液体窒素温度程度あるいはその以上の温度で超電導を示
す酸化物セラミックス超電導体が注目されている。代表
的には、ＹＢａ２Ｃｕｘ０７□や（Ｌ ａｔ−ｍ Ｓ
ｒ、 ） ２ Ｃｕ ０４−ｙが知られティる。いず
れもペロブスカイト構造を有する酸化物である。この様
な酸化物超電導体を、例えば高磁界を発生するための超
電等コイルに応用する場合には、臨界電流密度の大きい
線材を如何にして作るかということが目標となる。(Prior Art) Oxide ceramic superconductors that exhibit superconductivity at temperatures around or above liquid nitrogen temperature are attracting attention. Typical examples include YBa2Cux07□ and (L at-m S
r, ) 2 Cu 04-y is known. Both are oxides with a perovskite structure. When applying such an oxide superconductor to, for example, a superelectric coil for generating a high magnetic field, the goal is to find a way to make a wire with a high critical current density.
従来、酸化物超電導線材は代表的には次のようにして作
られている。まず、原料として例えば、ＹｚＯ３，Ｂａ
ＯまたはＢａＣＯ３、及びＣｕＯを用意し、これらを１
：２：３のモル比に混合し、ルツボ中で９００℃前後に
数時間保持して一次焼成物を作る。次にこの焼成物を粉
砕した後、銅等の金属筒に充填し、この金属筒を圧延ま
たは加熱圧延して線材化する。その後、９００℃前後で
熱処理して、Ｙ Ｂ ａ２Ｃｕ３０７−ｙ線材を得る。Conventionally, oxide superconducting wires are typically produced as follows. First, as raw materials, for example, YzO3, Ba
O or BaCO3, and CuO are prepared, and these are 1
: Mixed at a molar ratio of 2:3 and held at around 900°C for several hours in a crucible to produce a primary fired product. Next, after pulverizing this fired product, it is filled into a metal cylinder made of copper or the like, and this metal cylinder is rolled or heated to form a wire rod. Thereafter, it is heat treated at around 900°C to obtain a YBa2Cu307-y wire.
しかしこの様な方法では、得られる臨界電流密度Ｊｃは
１０４Ａ／ｃＩｎ２以下であり、未だ実用上十分な臨界
電流密度の線材は得られていない。その理由は、従来法
による線材が多孔質になるためである。However, with this method, the critical current density Jc obtained is less than 104 A/cIn2, and a wire with a critical current density sufficient for practical use has not yet been obtained. The reason for this is that the wire produced by the conventional method becomes porous.
（発明が解決しようとする課題）
以上のように従来の方法では、実用上十分な臨界電流密
度の酸化物超電導線材は得られない、という問題があっ
た。(Problems to be Solved by the Invention) As described above, the conventional method has the problem that an oxide superconducting wire having a practically sufficient critical current density cannot be obtained.
本発明は、この様な問題を解決した、臨界電流密度の大
きい酸化物超電導線材の製造方法を提供することを目的
とする。An object of the present invention is to provide a method for manufacturing an oxide superconducting wire having a high critical current density, which solves these problems.
［発明の構成］
（課題を解決するための手段）
本発明は、酸化物超電導体の一次焼成物を製造し、これ
を加熱して半溶融状態として線引きし、その後超電導相
に遷移させるための熱処理を行なうことを特徴とする。[Structure of the Invention] (Means for Solving the Problems) The present invention provides a method for producing a primary fired product of an oxide superconductor, heating it to draw it into a semi-molten state, and then transitioning it to a superconducting phase. It is characterized by heat treatment.
半溶融状態を得る温度は例えば、１０００〜１３００℃
である。また、線材を超電導相に遷移させるための熱処
理は例えば、６００〜９５０℃で１〜５００時間とする
。The temperature to obtain a semi-molten state is, for example, 1000 to 1300°C.
It is. Further, the heat treatment for transitioning the wire to the superconducting phase is performed at, for example, 600 to 950° C. for 1 to 500 hours.
（作用）
本発明は、Ｙ Ｂ ａ２Ｃｕ３０□−９等の酸化物超電
導体が熱的に複雑な特性を有することを利用したものと
言える。即ち、Ｙ Ｂ ａ２Ｃｕ３０□−７−次焼成物
は１０００℃以上で半溶融状態とすることができ、この
状態で細い孔から押出せば容易に線材化することができ
る。金属筒に充填してこれを圧延する場合に比べて、材
料を細い孔から引出すことにより、ち密な線材が得られ
る。但しこのままでは超電導相は得られないから、その
後、９００℃前後で熱処理する。これにより、臨界電流
密度の大きい酸化物超電導線材が得られる。(Function) The present invention can be said to utilize the fact that oxide superconductors such as YBa2Cu30□-9 have complex thermal characteristics. That is, the YBa2Cu30□-7-stage fired product can be made into a semi-molten state at 1000°C or higher, and can be easily made into a wire by extruding it through a narrow hole in this state. Compared to the case where the material is filled into a metal tube and then rolled, a denser wire can be obtained by drawing the material through narrow holes. However, since a superconducting phase cannot be obtained in this state, a heat treatment is then performed at around 900°C. As a result, an oxide superconducting wire having a high critical current density can be obtained.
（実施例） 以下、本発明の実施例を図面を参照して説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
第１図は、一実施例のＹ Ｂ ａｚ Ｃｕｉ ０７−ｙ
線材の製造工程を示す。まず、原料として、Ｙ２”０３
、Ｂａ Ｃ０３及びＣｕＯをモル比１／２：２：３と
なるように計１００ｇ秤量し、これを乳鉢で微粉末にす
る。この原料２を白金ルツボ１に入れて９００℃、５時
間程度加熱して一次焼成する。得られた一次焼成物４を
乳鉢３で再度微粉末とする。そしてこの微粉末とした一
次焼成物４を底に直径１ ｍｒｌの孔が開いた白金ルツ
ボ５に収容し、１１００℃に加熱して半溶融状態を形成
する。このとき加熱炉は酸素雰囲気とする。この半溶融
状態で一次焼成物４を押出し、孔から引き伸ばして線材
６を得る。こうして得られた線材６はこのままでは超電
導特性を示さないから、次に、酸素雰囲気中で９２０℃
、１００時間の熱処理を行ない、超電導特性を示すＹ
Ｂ ａ：２ Ｃυ３０．−、線材を得る。９２０°Ｃで
は線材５は固体のままであり、変形は生じない。FIG. 1 shows an example of YB az Cui 07-y.
The manufacturing process of the wire rod is shown. First, as a raw material, Y2”03
, Ba C03 and CuO in a molar ratio of 1/2:2:3, a total of 100 g was weighed out, and ground into fine powder in a mortar. This raw material 2 is placed in a platinum crucible 1 and heated at 900° C. for about 5 hours to undergo primary firing. The obtained primary fired product 4 is again pulverized in a mortar 3. The finely powdered primary fired product 4 is placed in a platinum crucible 5 having a hole with a diameter of 1 mrl in the bottom, and heated to 1100° C. to form a semi-molten state. At this time, the heating furnace is in an oxygen atmosphere. The primary fired product 4 is extruded in this semi-molten state and stretched through the holes to obtain the wire rod 6. Since the wire 6 thus obtained does not exhibit superconducting properties as it is, it is then heated at 920°C in an oxygen atmosphere.
, after 100 hours of heat treatment, Y exhibits superconducting properties.
B a:2 Cυ30. - Obtain a wire. At 920°C, the wire 5 remains solid and no deformation occurs.
この実施例によるＹ Ｂａ２Ｃ１３０７□線材は、９５
Ｋで超電導特性を示し、７７にでの臨界電流密度は１
０５Ａ／ｃｍ２以上であった。The Y Ba2C1307□ wire according to this example is 95
It exhibits superconducting properties at K, and the critical current density at 77 is 1.
It was more than 0.05A/cm2.
本発明は、Ｙ Ｂ ａ２Ｃ１１３０７−ｙに限らず、−
般にＡ Ｂ ａ２ＣＬｌ＋ ０７−ｙ （Ａは、Ｙ、
Ｙｂ。The present invention is not limited to YBa2C11307-y, but -
Generally A B a2CLl+ 07-y (A is Y,
Yb.
Ｄｙ、Ｈｏ、Ｅｒ、Ｅｕ、Ｔｍ、Ｌｕなどの希土類元素
）で表わされるペロブスカイト型酸化物超電導体に適用
できる。また、（Ｌａ Ｉ−ｘ Ｓｒ ｘ ） ２ Ｃ
ｕ ０４−ｖ （ＳｒをＢａ。It can be applied to perovskite-type oxide superconductors represented by rare earth elements such as Dy, Ho, Er, Eu, Tm, and Lu. Also, (La I-x Sr x ) 2 C
u 04-v (Sr to Ba.
Ｃａなどに置換したものを含む）等地のペロブスカイト
型酸化物超電導体にも適用できる。It can also be applied to isochthonous perovskite-type oxide superconductors (including those substituted with Ca, etc.).
［発明の効果コ
以上述べたように本発明によれば、−次焼成物の半溶融
状態からの線引きによってち密な線祠を得ることができ
、従来にない臨界電流密度の大きい酸化物超電導線材を
得ることができる。[Effects of the Invention] As described above, according to the present invention, a dense wire can be obtained by drawing from a semi-molten state of the fired product, and an oxide superconducting wire with an unprecedentedly high critical current density can be obtained. can be obtained.
第１図は、本発明の一実施例による
Ｙ Ｂ ａｚ ＣＩＪ３０７−Ｆ線材の製造工程を示す
図である。
１・・・白金ルツボ、２・・・Ｙ Ｂ ａ２Ｃ０３０７
−、原料、３・・・乳鉢、４− Ｙ Ｂ ａｚ Ｃｕ３
０７−Ｙ−次焼成物、５・・・白金ルツボ、
６− Ｙ Ｂ ａ２Ｃｕ３０７−ｙ線材。
出願人代理人 弁理士 鈴江武彦
Ｙ２Ｏ３ＢａＣ０ａ ＣｕＯ
第１ 図
（ｇ−州し］（熱処刺FIG. 1 is a diagram showing a manufacturing process of Y B az CIJ307-F wire rod according to an embodiment of the present invention. 1...Platinum crucible, 2...Y B a2C0307
-, raw material, 3... mortar, 4- Y B az Cu3
07-Y-second fired product, 5... platinum crucible, 6- YBa2Cu307-y wire rod. Applicant's agent Patent attorney Takehiko Suzue Y2O3BaC0a CuO Figure 1 (g-state) (heat treatment
Claims (1)
半溶融状態として線引きした後、超電導相へ遷移させる
熱処理を行なうことを特徴とする酸化物超電導線材の製
造方法A method for producing an oxide superconducting wire, which comprises producing a primary fired product of an oxide superconductor, heating it to a semi-molten state, drawing it, and then performing heat treatment to transition it to a superconducting phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63000484A JPH01176609A (en) | 1988-01-05 | 1988-01-05 | Manufacture of oxide superconductive wire material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63000484A JPH01176609A (en) | 1988-01-05 | 1988-01-05 | Manufacture of oxide superconductive wire material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01176609A true JPH01176609A (en) | 1989-07-13 |
Family
ID=11475044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63000484A Pending JPH01176609A (en) | 1988-01-05 | 1988-01-05 | Manufacture of oxide superconductive wire material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01176609A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6472905A (en) * | 1987-06-12 | 1989-03-17 | American Telephone & Telegraph | Production of superconductor and device and system comprising same |
-
1988
- 1988-01-05 JP JP63000484A patent/JPH01176609A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6472905A (en) * | 1987-06-12 | 1989-03-17 | American Telephone & Telegraph | Production of superconductor and device and system comprising same |
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