JPS63313428A - Manufacture of oxide superconductive compact - Google Patents
Manufacture of oxide superconductive compactInfo
- Publication number
- JPS63313428A JPS63313428A JP62148391A JP14839187A JPS63313428A JP S63313428 A JPS63313428 A JP S63313428A JP 62148391 A JP62148391 A JP 62148391A JP 14839187 A JP14839187 A JP 14839187A JP S63313428 A JPS63313428 A JP S63313428A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- oxide
- extruded
- metal pipe
- hopper
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000843 powder Substances 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 238000011282 treatment Methods 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 12
- 239000002887 superconductor Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052802 copper Inorganic materials 0.000 abstract description 6
- 239000010949 copper Substances 0.000 abstract description 6
- 229910000881 Cu alloy Inorganic materials 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract 5
- 238000001125 extrusion Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 101100194003 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) rco-3 gene Proteins 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000002002 slurry 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】
〔産業上の利用分野〕
本発明は酸化物超電導成形体の製造方法に関し、特に長
尺物でかつ均質な酸化物超電導成形体の製造方法に係る
ものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing an oxide superconducting molded body, and particularly to a method for manufacturing a long and homogeneous oxide superconducting molded body.
最近Ｙ−Ｂａ−Ｃｕ−０系或いはＬａ−３ｒ−Ｃｕ−０
系などの酸化物超電導成形体が比較的高温における臨界
電流密度が高いものが得られるようになった。これらの
酸化物超電導成形体の製造方法としては、超電導体とな
る酸化物粉末を、銅または銅合金の管に詰め込み、これ
を伸線加工し所望の複合線として熱処理を施し酸化物超
電導体としていた。しかしこの方法においては既製の管
を用いるためその長さに限度があること、粉末を管に詰
め込むために長い管では均一な詰め込みが不可能であり
、実用的な長尺で均質の酸化物超電導成形体が得られな
い問題があった。Recently, Y-Ba-Cu-0 series or La-3r-Cu-0
It has become possible to obtain oxide superconducting molded bodies such as those with high critical current densities at relatively high temperatures. The manufacturing method for these oxide superconducting molded bodies is to pack the oxide powder that will become the superconductor into a copper or copper alloy tube, and then wire-draw this to form the desired composite wire and heat treat it to form the oxide superconductor. there was. However, since this method uses a ready-made tube, there is a limit to its length, and because the powder is packed into the tube, it is impossible to pack the powder uniformly in a long tube. There was a problem that a molded body could not be obtained.
本発明は上記の問題について検討の結果、長尺でありか
つ均質な酸化物超電導成形体が得られる製造方法を開発
したものである。As a result of studies on the above-mentioned problems, the present invention has developed a manufacturing method that allows a long and homogeneous oxide superconducting molded body to be obtained.
〔問題点を解決するための手段および作用〕本発明は押
出機により押出されている金属パイプ中にホッパーを介
して酸化物超電導粉末を酸素２０％以上のガスにより加
圧供給して複合線を押出した後、該複合線を減面加工し
、これを所望形状に成形し、次いで焼結処理を施すこと
を特徴とする酸化物超電導成形体の製造方法である。す
なわち本発明は例えば第１図に示すような回転ホイール
型押出機を用いて予め所望の組成となるように配合、混
合、仮焼結、粉砕などの処理を施した酸化物超電導粉末
（１）をホッパー（支））に収容しておく、一方マンド
レル（３）とダイス（４）を有し、回転ホイール（５）
の壁面と、固定されているシェーブロック（６）の壁面
の間に、銅または銅合金などの金属棒■を回転ホイール
の回転に送り込み上記のマンドレルダイスにより金属パ
イプ（８）に成形され連続的に押出される。この際前記
ホッパー内に収容された酸化物粉末にホッパーに通じる
配管（９）により酸素２０％以上を含むガスを加圧供給
して酸化物粉末を上記の成形されつつある金属パイプ中
に加圧充填させて、内部が酸化物粉末で外部が金属パイ
プの複合線を連続的に押出し成形するものである。[Means and effects for solving the problems] The present invention produces a composite wire by supplying oxide superconducting powder under pressure with a gas containing 20% or more oxygen through a hopper into a metal pipe being extruded by an extruder. This is a method for producing an oxide superconducting molded body, which is characterized in that after extrusion, the composite wire is subjected to area reduction processing, molded into a desired shape, and then subjected to sintering treatment. That is, the present invention provides an oxide superconducting powder (1) which has been subjected to treatments such as blending, mixing, temporary sintering, and pulverization to obtain a desired composition using a rotating wheel type extruder as shown in FIG. 1, for example. is stored in a hopper (support), while having a mandrel (3) and a die (4), and a rotating wheel (5).
A metal rod made of copper or copper alloy is fed between the wall of the shaver block (6) and the wall of the fixed shaver block (6) through the rotation of the rotating wheel, and is formed into a metal pipe (8) by the mandrel die mentioned above and is continuously formed. is extruded. At this time, a gas containing 20% or more of oxygen is supplied under pressure to the oxide powder contained in the hopper through a pipe (9) leading to the hopper, and the oxide powder is pressurized into the metal pipe that is being formed. After filling, a composite wire with an oxide powder inside and a metal pipe outside is continuously extruded.
しかして本発明において使用される酸化物超電導粉末と
は例えばＹ−Ｂａ−Ｃｕ−０系酸化物超電導体の場合は
Ｙ２Ｏ２、ＢａＣＯ３、ＣｕＯの粉末であり、Ｌａ−３
ｒ−Ｃｕ−０系の場合はＬａ、ｏ、 、Ｓ ｒＣｏ３、
ＣｕＯの粉末などであるがこの他通常の酸化物超電導体
となるものであれば如何なるものでも使用でき、粉体の
他、スラリー状でもよく、また酸化物、塩化物、弗化物
などのいずれも使用できる。However, the oxide superconducting powder used in the present invention is, for example, Y2O2, BaCO3, CuO powder in the case of a Y-Ba-Cu-0 based oxide superconductor, and La-3
In the case of r-Cu-0 system, La, o, , S rCo3,
In addition to CuO powder, any other material that can be used as a normal oxide superconductor can be used, and in addition to powder, slurry forms may also be used, and any of oxides, chlorides, fluorides, etc. Can be used.
また上記の酸化物超電導粉末を酸素２０％以上のガスに
より加圧供給するのは酸素を含むガスを使用することに
より酸化物の酸化を助長するためであり、加圧するのは
金属パイプ中の混合粉を均一に充填するためである。こ
の圧力として１〜２０気圧が好ましい。In addition, the reason why the above oxide superconducting powder is supplied under pressure with a gas containing 20% or more oxygen is to promote oxidation of the oxide by using a gas containing oxygen, and the pressure is applied to the mixture in the metal pipe. This is to uniformly fill the powder. This pressure is preferably 1 to 20 atmospheres.
本発明は上記のようにして得た複合線を減面加工するも
のであるが、この際減面加工後の酸化物の密度を真密度
の７０〜９７％となるように減面加工するのは金属パイ
プ中の酸化物粉末を高密度にするもので後述するように
超電導コイルなどに成形する際の成形性に影響するから
であり、７０％未満では焼結後空孔が多くなり、成形の
際に折損したり、或いは電流密度が低下する。また９７
％を越えると成形が困難になるからである。なお減面加
工は熱間、冷間およびロール圧延、引抜きなどの何れも
適用できる。In the present invention, the composite wire obtained as described above is subjected to area reduction processing, and at this time, the area reduction processing is performed so that the density of the oxide after the area reduction processing becomes 70 to 97% of the true density. This is because it increases the density of the oxide powder in the metal pipe and affects the formability when forming it into superconducting coils, etc., as described later.If it is less than 70%, there will be many pores after sintering, making it difficult to form. During this process, it may break or the current density may decrease. 97 again
%, molding becomes difficult. Note that any of hot, cold, roll rolling, drawing, etc. can be applied to the area reduction process.
本発明はこのようにして得た細い複合線を所望の形状例
えば小型超電導コイルの場合には第２図に示す円筒コイ
ル状に成形した後焼結して超電導コイルとするものであ
る。このコイル形状としては上記の円筒状の他、第３図
（ａ）に示すような四角形、同図（ロ）の多角形、或い
は同図（Ｃ）の蛇行状などの形状に成形できる。焼結温
度は超電導組成物の種類によって若干異なるが８００℃
以上で金属パイプの融点以下の温度で焼結するものであ
る。In the present invention, the thin composite wire thus obtained is formed into a desired shape, such as a cylindrical coil shape as shown in FIG. 2 in the case of a small superconducting coil, and then sintered to form a superconducting coil. In addition to the above-mentioned cylindrical shape, the coil shape can be formed into a rectangular shape as shown in FIG. 3(a), a polygonal shape as shown in FIG. 3(b), or a meandering shape as shown in FIG. 3(c). The sintering temperature varies slightly depending on the type of superconducting composition, but is 800°C.
Sintering is performed at a temperature below the melting point of the metal pipe.
また本発明は前記した回転ホイール型押出機の他、第４
図に示すようなラム型押出機により製造することもでき
る。すなわち酸化物超電導粉末（１）をホッパー（２）
内に収容しておき、マンドレル（３）とダイス（４）を
有し、ラムＯＩにより銅または銅合金などの合金棒（７
）を押出して金属パイプ（８）が連続的に押出される。In addition to the above-mentioned rotating wheel type extruder, the present invention also provides a fourth extruder.
It can also be produced using a ram type extruder as shown in the figure. In other words, the oxide superconducting powder (1) is transferred to the hopper (2).
It has a mandrel (3) and a die (4), and an alloy rod (7) of copper or copper alloy etc. is
) and the metal pipe (8) is continuously extruded.
このとき上記のホッパー内に収容された酸化物超電導粉
末に配管（９）により酸素２０％以上を含むガスを供給
して混合粉を成形されつつある金属パイプ中に加圧充填
して複合線を連続的に押出し成形するものである。At this time, a gas containing 20% or more oxygen is supplied to the oxide superconducting powder stored in the hopper above through the pipe (9), and the mixed powder is filled under pressure into the metal pipe that is being formed to form a composite wire. It is continuously extruded.
本発明は、このように押出機により押出されつつある金
属パイプ中に超電導体となるべき酸化物粉末を酸素２０
％以上を含むガスにより加圧充填しながら押出して複合
線を成形するために酸化物粉末が均一に分布されて均質
なものができるものである。そして減面加工により密度
を調整してその後の成形の際の成形性を良好とすること
ができるのである。In the present invention, the oxide powder to become a superconductor is added to the metal pipe being extruded by the extruder in an oxygen 200
The oxide powder is uniformly distributed and a homogeneous wire is formed by extrusion while being pressurized and filled with a gas containing more than 10% of the total oxide powder. Then, the density can be adjusted by surface reduction processing to improve moldability during subsequent molding.
以下に本発明の一実施例について説明する。 An embodiment of the present invention will be described below.
Ｙ＋ＢａｇＣｕｓＯｙ−ｙとなるようにＹ、Ｏ，、Ｂａ
ｃｏｓ 、ＣｕＯの粉末を配合、混合し、この混合粉を
８００℃で仮焼結した後、粉砕して酸化物粉末とした。Y, O,, Ba so that Y+BagCusOy-y
Cos and CuO powders were blended and mixed, and this mixed powder was pre-sintered at 800°C, and then ground to give an oxide powder.
この酸化物粉末を第１図に示す回転ホイール型押出機を
用いて、ホッパーより１００％の酸素ガスを２気圧の圧
力で加圧供給した。一方金属棒に純銅を使用して回転ホ
イールを回転させて押出した銅パイプ中に上記粉末を充
填して、複合押出しを行ない外径４■φ、内径３Ｗφの
内部が酸化物粉末の複合線を作製した。この複合線を冷
間伸線して外径０．５鵬φに仕上げた。この細線の内部
の酸化物の密度は５．０ｇ／ｃｄで真空度６．０１ ｇ
／Ｃ−の８３．２％でありた。これを第２図に示す外径
１５０１１φ、長さ１００ｍｍのコイルに成形した後９
００゛Ｃで２時間焼結して超電導線を作製した。この超
電導線は８６にで超電導を示し、長尺にわたって均一な
特性を示した。This oxide powder was supplied with 100% oxygen gas under a pressure of 2 atmospheres from a hopper using a rotating wheel type extruder shown in FIG. On the other hand, using pure copper as a metal rod, the above powder was filled into a copper pipe extruded by rotating a rotary wheel, and composite extrusion was performed to form a composite wire with an outer diameter of 4 φ and an inner diameter of 3 W φ, the inside of which was made of oxide powder. Created. This composite wire was cold drawn to an outer diameter of 0.5 mm. The density of oxide inside this thin wire is 5.0 g/cd and the degree of vacuum is 6.01 g.
/C- was 83.2%. After forming this into a coil with an outer diameter of 15011φ and a length of 100 mm as shown in Figure 2, 9
A superconducting wire was produced by sintering at 00°C for 2 hours. This superconducting wire exhibited superconductivity at 86, and exhibited uniform characteristics over a long length.
以上に説明したように本発明によれば長尺で、かつ均質
な酸化物超電導成形体を製造することができ、工業上極
めて顕著な効果を奏するものであAs explained above, according to the present invention, it is possible to produce a long and homogeneous oxide superconducting molded body, which has extremely significant industrial effects.
第１図は本発明の一実施例を示す断面図、第２図および
第３図は本発明により製造した超電導コイルの説明図、
第幕図は本発明の他の実施例を示す断面図である。
１・・・酸化物粉末、 ２・・・ホッパー、 ３・・・
マンドレル、 ４・・・ダイス、 ５・・・回転ホ
イール、６・・・シューブロック、 ７・・・金属棒、
８・・・金属パイプ、 ９・・・配管、 １０・・
・ラム。FIG. 1 is a sectional view showing one embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of a superconducting coil manufactured according to the present invention,
The third curtain is a sectional view showing another embodiment of the present invention. 1... Oxide powder, 2... Hopper, 3...
Mandrel, 4... Dice, 5... Rotating wheel, 6... Shoe block, 7... Metal rod,
8...Metal pipe, 9...Piping, 10...
・Rum.
Claims (4)
パーを介し酸化物超電導粉末を酸素２０％以上のガスに
より加圧供給して複合線を押出した後、該複合線を減面
加工し、これを所望形状に成形し、次いで焼結処理を施
すことを特徴とする酸化物超電導成形体の製造方法。(1) After extruding a composite wire by supplying oxide superconducting powder under pressure with a gas containing 20% or more oxygen through a hopper into a metal pipe being extruded by an extruder, the composite wire is processed to reduce its area, A method for producing an oxide superconducting molded body, which comprises molding the molded body into a desired shape and then subjecting it to a sintering treatment.
の７０〜９７％になるように減面加工することを特徴と
する特許請求の範囲第１項記載の酸化物超電導成形体の
製造方法。(2) The oxide superconducting compact according to claim 1, wherein the oxide superconductor powder is subjected to the area-reducing process so that the density of the oxide superconductor powder after the area-reducing process becomes 70 to 97% of the true density. manufacturing method.
とする特許請求の範囲第１項または第２項記載の酸化物
超電導成形体の製造方法。(3) The method for producing an oxide superconducting molded body according to claim 1 or 2, wherein the extruder is a rotating wheel type extruder.
許請求の範囲第１項または第２項記載の酸化物超電導成
形体の製造方法。(4) The method for producing an oxide superconducting molded body according to claim 1 or 2, wherein the extruder is a ram type extruder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62148391A JP2507744B2 (en) | 1987-06-15 | 1987-06-15 | Method for producing oxide superconducting molded body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62148391A JP2507744B2 (en) | 1987-06-15 | 1987-06-15 | Method for producing oxide superconducting molded body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63313428A true JPS63313428A (en) | 1988-12-21 |
| JP2507744B2 JP2507744B2 (en) | 1996-06-19 |
Family
ID=15451727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62148391A Expired - Fee Related JP2507744B2 (en) | 1987-06-15 | 1987-06-15 | Method for producing oxide superconducting molded body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2507744B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH056716A (en) * | 1987-09-28 | 1993-01-14 | Hitachi Ltd | Oxide high temperature superconductor |
-
1987
- 1987-06-15 JP JP62148391A patent/JP2507744B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH056716A (en) * | 1987-09-28 | 1993-01-14 | Hitachi Ltd | Oxide high temperature superconductor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2507744B2 (en) | 1996-06-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |