JPH0713924B2 - Superconducting magnet - Google Patents
Superconducting magnetInfo
- Publication number
- JPH0713924B2 JPH0713924B2 JP10290087A JP10290087A JPH0713924B2 JP H0713924 B2 JPH0713924 B2 JP H0713924B2 JP 10290087 A JP10290087 A JP 10290087A JP 10290087 A JP10290087 A JP 10290087A JP H0713924 B2 JPH0713924 B2 JP H0713924B2
- Authority
- JP
- Japan
- Prior art keywords
- tape
- single crystal
- shaped wire
- axis direction
- magnetic field
- 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.)
- Expired - Fee Related
Links
- 239000013078 crystal Substances 0.000 claims description 30
- 239000002887 superconductor Substances 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 5
- 230000002950 deficient Effects 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000000758 substrate Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910003808 Sr-Cu Inorganic materials 0.000 description 1
- 229910002367 SrTiO Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、超電導体として単結晶酸化物を用いた超電
導マグネットの構造に関するものである。The present invention relates to the structure of a superconducting magnet using a single crystal oxide as a superconductor.
［従来の技術］ 最近、より高い超電導臨界温度を示す超電導材料として
酸化物超電導体が注目されている。これまでに知られて
いる酸化物超電導体としては、K2NiF4型に類似の層状ペ
ロブスカイト構造や酸素損ペロブスカイト構造がある。
たとえば、La−Sr−Cu系酸化物、La−Ba−Cu系酸化物、
Ba−Ｙ−Cu系酸化物およびSr−Ｙ−Cu系酸化物などが知
られている。第６図に、Ba2YCu3O7-xの組成を有する酸
素欠損ペロブスカイト型の酸化物超電導体の結晶構造の
模式図を示す。[Prior Art] Recently, oxide superconductors have attracted attention as a superconducting material exhibiting a higher superconducting critical temperature. Known oxide superconductors include a layered perovskite structure similar to the K 2 NiF 4 type and an oxygen-loss perovskite structure.
For example, La-Sr-Cu-based oxide, La-Ba-Cu-based oxide,
Ba-Y-Cu-based oxides and Sr-Y-Cu-based oxides are known. FIG. 6 shows a schematic diagram of a crystal structure of an oxygen-deficient perovskite-type oxide superconductor having a composition of Ba 2 YCu 3 O 7-x .
［発明が解決しようとする問題点］ ところで、このような層状ペロブスカイト構造および酸
素欠損ペロブスカイト構造においては、ｃ軸方向とa,b
軸方向とで電磁気特性が大きく異なることが知られてい
る。たとえば、（La1-xSrx)2cuO4の組成を有する単結晶
においては、ｃ軸方向の電気抵抗がａ軸方向の電気抵抗
の約20倍であり、またａ軸方向の上部臨界磁場［H
c2(o)］がｃ軸方向のそれより約１桁大きいことが報告
されている（電気通信学会関西支部主催シンポジウム
「高温超伝導材料の作製と応用」（1987年４月６
日））。[Problems to be Solved by the Invention] By the way, in such a layered perovskite structure and an oxygen-deficient perovskite structure, the c-axis direction and a, b
It is known that the electromagnetic characteristics greatly differ from the axial direction. For example, in a single crystal having a composition of (La 1-x Sr x ) 2 cuO 4 , the electric resistance in the c-axis direction is about 20 times the electric resistance in the a-axis direction, and the upper critical magnetic field in the a-axis direction is [H
It has been reported that c2 (o)] is about an order of magnitude larger than that in the c-axis direction (Symposium “Manufacturing and application of high-temperature superconducting materials” sponsored by the Kansai Branch of the Institute of Electrical Communication, April 6, 1987).
Day)).
したがって、これらの酸化物超電導体の単結晶を超電導
体として備えた線材を巻線して超電導マグネットを作製
する場合、発生させた磁場の方向が単結晶のｃ軸方向に
向くと、低い磁場しか発生できないという問題を生じ
る。Therefore, when a superconducting magnet is manufactured by winding a wire rod having a single crystal of these oxide superconductors as a superconductor, if the direction of the generated magnetic field is in the c-axis direction of the single crystal, only a low magnetic field is produced. It causes a problem that it cannot occur.
それゆえに、この発明の目的は、かかる問題を解消し、
使用する超電導体の特性を十分に発揮させることのでき
る超電導マグネットの構造を提供することにある。Therefore, the object of the present invention is to eliminate such problems,
It is an object of the present invention to provide a structure of a superconducting magnet that can fully exhibit the characteristics of the superconductor used.
［問題点を解決するための手段］ この発明の超電導マグネットでは、層状ペロブスカイト
構造または酸素欠損ペロブスカイト構造を有する単結晶
酸化物超電導体を用い、この単結晶酸化物超電導体のｃ
軸方向がテープ状線材のフラット面に垂直となるように
テープ状線材を構成し、このテープ状線材をフラットワ
イズに巻線している。[Means for Solving the Problems] In the superconducting magnet of the present invention, a single crystal oxide superconductor having a layered perovskite structure or an oxygen-deficient perovskite structure is used.
The tape-shaped wire is configured so that its axial direction is perpendicular to the flat surface of the tape-shaped wire, and the tape-shaped wire is wound in a flatwise manner.
［作用］ この発明の超電導マグネットでは、テープ状線材がフラ
ットワイズに巻線されているため、発生する磁場の方向
は、テープ状線材のフラット面に平行になる。したがっ
て、単結晶酸化物超電導体のｃ軸方向と垂直な方向に磁
場が発生し、超電導体のａ軸,b軸の面内方向の大きな臨
界磁場を有効に利用し、大きな磁場の発生させることが
できる。また、テープ状線材内での通電方向は、超電導
体のａ軸,b軸の面内であるので、臨界電流密度を大きく
することができる。このため、超電導マグネット自体を
コンパクト化することができる。[Operation] In the superconducting magnet of the present invention, since the tape-shaped wire is wound in a flatwise manner, the direction of the magnetic field generated is parallel to the flat surface of the tape-shaped wire. Therefore, a magnetic field is generated in a direction perpendicular to the c-axis direction of the single crystal oxide superconductor, and a large critical magnetic field in the in-plane direction of the a-axis and b-axis of the superconductor is effectively used to generate a large magnetic field. You can Further, since the current-carrying direction in the tape-shaped wire is in the plane of the a-axis and the b-axis of the superconductor, the critical current density can be increased. Therefore, the superconducting magnet itself can be made compact.
［実施例］ 第１図は、この発明の一実施例を示す斜視図である。第
２図は、第１図の実施例に用いられるテープ状線材１を
示す拡大断面図である。第２図に示されるように、テー
プ状線材１は、基板２の上に単結晶超電導層３を設ける
ことにより構成されている。単結晶超電導層３にBa−Ｙ
−Cu系酸化物を用いる場合は、基板２としては、たとえ
ばSrTiO3やAl2O3などを用いることができる。基板２の
材質は、その上に成長させる単結晶酸化物の格子定数な
どを考慮して適宜選択される。[Embodiment] FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is an enlarged sectional view showing the tape-shaped wire rod 1 used in the embodiment of FIG. As shown in FIG. 2, the tape-shaped wire 1 is configured by providing a single crystal superconducting layer 3 on a substrate 2. Ba-Y on the single crystal superconducting layer 3
When a —Cu-based oxide is used, the substrate 2 can be, for example, SrTiO 3 or Al 2 O 3 . The material of the substrate 2 is appropriately selected in consideration of the lattice constant of the single crystal oxide grown on it and the like.
この発明において、テープ状線材のフラット面とは広い
幅を有する方の面をいい、エッジ面とは狭い幅を有する
方の面をいう。したがって、第２図に示すテープ状線材
においては、1aがフラット面であり、1bがエッジ面とな
る。矢印Ｂは、単結晶超電導層３のｃ軸方向を示してお
り、このｃ軸方向はフラット面1aに対して垂直になって
いる。In the present invention, the flat surface of the tape-shaped wire means a surface having a wide width, and the edge surface means a surface having a narrow width. Therefore, in the tape-shaped wire rod shown in FIG. 2, 1a is a flat surface and 1b is an edge surface. The arrow B indicates the c-axis direction of the single crystal superconducting layer 3, and the c-axis direction is perpendicular to the flat surface 1a.
第２図に示されるようなテープ状線材１をフラットワイ
ズに巻線し、第１図に示すような超電導マグネットが構
成される。第１図において、矢印Ａはテープ状線材１に
通電することによって発生する磁場の方向を示してお
り、磁場の方向は単結晶超電導層３のｃ軸方向に対して
垂直になっている。したがって、単結晶超電導層３に
は、ａ軸,b軸の面内方向に磁場が働き、ａ軸,b軸の大き
な臨界磁場を有効に利用することができる。A tape-shaped wire rod 1 as shown in FIG. 2 is wound in a flatwise manner to form a superconducting magnet as shown in FIG. In FIG. 1, arrow A indicates the direction of the magnetic field generated by energizing the tape-shaped wire rod 1, and the direction of the magnetic field is perpendicular to the c-axis direction of the single crystal superconducting layer 3. Therefore, a magnetic field acts on the single crystal superconducting layer 3 in the in-plane directions of the a-axis and the b-axis, and a large critical magnetic field of the a-axis and the b-axis can be effectively used.
第３図は、単結晶超電導層のｃ軸方向がフラット面に平
行であるテープ状線材の一例を示す斜視図である。第３
図において、11はテープ状線材、12は基板、13は単結晶
超電導層を示し、矢印Ｃは単結晶超電導層13のｃ軸方向
を示している。第３図に示すようなテープ状線材をフラ
ットワイズに巻いて超電導マグネットを作製すると、発
生する磁場の方向は単結晶超電導層のｃ軸方向と垂直に
なるが、通電の方向がｃ軸と平行になり、大きな臨界電
流密度を得ることができない。FIG. 3 is a perspective view showing an example of a tape-shaped wire in which the c-axis direction of the single crystal superconducting layer is parallel to the flat surface. Third
In the figure, 11 indicates a tape-shaped wire, 12 indicates a substrate, 13 indicates a single crystal superconducting layer, and arrow C indicates the c-axis direction of the single crystal superconducting layer 13. When a tape-shaped wire as shown in Fig. 3 is wound flat-wise to produce a superconducting magnet, the direction of the magnetic field generated is perpendicular to the c-axis direction of the single crystal superconducting layer, but the direction of current flow is parallel to the c-axis. Therefore, a large critical current density cannot be obtained.
第４図は、単結晶超電導層のｃ軸方向がフラット面に平
行であるテープ状線材の他の例を示す斜視図である。第
４図において、21はテープ状線材、22は基板、23は単結
晶超電導層を示し、矢印Ｄは単結晶超電導層23のｃ軸方
向を示している。第４図に示すようなテープ状線材をフ
ラットワイズに巻線すると、単結晶超電導層のｃ軸方向
が発生する磁場の方向と平行になってしまう。したがっ
て、ｃ軸方向を発生する磁場の方向と垂直にするために
は、第５図に示すように、テープ状線材21をエッジワイ
ズに巻線する必要がある。しかしながら、エッジワイズ
に巻線すると、テープ状線材の内側と外側の曲率が大き
く相違し、単結晶超電導層に大きな歪が発生し、超電導
特性が劣化するおそれを生じる。FIG. 4 is a perspective view showing another example of a tape-shaped wire rod in which the c-axis direction of the single crystal superconducting layer is parallel to the flat surface. In FIG. 4, 21 is a tape-shaped wire, 22 is a substrate, 23 is a single crystal superconducting layer, and arrow D is the c-axis direction of the single crystal superconducting layer 23. When a tape-shaped wire as shown in FIG. 4 is wound flatwise, the c-axis direction of the single crystal superconducting layer becomes parallel to the direction of the generated magnetic field. Therefore, in order to make the c-axis direction perpendicular to the direction of the magnetic field generated, it is necessary to wind the tape-shaped wire rod 21 in an edgewise manner as shown in FIG. However, when the winding is performed edgewise, the curvatures of the inside and the outside of the tape-shaped wire material are significantly different, and a large strain is generated in the single crystal superconducting layer, which may deteriorate the superconducting characteristics.
［発明の効果］ 以上説明したように、この発明の超電導マグネットで
は、単結晶酸化物超電導体のｃ軸方向をテープ状線材の
フラット面に垂直にし、テープ状線材をフラットワイズ
に巻線しているため、発生する磁場の方向を単結晶のｃ
軸方向に垂直にすることができ、これによって単結晶の
ａ軸およびｂ軸の面内の方向の大きな臨界電流密度を確
保し、大きな磁場を発生させることができる。[Effects of the Invention] As described above, in the superconducting magnet of the present invention, the c-axis direction of the single crystal oxide superconductor is perpendicular to the flat surface of the tape-shaped wire, and the tape-shaped wire is wound flat-wise. Therefore, the direction of the magnetic field generated is c
It can be perpendicular to the axial direction, whereby a large critical current density in the in-plane directions of the a-axis and the b-axis of the single crystal can be secured and a large magnetic field can be generated.
さらに、この発明ではテープ状線材をフラットワイズに
巻線しているため、エッジワイズに巻線したときのよう
な巻線の歪を生じず、超電導特性が劣化することはな
い。Further, in the present invention, since the tape-shaped wire is wound in a flatwise manner, the distortion of the winding, which occurs when the tape is wound in an edgewise manner, does not occur, and the superconducting characteristics are not deteriorated.
第１図は、この発明の一実施例を示す斜視図である。第
２図は、第１図の実施例に用いられるテープ状線材を示
す拡大断面図である。第３図は、実施例との比較のため
示す図であって、単結晶超電導層のｃ軸方向がフラット
面に平行であるテープ状線材の一例を示す斜視図であ
る。第４図は、同じく実施例との比較のため示す図であ
って、単結晶超電導層のｃ軸方向がフラット面に平行で
あるテープ状線材の他の例を示す斜視図である。第５図
は、エッジワイズの巻線方法を説明するための斜視図で
ある。第６図は、酸化物超電導体の１つであるBa2YCu3O
7-xの結晶構造を示す模式図である。 図において、１はテープ状線材、1aはフラット面、1bは
エッジ面、２は基板、３は単結晶超電導層を示す。FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view showing a tape-shaped wire used in the embodiment of FIG. FIG. 3 is a view for comparison with the example, and is a perspective view showing an example of a tape-shaped wire rod in which the c-axis direction of the single crystal superconducting layer is parallel to the flat surface. FIG. 4 is also a view for comparison with the example, and is a perspective view showing another example of the tape-shaped wire rod in which the c-axis direction of the single crystal superconducting layer is parallel to the flat surface. FIG. 5 is a perspective view for explaining an edgewise winding method. Figure 6 shows Ba 2 YCu 3 O, one of the oxide superconductors.
It is a schematic diagram which shows the crystal structure of 7-x . In the figure, 1 is a tape-shaped wire, 1a is a flat surface, 1b is an edge surface, 2 is a substrate, and 3 is a single crystal superconducting layer.
Claims (1)
ロブスカイト構造を有する単結晶酸化物超電導体を用い
たテープ状線材を巻線してなる超電導マグネットにおい
て、 前記単結晶酸化物超電導体のｃ軸方向が、前記テープ状
線材のフラット面に垂直であり、かつ、前記テープ状線
材がフラットワイズに巻線されていることを特徴とす
る、超電導マグネット。1. A superconducting magnet formed by winding a tape-shaped wire rod using a single crystal oxide superconductor having a layered perovskite structure or an oxygen-deficient perovskite structure, wherein the c-axis direction of the single crystal oxide superconductor is: A superconducting magnet, which is perpendicular to a flat surface of the tape-shaped wire and is wound in a flatwise manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10290087A JPH0713924B2 (en) | 1987-04-24 | 1987-04-24 | Superconducting magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10290087A JPH0713924B2 (en) | 1987-04-24 | 1987-04-24 | Superconducting magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63268206A JPS63268206A (en) | 1988-11-04 |
| JPH0713924B2 true JPH0713924B2 (en) | 1995-02-15 |
Family
ID=14339735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10290087A Expired - Fee Related JPH0713924B2 (en) | 1987-04-24 | 1987-04-24 | Superconducting magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0713924B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01157504A (en) * | 1987-06-03 | 1989-06-20 | Mitsubishi Electric Corp | Superconducting coil |
| JPH01246801A (en) * | 1988-03-19 | 1989-10-02 | Internatl Business Mach Corp <Ibm> | Superconducting magnet |
| JP3794591B2 (en) * | 1994-03-04 | 2006-07-05 | 新日本製鐵株式会社 | Manufacturing method of superconducting magnet |
| JP2000277322A (en) * | 1999-03-26 | 2000-10-06 | Toshiba Corp | High-temperature superconducting coil, high-temperature superconducting magnet using the same, and high-temperature superconducting magnet system |
| JP6315581B2 (en) * | 2014-08-22 | 2018-04-25 | 国立大学法人 熊本大学 | Cathode for solid oxide fuel cell, method for producing the same, and solid oxide fuel cell including the cathode |
-
1987
- 1987-04-24 JP JP10290087A patent/JPH0713924B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63268206A (en) | 1988-11-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |