JPS63291653A - Manufacture of superconducting material of oxide - Google Patents
Manufacture of superconducting material of oxideInfo
- Publication number
- JPS63291653A JPS63291653A JP62126692A JP12669287A JPS63291653A JP S63291653 A JPS63291653 A JP S63291653A JP 62126692 A JP62126692 A JP 62126692A JP 12669287 A JP12669287 A JP 12669287A JP S63291653 A JPS63291653 A JP S63291653A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- powder
- oxide
- container
- magnet
- 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 claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000843 powder Substances 0.000 claims abstract description 58
- 230000005291 magnetic effect Effects 0.000 claims abstract description 13
- 239000002887 superconductor Substances 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000126 substance Substances 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 7
- 230000005389 magnetism Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000005292 diamagnetic effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 150000001341 alkaline earth metal compounds Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/021—Separation using Meissner effect, i.e. deflection of superconductive particles in a magnetic field
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、超電導線や超電導素子の製造に用いられる酸
化物系超電導材料の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for producing an oxide-based superconducting material used for producing superconducting wires and superconducting elements.
「従来技術」
近来、常電導状態から超電導状態に遷移する臨界温度（
Ｔｃ）が液体窒素温度以上の高い値を示す酸化物系の超
電導材料が種々発見されつつある。"Prior art" Recently, the critical temperature at which the normal conductive state transitions to the superconducting state (
Various oxide-based superconducting materials are being discovered that exhibit Tc) values higher than the liquid nitrogen temperature.
この種の超電導材料は、液体ヘリウムによる冷却が必要
であった従来の合金系超電導体や化合物系超電導体に比
較して、遥かに有利な冷却条件で使用できるために、実
用上極めて有望な超電導材料とされている。This type of superconducting material can be used under much more favorable cooling conditions than conventional alloy-based superconductors and compound-based superconductors, which require cooling with liquid helium, making it an extremely promising superconductor in practical use. It is considered as a material.
従来、この種の酸化物系超電導材料の中でＬａ−９ｒ−
Ｃｕ−０系の超電導材料を製造するには、Ｌａ酸化物と
Ｓｒ炭酸塩と酸化銅粉末を混合して所定の形状に加圧成
形し、加熱処理を施して焼結し、更にはこれを粉末化す
ることにより超電導材料を得ている。また、Ｙ −Ｂ
ａ−Ｃｕ−０系の超電導材料を製造するには、Ｙ酸化物
とＢａ炭酸塩と酸化銅粉末を混合し、所定の形状に加圧
成形した後に加熱処理を施して焼結し、更にはこれを粉
末化して超電導材料を得ている。Conventionally, among this type of oxide-based superconducting materials, La-9r-
To produce Cu-0-based superconducting materials, La oxide, Sr carbonate, and copper oxide powder are mixed, pressure-molded into a predetermined shape, heat-treated and sintered, and then Superconducting materials are obtained by powdering them. Also, Y-B
To produce a-Cu-0-based superconducting material, Y oxide, Ba carbonate, and copper oxide powder are mixed, pressure-molded into a predetermined shape, and then heat-treated and sintered. This is powdered to obtain superconducting materials.
「発明が解決しようとする問題点」
ところが、前述のように熱処理を施して得られた超電導
体を微粉状に粉砕して粉末状の超電導材料を製造した場
合、微粉体粒子の総てが超電導体となっていないことが
判明した。これは以下に説明する理由によるものと推定
している。"Problems to be Solved by the Invention" However, when a powdered superconducting material is produced by pulverizing a superconductor obtained by heat treatment into fine powder as described above, all of the fine powder particles become superconducting. It turned out that it was not a body. This is presumed to be due to the reasons explained below.
まず、前述のように酸化物や炭酸塩に熱処理を施して超
電導材料を製造する場合には、混合された酸化物粉末と
炭酸塩が熱分解され、次に炭素等の不要成分がガス化さ
れて除去され、次いで超電導体の構成元素どうしが反応
して超電導体が生成される。ところが、原料粉末の熱分
解と不要成分のガス化による除去作用とが原料粉末成形
体の全体で均一になされないために、成形体の内部の生
成条件の有利な部分において選択的に超電導物質が生成
されることになり、その他の部分には不完全な超電導物
質が生成されるために、成形体の全体に均一に超電導物
質が生成されないものと推定している。First, when producing superconducting materials by heat-treating oxides and carbonates as described above, the mixed oxide powder and carbonate are thermally decomposed, and then unnecessary components such as carbon are gasified. The constituent elements of the superconductor then react with each other to produce a superconductor. However, because the thermal decomposition of the raw material powder and the removal action by gasification of unnecessary components are not performed uniformly throughout the raw material powder compact, the superconducting material is selectively removed in areas where the formation conditions are favorable inside the compact. It is assumed that the superconducting material is not uniformly produced throughout the molded body because the superconducting material is incompletely produced in other parts.
本発明は、前記背景に鑑みてなされたもので、超電導物
質が全体に均一に生成された超電導材料を得ることがで
きる製造方法を提供することを目的とする。The present invention has been made in view of the above background, and an object of the present invention is to provide a manufacturing method capable of obtaining a superconducting material in which a superconducting substance is uniformly generated throughout.
「問題点を解決するための手段」
本発明は、前記問題点を解決するために、酸化物系超電
粉末を超電導体の臨界温度以下の温度で磁場をかけて浮
遊させ、浮遊した粉末のみを回収するものである。"Means for Solving the Problems" In order to solve the problems mentioned above, the present invention provides a method for suspending oxide-based superelectric powder by applying a magnetic field at a temperature below the critical temperature of the superconductor, and only dissolving the suspended powder. The purpose is to collect
「作用 」
超電導物質が生成されている粉体は完全反磁性を示すた
めに、臨界温度以下に冷却して粉末に磁場をかけた場合
、超電導物質が生成された粉体のみが浮遊する。従って
磁場中で浮遊した粉体のみを選別すると超電導物質が均
一に生成された高品質の粉末状超電導材料を得ることが
できる。``Operation'' Powder containing superconducting substances exhibits complete diamagnetic properties, so when the powder is cooled below a critical temperature and a magnetic field is applied to the powder, only the powder containing superconducting substances becomes suspended. Therefore, by selecting only the powder suspended in a magnetic field, it is possible to obtain a high-quality powdered superconducting material in which superconducting substances are uniformly produced.
「実施例」 以下に本発明を更に詳細に説明する。"Example" The present invention will be explained in more detail below.
・ 本発明方法を実施してＡ −Ｂ −Ｃｕ−０系の超
電導材料（ただし、ＡはＬａ、Ｃｅ、Ｙ、Ｓｃ、Ｙｂ等
の周期律表ｕｌａ族元素の１種以上を示し、ＢはＳｒ、
Ｂａ等のアルカリ土類金属元素の１種以上を示す）を製
造する場合には、まず、前記ｍａ族元素の化合物粉末（
ｎｌａ族元素の酸化物粉末、塩化物粉末、炭酸塩等）と
アルカリ土類金属の化合物粉末と酸化銅の粉末を用意し
て、これらを目的とする超電導材料の組成となるように
混合する。- A-B-Cu-0 system superconducting material obtained by carrying out the method of the present invention (where A represents one or more elements of the ULA group of the periodic table, such as La, Ce, Y, Sc, Yb, etc., and B represents Sr.
When producing one or more alkaline earth metal elements such as Ba), first, the compound powder of the Ma group element (
NLA group element oxide powder, chloride powder, carbonate, etc.), alkaline earth metal compound powder, and copper oxide powder are prepared and mixed to form the composition of the intended superconducting material.
次に前記粉末を圧粉成形して例えば第１図に示すように
貫通孔ｌを有する円柱状の成形体２を得る。Next, the powder is compacted to obtain, for example, a cylindrical molded body 2 having through holes 1 as shown in FIG.
この成形体２において、貫通孔Ｉの直径ｄは、成形体の
直径りに対して、ｄ＝ １／３Ｄ −１１５０Ｄの範囲
が好ましく、また、貫通孔Ｉの体積は成形体２の体積に
対して３０％以下にすることが望ましい。In this molded body 2, the diameter d of the through hole I is preferably in the range of d = 1/3D - 1150D with respect to the diameter of the molded body, and the volume of the through hole I is It is desirable to keep it below 30%.
ここで、貫通孔ｌの体積が３０％を超えるようであると
成形体２０体積の比較して得られる超電導材料の量が少
なくなる。Here, if the volume of the through hole 1 exceeds 30%, the amount of superconducting material obtained by comparing the volume of the molded body 20 will be reduced.
次にこの成形体に超電導物質を生成させる加熱処理を施
す。成形体２の加熱処理は、生成する酸化物系超電導材
料の種類により適宜設定されるか、前述したＡ −Ｂ
−Ｃｕ−０系の超電導材料を生成するには、７００〜１
３００℃に１〜３００時間加熱するものとする。また、
この熱処理は、真空雰囲気、あるいはアルゴンガス雰囲
気等の不活性ガス雰囲気、または、酸素ガス雰囲気、塩
素ガス雰囲気、フッ素ガス雰囲気、あるいは、これらの
混合ガス雰囲気で行うことが好ましい。Next, this molded body is subjected to a heat treatment to generate a superconducting substance. The heat treatment of the molded body 2 may be appropriately set depending on the type of oxide superconducting material to be produced, or may be performed by
-700 to 1 to produce a Cu-0-based superconducting material
It shall be heated to 300°C for 1 to 300 hours. Also,
This heat treatment is preferably performed in a vacuum atmosphere, an inert gas atmosphere such as an argon gas atmosphere, an oxygen gas atmosphere, a chlorine gas atmosphere, a fluorine gas atmosphere, or a mixed gas atmosphere thereof.
この加熱処理によって成形体２からは原料粉末中に含ま
れる水蒸気や成分元素のガスが成形体２の外面と貫通孔
ｌから効率良く放出されたり、必要成分元素のガスが吸
収され、成形体２の内部で各成分が反応して超電導物質
が生成される。なお、面記加熱処理時には、各元素の気
体が貫通孔！から円滑に排出されたり、吸収されるため
に、成形体２の全体に、より均一に超電導物質を生成さ
せることができる。なお、前記のように各元素の気体を
貫通孔ｌから排出したり、吸収できるために、大きな成
形体２を形成した場合であっても、成形体の内部まで十
分に反応を生じさせることができる。即ち、大きな成形
体を用いて超電導材料を、製造可能となり、製造効率を
向上できる効果がある。Through this heat treatment, water vapor contained in the raw material powder and gases of component elements are efficiently released from the molded body 2 from the outer surface of the molded body 2 and the gases of the component elements, and gases of necessary component elements are absorbed, and the molded body 2 Each component reacts inside the superconductor to produce a superconducting material. In addition, during the surface heat treatment, the gases of each element penetrate through the holes! Since the superconducting material is smoothly discharged or absorbed from the superconducting material, the superconducting material can be generated more uniformly throughout the molded body 2. In addition, since the gases of each element can be discharged and absorbed through the through holes 1 as described above, even when a large molded body 2 is formed, it is not possible to cause a sufficient reaction to reach the inside of the molded body. can. That is, the superconducting material can be manufactured using a large molded body, which has the effect of improving manufacturing efficiency.
そして、前記成形体２を加熱処理後に粉砕することによ
って粉末状の超電導材料を得る。この粉末状の超電導材
料にあっては、微視的に見ると完全な超電導物質が生成
されている粉末と、不完全な超電導物質が生成されてい
る粉末とが混在している。Then, a powdered superconducting material is obtained by crushing the molded body 2 after heat treatment. When viewed microscopically, this powdered superconducting material contains a mixture of powder in which a perfect superconducting substance is produced and powder in which an incomplete superconducting substance is produced.
そこで次に、この粉末状の超電導材料を臨界温度以下の
温度に冷却するとともに、磁場をかける。Next, this powdered superconducting material is cooled to a temperature below the critical temperature and a magnetic field is applied.
ここで磁場中の粉末状の超電導材料において、完全な超
電導物質が生成されている粉末は完全反磁性を示すため
に浮遊し、不完全な超電導物質が生成されている粉末は
浮遊しない。従ってこの浮遊した粉末のみを選別すると
完全な超電導物質のみが生成されている高品質の超電導
材料を得ることができる。なお、磁場中で浮遊しない超
電導材料は、再び他の原料粉末と混合して成形体を作成
し、熱処理して再度超電導材料の製造に使用することが
できる。Here, in powdered superconducting material in a magnetic field, powder in which perfect superconducting material is produced exhibits perfect diamagnetic properties and floats, while powder in which incomplete superconducting material is produced does not float. Therefore, by selecting only this suspended powder, it is possible to obtain a high-quality superconducting material in which only perfect superconducting substances are produced. Note that a superconducting material that does not float in a magnetic field can be mixed with other raw material powders again to create a molded body, heat-treated, and used again for manufacturing the superconducting material.
第３図は、超電導粉末に磁場を作用させて選別する装置
の一例を示すものである。FIG. 3 shows an example of an apparatus for sorting superconducting powder by applying a magnetic field to it.
この例の装置は、断面Ｕ字状の容器ＩＯの内部に液体窒
素が満たされるとともに、容器ｌＯの左底部に選別すべ
き超電導粉末１１が投入され、容Ｗ ｔ Ｏの下方に容
器１０に沿って左右に移動自在に磁石１２が設けられ、
容器ＩＯの右底部に吸引管１３が挿入されて構成されて
いる。In the apparatus of this example, a container IO having a U-shaped cross section is filled with liquid nitrogen, superconducting powder 11 to be sorted is put into the left bottom part of the container IO, and the superconducting powder 11 is placed below the volume W t O along the container 10. A magnet 12 is provided so as to be movable left and right.
A suction tube 13 is inserted into the right bottom of the container IO.
この例の装置によって超電導粉末を選別するには、容器
ＩＯの左底部の液体窒素内に超電導粉末１１を投入しく
後に磁石１２を図面に示す位置から右側に移動させる。To sort superconducting powder using the apparatus of this example, the superconducting powder 11 is introduced into liquid nitrogen at the bottom left of the container IO, and then the magnet 12 is moved to the right from the position shown in the drawing.
液体窒素に投入された超電導粉末１１の中で超電導体と
なっているものは完全反磁性を示すために磁石１２が発
生させる磁力によって浮遊し、更に、磁石１２の移動と
同時に容器！０の右側に弾かれて移動する。The superconducting powder 11 placed in the liquid nitrogen exhibits perfect diamagnetic properties, so it floats due to the magnetic force generated by the magnet 12, and at the same time as the magnet 12 moves, the container! It moves to the right side of 0.
容５１０の右端部に磁石１２を移動させたならば、容器
ｌＯの右端部に移動した超電導粉末１１のみを吸引管１
３で吸引して補集する。以上の操作によって完全に超電
導体となっている粉末のみを選別することができる。こ
のように選別された超電導粉末は選別を行っていない超
電導粉末に比較して臨界電流が１０〜５０％高いもので
あった。When the magnet 12 is moved to the right end of the container 510, only the superconducting powder 11 that has moved to the right end of the container 10 is transferred to the suction tube 1.
3. Suction and collect. By the above operations, only powders that are completely superconducting can be selected. The superconducting powder thus selected had a critical current that was 10 to 50% higher than that of the superconducting powder that had not been selected.
以上のように得られた酸化物系の超電導材料は、臨界温
度が液体窒素温度以上の値を示す優れた超電導材料であ
り、従来の合金系超電導材料や化合物系超電導材料に比
較して格段に有利な冷却条件で使用することができる。The oxide-based superconducting material obtained as described above is an excellent superconducting material whose critical temperature is higher than the liquid nitrogen temperature, and is significantly superior to conventional alloy-based superconducting materials and compound-based superconducting materials. Can be used under favorable cooling conditions.
更にこのようにして得られた超電導材料は、超電導マグ
ネット材料、あるいは、超電導線材の材料、超電導テー
プ用材料等、幅広く種々の超電導体用材料として用いる
ことができる。Furthermore, the superconducting material thus obtained can be used as a wide variety of superconductor materials, such as superconducting magnet materials, superconducting wire materials, and superconducting tape materials.
なお、前述のように得られた超電導材料の粉末を金属管
に充填して加圧圧縮することにより超電導線を得ること
ができる。この超電導線にあっては、内部に充填する超
電導材料が完全な超電導物質からなる高品質のものであ
るために、臨界電流密度が高く、優れた超電導特性を発
揮する。Note that a superconducting wire can be obtained by filling a metal tube with the superconducting material powder obtained as described above and compressing it under pressure. This superconducting wire has a high critical current density and exhibits excellent superconducting properties because the superconducting material filled inside is of high quality and is made entirely of superconducting material.
ところで、前記超電導粉末の製造に使用する成形体は、
第２図に示すように多数の貫通孔ｌ・・・を形成した成
形体３を用いても良く、成形体の形状も円柱状以外の形
状であっても差し支えない。なおまた、前述のように選
別に供される超電導粉末を製造する方法には、原料粉末
を一旦溶融固化した後に熱処理する方法、あるいは、原
料粉末を攪拌しながら焼成したものを粉末化する方法な
ど、種々の方法があり、これらの方法で製造した超電導
粉末を選別するために用いることができる。By the way, the compact used for manufacturing the superconducting powder is
As shown in FIG. 2, a molded body 3 having a large number of through holes 1 may be used, and the shape of the molded body may also be other than a columnar shape. Furthermore, methods for manufacturing superconducting powder to be subjected to sorting as described above include a method in which the raw material powder is once melted and solidified and then heat treated, or a method in which the raw material powder is fired while stirring and then pulverized. There are various methods, and these methods can be used to select superconducting powder produced.
一方、Ａ −Ｂ −Ｃｕ−０系の超電導材料において、
へ元素を１ＩＩａ族元素の２つ以上の元素から構成し、
Ｂ元素をアルカリ土類金属元素の２つ以上から構成する
ものにおいては、ｍｓ族元素の化合物粉末を２種類以上
と、アルカリ土類金属元素の化合物粉末を２種類以上と
、酸化銅粉末または銅粉末を所定の比率に混合して焼結
した後に粉砕し、本発明方法を実施すれば良い。On the other hand, in the A-B-Cu-0-based superconducting material,
The element is composed of two or more elements of group 1IIa elements,
In the case where element B is composed of two or more alkaline earth metal elements, two or more types of compound powders of MS group elements, two or more types of compound powders of alkaline earth metal elements, and copper oxide powder or copper The method of the present invention may be carried out by mixing the powders in a predetermined ratio, sintering them, and then pulverizing them.
「発明の効果」
以上説明したように本発明は、酸化物系超電導粉末にそ
の臨界温度以下の温度で磁場をかけて超電導物質が生成
されている粉末のみを浮遊させて選別するために、不完
全な超電導物質が生成されている粉末を除去し、完全な
超電導物質のみが生成されている超電導材料を得ること
ができる。この結果選別しない超電導材料に比較して本
発明を実施して得られた超電導材料は、臨界電流が１０
〜５０％高く、高品質の超電導製品を得ることができた
。"Effects of the Invention" As explained above, the present invention applies a magnetic field to oxide-based superconducting powder at a temperature below its critical temperature to suspend and select only the powder in which superconducting substances are produced. By removing the powder in which a perfect superconducting substance has been produced, it is possible to obtain a superconducting material in which only a perfect superconducting substance has been produced. As a result, the superconducting material obtained by implementing the present invention has a critical current of 10
~50% higher and higher quality superconducting products could be obtained.
第１図は本発明方法を実施する際に使用する成形体の一
例を示す斜視図、第２図は同成形体の他の例を示す斜視
図、第３図は超電導粉末を選別する装置の一例を示す断
面図である。
■・・・・・・貫通孔、 ２．３・・・・・・成形
体、ｌＯ・・・・・・容器、 １１・・・・・・超
電導粉末、１２・・・・・・磁石、 １３・・・・
・・吸引管。Fig. 1 is a perspective view showing an example of a compact used in carrying out the method of the present invention, Fig. 2 is a perspective view showing another example of the compact, and Fig. 3 is a perspective view of an apparatus for sorting superconducting powder. It is a sectional view showing an example. ■...Through hole, 2.3... Molded object, lO... Container, 11... Superconducting powder, 12... Magnet, 13...
...Suction tube.
Claims (1)
の温度で磁場をかけて浮遊させ、浮遊した粉末のみを回
収することを特徴とする酸化物系超電導材料の製造方法
。A method for producing an oxide-based superconducting material, which comprises suspending oxide-based superconducting powder by applying a magnetic field at a temperature below the critical temperature of the oxide-based superconductor, and recovering only the suspended powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62126692A JPS63291653A (en) | 1987-05-23 | 1987-05-23 | Manufacture of superconducting material of oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62126692A JPS63291653A (en) | 1987-05-23 | 1987-05-23 | Manufacture of superconducting material of oxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63291653A true JPS63291653A (en) | 1988-11-29 |
| JPH0438457B2 JPH0438457B2 (en) | 1992-06-24 |
Family
ID=14941485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62126692A Granted JPS63291653A (en) | 1987-05-23 | 1987-05-23 | Manufacture of superconducting material of oxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63291653A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63302967A (en) * | 1987-06-01 | 1988-12-09 | Semiconductor Energy Lab Co Ltd | Sorting of oxide superconducting material |
| JPH01183404A (en) * | 1988-01-14 | 1989-07-21 | Tatsuta Electric Wire & Cable Co Ltd | Method for selecting superconducting ceramic powder |
| US5049540A (en) * | 1987-11-05 | 1991-09-17 | Idaho Research Foundation | Method and means for separating and classifying superconductive particles |
-
1987
- 1987-05-23 JP JP62126692A patent/JPS63291653A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63302967A (en) * | 1987-06-01 | 1988-12-09 | Semiconductor Energy Lab Co Ltd | Sorting of oxide superconducting material |
| JPH0616864B2 (en) * | 1987-06-01 | 1994-03-09 | 株式会社半導体エネルギー研究所 | Selection method of oxide superconducting materials |
| US5049540A (en) * | 1987-11-05 | 1991-09-17 | Idaho Research Foundation | Method and means for separating and classifying superconductive particles |
| JPH01183404A (en) * | 1988-01-14 | 1989-07-21 | Tatsuta Electric Wire & Cable Co Ltd | Method for selecting superconducting ceramic powder |
| JPH0446883B2 (en) * | 1988-01-14 | 1992-07-31 | Tatsuta Densen Kk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0438457B2 (en) | 1992-06-24 |
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